<?xml version="1.0" encoding="US-ASCII"?>
<!--XBRL Document Created with Wdesk from Workiva-->
<!-- -->
<linkbase xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <roleRef roleURI="http://www.mrcy.com/role/Acquisitions" xlink:href="mrcy-20160331.xsd#Acquisitions" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/AcquisitionsNarrativeDetails" xlink:href="mrcy-20160331.xsd#AcquisitionsNarrativeDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/AcquisitionsNetPurchasePriceAndFairValuesOfAssetsAndLiabilitiesAcquiredDetails" xlink:href="mrcy-20160331.xsd#AcquisitionsNetPurchasePriceAndFairValuesOfAssetsAndLiabilitiesAcquiredDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/AcquisitionsTables" xlink:href="mrcy-20160331.xsd#AcquisitionsTables" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/BasicAndDilutedWeightedAverageSharesOutstandingDetail" xlink:href="mrcy-20160331.xsd#BasicAndDilutedWeightedAverageSharesOutstandingDetail" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/ChangesInCarryingAmountOfGoodwillDetail" xlink:href="mrcy-20160331.xsd#ChangesInCarryingAmountOfGoodwillDetail" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/CommitmentsAndContingencies" xlink:href="mrcy-20160331.xsd#CommitmentsAndContingencies" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/CommitmentsAndContingenciesAdditionalInformationDetail" xlink:href="mrcy-20160331.xsd#CommitmentsAndContingenciesAdditionalInformationDetail" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/ConsolidatedBalanceSheets" xlink:href="mrcy-20160331.xsd#ConsolidatedBalanceSheets" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:href="mrcy-20160331.xsd#ConsolidatedBalanceSheetsParenthetical" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/ConsolidatedStatementsOfCashFlows" xlink:href="mrcy-20160331.xsd#ConsolidatedStatementsOfCashFlows" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/ConsolidatedStatementsOfOperationsAndComprehensiveLoss" xlink:href="mrcy-20160331.xsd#ConsolidatedStatementsOfOperationsAndComprehensiveLoss" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/Debt" xlink:href="mrcy-20160331.xsd#Debt" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/DebtAdditionalInformationDetail" xlink:href="mrcy-20160331.xsd#DebtAdditionalInformationDetail" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/DescriptionOfBusiness" xlink:href="mrcy-20160331.xsd#DescriptionOfBusiness" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/DescriptionOfBusinessDetails" xlink:href="mrcy-20160331.xsd#DescriptionOfBusinessDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/DiscontinuedOperations" xlink:href="mrcy-20160331.xsd#DiscontinuedOperations" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/DiscontinuedOperationsDepreciationAmortizationCapitalExpendituresAndSignificantNoncashItemsDetails" xlink:href="mrcy-20160331.xsd#DiscontinuedOperationsDepreciationAmortizationCapitalExpendituresAndSignificantNoncashItemsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/DiscontinuedOperationsLossIncomeFromDiscontinuedOperationsDetails" xlink:href="mrcy-20160331.xsd#DiscontinuedOperationsLossIncomeFromDiscontinuedOperationsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/DiscontinuedOperationsTables" xlink:href="mrcy-20160331.xsd#DiscontinuedOperationsTables" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/DocumentAndEntityInformation" xlink:href="mrcy-20160331.xsd#DocumentAndEntityInformation" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/ExpensesByReportableSegmentForRestructuringPlansDetail" xlink:href="mrcy-20160331.xsd#ExpensesByReportableSegmentForRestructuringPlansDetail" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/FairValueOfFinancialInstruments" xlink:href="mrcy-20160331.xsd#FairValueOfFinancialInstruments" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/FairValueOfFinancialInstrumentsSummaryOfFinancialAssetsMeasuredAtFairValueOnRecurringBasisDetail" xlink:href="mrcy-20160331.xsd#FairValueOfFinancialInstrumentsSummaryOfFinancialAssetsMeasuredAtFairValueOnRecurringBasisDetail" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/FairValueOfFinancialInstrumentsTables" xlink:href="mrcy-20160331.xsd#FairValueOfFinancialInstrumentsTables" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/Goodwill" xlink:href="mrcy-20160331.xsd#Goodwill" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/GoodwillAdditionalInformationDetail" xlink:href="mrcy-20160331.xsd#GoodwillAdditionalInformationDetail" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/GoodwillTables" xlink:href="mrcy-20160331.xsd#GoodwillTables" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/IncomeTaxes" xlink:href="mrcy-20160331.xsd#IncomeTaxes" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/IncomeTaxesAdditionalInformationDetail" xlink:href="mrcy-20160331.xsd#IncomeTaxesAdditionalInformationDetail" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/Inventory" xlink:href="mrcy-20160331.xsd#Inventory" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/InventoryAdditionalInformationDetail" xlink:href="mrcy-20160331.xsd#InventoryAdditionalInformationDetail" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/InventoryDetail" xlink:href="mrcy-20160331.xsd#InventoryDetail" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/InventoryTables" xlink:href="mrcy-20160331.xsd#InventoryTables" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/OperatingSegmentGeographicInformationAndSignificantCustomers" xlink:href="mrcy-20160331.xsd#OperatingSegmentGeographicInformationAndSignificantCustomers" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/OperatingSegmentGeographicInformationAndSignificantCustomersCustomersComprisingTenPercentOrMoreRevenuesDetail" xlink:href="mrcy-20160331.xsd#OperatingSegmentGeographicInformationAndSignificantCustomersCustomersComprisingTenPercentOrMoreRevenuesDetail" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/OperatingSegmentGeographicInformationAndSignificantCustomersGeographicDistributionOfRevenuesAndLongLivedAssetsFromContinuingOperationsDetail" xlink:href="mrcy-20160331.xsd#OperatingSegmentGeographicInformationAndSignificantCustomersGeographicDistributionOfRevenuesAndLongLivedAssetsFromContinuingOperationsDetail" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/OperatingSegmentGeographicInformationAndSignificantCustomersProgramsComprisingTenPercentOrMoreOfCompanysRevenueDetail" xlink:href="mrcy-20160331.xsd#OperatingSegmentGeographicInformationAndSignificantCustomersProgramsComprisingTenPercentOrMoreOfCompanysRevenueDetail" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/OperatingSegmentGeographicInformationAndSignificantCustomersReconcilesNetIncomeLossMostDirectlyComparableGaapFinancialMeasureToAdjustedEbitdaDetail" xlink:href="mrcy-20160331.xsd#OperatingSegmentGeographicInformationAndSignificantCustomersReconcilesNetIncomeLossMostDirectlyComparableGaapFinancialMeasureToAdjustedEbitdaDetail" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/OperatingSegmentGeographicInformationAndSignificantCustomersSummaryOfPerformanceOfOperationsByReportableSegmentDetail" xlink:href="mrcy-20160331.xsd#OperatingSegmentGeographicInformationAndSignificantCustomersSummaryOfPerformanceOfOperationsByReportableSegmentDetail" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/OperatingSegmentGeographicInformationAndSignificantCustomersTables" xlink:href="mrcy-20160331.xsd#OperatingSegmentGeographicInformationAndSignificantCustomersTables" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/RestructuringPlan" xlink:href="mrcy-20160331.xsd#RestructuringPlan" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/RestructuringPlanAdditionalInformationDetail" xlink:href="mrcy-20160331.xsd#RestructuringPlanAdditionalInformationDetail" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/RestructuringPlanTables" xlink:href="mrcy-20160331.xsd#RestructuringPlanTables" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/StockBasedCompensation" xlink:href="mrcy-20160331.xsd#StockBasedCompensation" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/StockBasedCompensationAdditionalInformationDetail" xlink:href="mrcy-20160331.xsd#StockBasedCompensationAdditionalInformationDetail" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/StockBasedCompensationExpensesDetail" xlink:href="mrcy-20160331.xsd#StockBasedCompensationExpensesDetail" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/StockBasedCompensationTables" xlink:href="mrcy-20160331.xsd#StockBasedCompensationTables" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/SubsequentEvents" xlink:href="mrcy-20160331.xsd#SubsequentEvents" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/SubsequentEventsDetails" xlink:href="mrcy-20160331.xsd#SubsequentEventsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/SummaryOfNonvestedRestrictedStockDetail" xlink:href="mrcy-20160331.xsd#SummaryOfNonvestedRestrictedStockDetail" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/SummaryOfSignificantAccountingPolicies" xlink:href="mrcy-20160331.xsd#SummaryOfSignificantAccountingPolicies" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/SummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" xlink:href="mrcy-20160331.xsd#SummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/SummaryOfSignificantAccountingPoliciesPolicies" xlink:href="mrcy-20160331.xsd#SummaryOfSignificantAccountingPoliciesPolicies" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/SummaryOfSignificantAccountingPoliciesTables" xlink:href="mrcy-20160331.xsd#SummaryOfSignificantAccountingPoliciesTables" xlink:type="simple" />
  <roleRef roleURI="http://www.mrcy.com/role/SummaryOfStockOptionPlansDetail" xlink:href="mrcy-20160331.xsd#SummaryOfStockOptionPlansDetail" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedLabel" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedNetLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedNetLabel" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodEndLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodEndLabel" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodStartLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodStartLabel" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTerseLabel" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTotalLabel" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/netLabel" xlink:href="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd#netLabel" xlink:type="simple" />
  <presentationLink xlink:role="http://www.mrcy.com/role/Acquisitions" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationsAbstract" xlink:label="loc_us-gaap_BusinessCombinationsAbstract_EEA603716F9A5EEE3F57D0F9341D7E8B" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationDisclosureTextBlock" xlink:label="loc_us-gaap_BusinessCombinationDisclosureTextBlock_99763BD1F7DE3B932166D0F9341D2201" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationsAbstract_EEA603716F9A5EEE3F57D0F9341D7E8B" xlink:to="loc_us-gaap_BusinessCombinationDisclosureTextBlock_99763BD1F7DE3B932166D0F9341D2201" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/AcquisitionsNarrativeDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationsAbstract" xlink:label="loc_us-gaap_BusinessCombinationsAbstract_525FC2294183B18EF63E82170F808F89" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_4E63D16ECFC953F4ACDF82170F9069A7" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationsAbstract_525FC2294183B18EF63E82170F808F89" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_4E63D16ECFC953F4ACDF82170F9069A7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_CC86D7DD99569878FF2982170F90C72D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_4E63D16ECFC953F4ACDF82170F9069A7" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_CC86D7DD99569878FF2982170F90C72D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_655E043734D259C5672982170F903115" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_CC86D7DD99569878FF2982170F90C72D" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_655E043734D259C5672982170F903115" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DevelopedTechnologyRightsMember" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_29FAE507EFDF4F190B3482170F90B998" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_655E043734D259C5672982170F903115" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_29FAE507EFDF4F190B3482170F90B998" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CustomerRelationshipsMember" xlink:label="loc_us-gaap_CustomerRelationshipsMember_63C6293F60502DDB09C882170F90001E" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_655E043734D259C5672982170F903115" xlink:to="loc_us-gaap_CustomerRelationshipsMember_63C6293F60502DDB09C882170F90001E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OrderOrProductionBacklogMember" xlink:label="loc_us-gaap_OrderOrProductionBacklogMember_834E9517500CB082B67B82170F908D5A" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_655E043734D259C5672982170F903115" xlink:to="loc_us-gaap_OrderOrProductionBacklogMember_834E9517500CB082B67B82170F908D5A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_5FBBE4AEAA0FCE4692F982170F909B9F" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_4E63D16ECFC953F4ACDF82170F9069A7" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_5FBBE4AEAA0FCE4692F982170F909B9F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_86456B28BDBD21077C9D82170F9047E1" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_5FBBE4AEAA0FCE4692F982170F909B9F" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_86456B28BDBD21077C9D82170F9047E1" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_LewisInnovativeTechnologiesInc.LITMember" xlink:label="loc_mrcy_LewisInnovativeTechnologiesInc.LITMember_B81B5D1716C958D7406882170F90F57F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_86456B28BDBD21077C9D82170F9047E1" xlink:to="loc_mrcy_LewisInnovativeTechnologiesInc.LITMember_B81B5D1716C958D7406882170F90F57F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_C2E2ACCCEAC7AB56D1D482170F90D2D8" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_4E63D16ECFC953F4ACDF82170F9069A7" xlink:to="loc_us-gaap_BusinessAcquisitionLineItems_C2E2ACCCEAC7AB56D1D482170F90D2D8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_71ADF3FF48A6B48BC3E382170F90A08F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_C2E2ACCCEAC7AB56D1D482170F90D2D8" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_71ADF3FF48A6B48BC3E382170F90A08F" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_BusinessAcquisitionCostOfAcquiredEntityAmountInEscrow" xlink:label="loc_mrcy_BusinessAcquisitionCostOfAcquiredEntityAmountInEscrow_773A73775BAC8D889FA382170F90160E" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_C2E2ACCCEAC7AB56D1D482170F90D2D8" xlink:to="loc_mrcy_BusinessAcquisitionCostOfAcquiredEntityAmountInEscrow_773A73775BAC8D889FA382170F90160E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_F0CF74831BBCF47E0A9682170F907ED0" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_C2E2ACCCEAC7AB56D1D482170F90D2D8" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_F0CF74831BBCF47E0A9682170F907ED0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_0123FE90AB27D65FAA7882170F9095A7" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_C2E2ACCCEAC7AB56D1D482170F90D2D8" xlink:to="loc_us-gaap_Goodwill_0123FE90AB27D65FAA7882170F9095A7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual" xlink:label="loc_us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual_1C8EF5824A0B9D9671E982170F90251C" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_C2E2ACCCEAC7AB56D1D482170F90D2D8" xlink:to="loc_us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual_1C8EF5824A0B9D9671E982170F90251C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual" xlink:label="loc_us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual_97A3351854B0DFAA38A182170F90A4B4" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_C2E2ACCCEAC7AB56D1D482170F90D2D8" xlink:to="loc_us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual_97A3351854B0DFAA38A182170F90A4B4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAdditionalDisclosuresAcquisitionCostExpensed" xlink:label="loc_us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAdditionalDisclosuresAcquisitionCostExpensed_68A7F76C940B6C77123E82170F90E783" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_C2E2ACCCEAC7AB56D1D482170F90D2D8" xlink:to="loc_us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAdditionalDisclosuresAcquisitionCostExpensed_68A7F76C940B6C77123E82170F90E783" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesGross" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_7B96DF360CF5F7B55AD982170F9033BC" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_C2E2ACCCEAC7AB56D1D482170F90D2D8" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_7B96DF360CF5F7B55AD982170F9033BC" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/AcquisitionsNetPurchasePriceAndFairValuesOfAssetsAndLiabilitiesAcquiredDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationsAbstract" xlink:label="loc_us-gaap_BusinessCombinationsAbstract_3DF474CC5E951EC0AF4CD0F936378C2A" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_51BE7EABC66BE7BDE6CCD0F936386EF4" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationsAbstract_3DF474CC5E951EC0AF4CD0F936378C2A" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_51BE7EABC66BE7BDE6CCD0F936386EF4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_38EBD7D34640C68284A1D0F936381600" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_51BE7EABC66BE7BDE6CCD0F936386EF4" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_38EBD7D34640C68284A1D0F936381600" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_12DE627C16437F16FAF8D0F93638A2DE" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_38EBD7D34640C68284A1D0F936381600" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_12DE627C16437F16FAF8D0F93638A2DE" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_LewisInnovativeTechnologiesInc.LITMember" xlink:label="loc_mrcy_LewisInnovativeTechnologiesInc.LITMember_EB8705805478D1BA9F86D0F93638A7AD" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_12DE627C16437F16FAF8D0F93638A2DE" xlink:to="loc_mrcy_LewisInnovativeTechnologiesInc.LITMember_EB8705805478D1BA9F86D0F93638A7AD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_199079C5104183DFC178D0F936389456" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_51BE7EABC66BE7BDE6CCD0F936386EF4" xlink:to="loc_us-gaap_BusinessAcquisitionLineItems_199079C5104183DFC178D0F936389456" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferredAbstract" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferredAbstract_3191509797082C6CB78DD0F93638CBA4" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_199079C5104183DFC178D0F936389456" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferredAbstract_3191509797082C6CB78DD0F93638CBA4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesGross" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_840B9A5469A4ADD2BDA8D0F9363865FC" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationConsiderationTransferredAbstract_3191509797082C6CB78DD0F93638CBA4" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_840B9A5469A4ADD2BDA8D0F9363865FC" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_BusinessCombinationsConsiderationTransferredWorkingCapitalAdjustment" xlink:label="loc_mrcy_BusinessCombinationsConsiderationTransferredWorkingCapitalAdjustment_5BCDD52D2EA8B47B98A3D0F93638CE81" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationConsiderationTransferredAbstract_3191509797082C6CB78DD0F93638CBA4" xlink:to="loc_mrcy_BusinessCombinationsConsiderationTransferredWorkingCapitalAdjustment_5BCDD52D2EA8B47B98A3D0F93638CE81" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CashAcquiredFromAcquisition" xlink:label="loc_us-gaap_CashAcquiredFromAcquisition_2666B3189639A4C8B4FFD0F936384980" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationConsiderationTransferredAbstract_3191509797082C6CB78DD0F93638CBA4" xlink:to="loc_us-gaap_CashAcquiredFromAcquisition_2666B3189639A4C8B4FFD0F936384980" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_B656D832E00F0D82E7B2D0F936386B5E" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationConsiderationTransferredAbstract_3191509797082C6CB78DD0F93638CBA4" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_B656D832E00F0D82E7B2D0F936386B5E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_6510B5F45DE51ED47487D0F93638A5C9" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_199079C5104183DFC178D0F936389456" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_6510B5F45DE51ED47487D0F93638A5C9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_C84111E9B3ABE709CE64D0F93638B697" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_6510B5F45DE51ED47487D0F93638A5C9" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_C84111E9B3ABE709CE64D0F93638B697" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_797D66A25EC6926EB327D0F93639D1EA" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_6510B5F45DE51ED47487D0F93638A5C9" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_797D66A25EC6926EB327D0F93639D1EA" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherCurrentandNoncurrentAssets" xlink:label="loc_mrcy_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherCurrentandNoncurrentAssets_E5C903E4C786F1AF7068D0F93639F1DF" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_6510B5F45DE51ED47487D0F93638A5C9" xlink:to="loc_mrcy_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherCurrentandNoncurrentAssets_E5C903E4C786F1AF7068D0F93639F1DF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities_5544E56B43A3B496A143D0F93639B964" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_6510B5F45DE51ED47487D0F93638A5C9" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities_5544E56B43A3B496A143D0F93639B964" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedNetTangibleAssetsAcquired" xlink:label="loc_mrcy_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedNetTangibleAssetsAcquired_625243A7D1182546EE6BD0F936390F90" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_6510B5F45DE51ED47487D0F93638A5C9" xlink:to="loc_mrcy_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedNetTangibleAssetsAcquired_625243A7D1182546EE6BD0F936390F90" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_805E78437D0CC29A953BD0F93639DF76" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_199079C5104183DFC178D0F936389456" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_805E78437D0CC29A953BD0F93639DF76" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_3A2B71B3D4F36D65EFCFD0F93639B672" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_199079C5104183DFC178D0F936389456" xlink:to="loc_us-gaap_Goodwill_3A2B71B3D4F36D65EFCFD0F93639B672" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_4EDBC2C642ABB3CF731DD0F93639A817" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_199079C5104183DFC178D0F936389456" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_4EDBC2C642ABB3CF731DD0F93639A817" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/AcquisitionsTables" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationsAbstract" xlink:label="loc_us-gaap_BusinessCombinationsAbstract_DAA5E1BEE2F8D6EAF938D0F9348E002E" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTextBlock" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTextBlock_93F4805CB4DB7DA8260ED0F9348E24E1" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationsAbstract_DAA5E1BEE2F8D6EAF938D0F9348E002E" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTextBlock_93F4805CB4DB7DA8260ED0F9348E24E1" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/BasicAndDilutedWeightedAverageSharesOutstandingDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EarningsPerShareAbstract" xlink:label="loc_us-gaap_EarningsPerShareAbstract_649EDCE55BECB6A07583D0F933F27D87" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable" xlink:label="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_22BFBB32939429DAF30FD0F933F38475" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareAbstract_649EDCE55BECB6A07583D0F933F27D87" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_22BFBB32939429DAF30FD0F933F38475" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_7297E6AC8779782B763FD0F933F3081B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_22BFBB32939429DAF30FD0F933F38475" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_7297E6AC8779782B763FD0F933F3081B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AntidilutiveSecuritiesNameDomain" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_EFE4E66C43E6876FD820D0F933F3247A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_7297E6AC8779782B763FD0F933F3081B" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_EFE4E66C43E6876FD820D0F933F3247A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_C2CD2282BA0B04345884D0F933F3C792" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_22BFBB32939429DAF30FD0F933F38475" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_C2CD2282BA0B04345884D0F933F3C792" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_C1FE5E0FF220286CBF16D0F933F33ED3" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_C2CD2282BA0B04345884D0F933F3C792" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_C1FE5E0FF220286CBF16D0F933F33ED3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_9CC28B87D31C0C39E654D0F933F352F9" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareAbstract_649EDCE55BECB6A07583D0F933F27D87" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_9CC28B87D31C0C39E654D0F933F352F9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment" xlink:label="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_AE8AB6A691397066FDB5D0F933F3F420" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareAbstract_649EDCE55BECB6A07583D0F933F27D87" xlink:to="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_AE8AB6A691397066FDB5D0F933F3F420" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_35A6DB7BE3276FBB2271D0F933F32C56" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareAbstract_649EDCE55BECB6A07583D0F933F27D87" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_35A6DB7BE3276FBB2271D0F933F32C56" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/ChangesInCarryingAmountOfGoodwillDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_C07720FDF94B1D5D12D5D0F934373D93" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfGoodwillTable" xlink:label="loc_us-gaap_ScheduleOfGoodwillTable_794AFEBE17D8F2BB1E86D0F934371065" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_C07720FDF94B1D5D12D5D0F934373D93" xlink:to="loc_us-gaap_ScheduleOfGoodwillTable_794AFEBE17D8F2BB1E86D0F934371065" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_23C94AFD51B6B878C4FCD0F934370523" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_794AFEBE17D8F2BB1E86D0F934371065" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_23C94AFD51B6B878C4FCD0F934370523" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_E327FD4CCF6BA235D389D0F93437390F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_23C94AFD51B6B878C4FCD0F934370523" xlink:to="loc_us-gaap_SegmentDomain_E327FD4CCF6BA235D389D0F93437390F" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_MercuryCommercialElectronicsMember" xlink:label="loc_mrcy_MercuryCommercialElectronicsMember_4840D75D22D84029EC62D0F934373622" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentDomain_E327FD4CCF6BA235D389D0F93437390F" xlink:to="loc_mrcy_MercuryCommercialElectronicsMember_4840D75D22D84029EC62D0F934373622" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_MercuryDefenseSystemsMember" xlink:label="loc_mrcy_MercuryDefenseSystemsMember_50A327A24D1F6D652127D0F93437575A" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentDomain_E327FD4CCF6BA235D389D0F93437390F" xlink:to="loc_mrcy_MercuryDefenseSystemsMember_50A327A24D1F6D652127D0F93437575A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_GoodwillLineItems" xlink:label="loc_us-gaap_GoodwillLineItems_4AA1CFFE2B6DDD6510D3D0F934378E6C" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_794AFEBE17D8F2BB1E86D0F934371065" xlink:to="loc_us-gaap_GoodwillLineItems_4AA1CFFE2B6DDD6510D3D0F934378E6C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_GoodwillRollForward" xlink:label="loc_us-gaap_GoodwillRollForward_9233AFECCE606F852FC0D0F934376F25" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillLineItems_4AA1CFFE2B6DDD6510D3D0F934378E6C" xlink:to="loc_us-gaap_GoodwillRollForward_9233AFECCE606F852FC0D0F934376F25" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_6BE736F5517C00FBF88CD0F93437227B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillRollForward_9233AFECCE606F852FC0D0F934376F25" xlink:to="loc_us-gaap_Goodwill_6BE736F5517C00FBF88CD0F93437227B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_GoodwillOtherChanges" xlink:label="loc_us-gaap_GoodwillOtherChanges_956C4900299A9A40CE38D0F934379259" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillRollForward_9233AFECCE606F852FC0D0F934376F25" xlink:to="loc_us-gaap_GoodwillOtherChanges_956C4900299A9A40CE38D0F934379259" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_AFCEB7F250F8519B0886D0F9343894D6" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillRollForward_9233AFECCE606F852FC0D0F934376F25" xlink:to="loc_us-gaap_Goodwill_AFCEB7F250F8519B0886D0F9343894D6" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/CommitmentsAndContingencies" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:label="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_70F71AF0D3049E2EC9E8D0F935E40AC3" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureTextBlock" xlink:label="loc_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_02B8031098B502AD5260D0F935E49A32" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_70F71AF0D3049E2EC9E8D0F935E40AC3" xlink:to="loc_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_02B8031098B502AD5260D0F935E49A32" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/CommitmentsAndContingenciesAdditionalInformationDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:label="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_811202F2D98E46DC4E9E72AF8BD29071" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LongTermPurchaseCommitmentTable" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentTable_D6873C65BC3BBBE8C4E772AF8BD29B80" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_811202F2D98E46DC4E9E72AF8BD29071" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentTable_D6873C65BC3BBBE8C4E772AF8BD29B80" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LeaseArrangementTypeAxis" xlink:label="loc_us-gaap_LeaseArrangementTypeAxis_87A14DC3164D9179D23372AF8BD2DF98" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentTable_D6873C65BC3BBBE8C4E772AF8BD29B80" xlink:to="loc_us-gaap_LeaseArrangementTypeAxis_87A14DC3164D9179D23372AF8BD2DF98" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LeaseArrangementTypeDomain" xlink:label="loc_us-gaap_LeaseArrangementTypeDomain_931C91FF26AA931468DE72AF8BD2FF79" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LeaseArrangementTypeAxis_87A14DC3164D9179D23372AF8BD2DF98" xlink:to="loc_us-gaap_LeaseArrangementTypeDomain_931C91FF26AA931468DE72AF8BD2FF79" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_AndoverMassachusettsLeaseMember" xlink:label="loc_mrcy_AndoverMassachusettsLeaseMember_B74FEEB5DEBCF382A0CE72AF8BD2D644" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LeaseArrangementTypeDomain_931C91FF26AA931468DE72AF8BD2FF79" xlink:to="loc_mrcy_AndoverMassachusettsLeaseMember_B74FEEB5DEBCF382A0CE72AF8BD2D644" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="loc_us-gaap_StatementScenarioAxis_77E9432966E26427A25872AF8BD248E6" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentTable_D6873C65BC3BBBE8C4E772AF8BD29B80" xlink:to="loc_us-gaap_StatementScenarioAxis_77E9432966E26427A25872AF8BD248E6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_9D1BC5A288A796E9CAC572AF8BD2689F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementScenarioAxis_77E9432966E26427A25872AF8BD248E6" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_9D1BC5A288A796E9CAC572AF8BD2689F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ProFormaMember" xlink:label="loc_us-gaap_ProFormaMember_1A6FD8D44B894403A68772AF8BD27E89" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScenarioUnspecifiedDomain_9D1BC5A288A796E9CAC572AF8BD2689F" xlink:to="loc_us-gaap_ProFormaMember_1A6FD8D44B894403A68772AF8BD27E89" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LossContingenciesByNatureOfContingencyAxis" xlink:label="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_22EDC2044FF4184849A472AF8BD2AAF7" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentTable_D6873C65BC3BBBE8C4E772AF8BD29B80" xlink:to="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_22EDC2044FF4184849A472AF8BD2AAF7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LossContingencyNatureDomain" xlink:label="loc_us-gaap_LossContingencyNatureDomain_BB8BEB1EF0B26191C14072AF8BD245EC" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_22EDC2044FF4184849A472AF8BD2AAF7" xlink:to="loc_us-gaap_LossContingencyNatureDomain_BB8BEB1EF0B26191C14072AF8BD245EC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IndemnificationGuaranteeMember" xlink:label="loc_us-gaap_IndemnificationGuaranteeMember_D9D63EB04BAE8A9B742C72AF8BD2B71C" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LossContingencyNatureDomain_BB8BEB1EF0B26191C14072AF8BD245EC" xlink:to="loc_us-gaap_IndemnificationGuaranteeMember_D9D63EB04BAE8A9B742C72AF8BD2B71C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_F434F0CE1A6CFFDDC44972AF8BD2853E" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentTable_D6873C65BC3BBBE8C4E772AF8BD29B80" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_F434F0CE1A6CFFDDC44972AF8BD2853E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_317419937FF26333B83672AF8BD280D9" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_F434F0CE1A6CFFDDC44972AF8BD2853E" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_317419937FF26333B83672AF8BD280D9" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_NonCancelablePurchaseCommitmentsMember" xlink:label="loc_mrcy_NonCancelablePurchaseCommitmentsMember_34A3AE3C7783324966F572AF8BD2A3BE" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_317419937FF26333B83672AF8BD280D9" xlink:to="loc_mrcy_NonCancelablePurchaseCommitmentsMember_34A3AE3C7783324966F572AF8BD2A3BE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LongTermPurchaseCommitmentLineItems" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentLineItems_5DA1F2D124EA11A1CDBD72AF8BD289E1" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentTable_D6873C65BC3BBBE8C4E772AF8BD29B80" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentLineItems_5DA1F2D124EA11A1CDBD72AF8BD289E1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ProceedsFromOtherDeposits" xlink:label="loc_us-gaap_ProceedsFromOtherDeposits_265F0D44FD8C83418E1872AF8BD2EEA8" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_5DA1F2D124EA11A1CDBD72AF8BD289E1" xlink:to="loc_us-gaap_ProceedsFromOtherDeposits_265F0D44FD8C83418E1872AF8BD2EEA8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted" xlink:label="loc_us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted_FF6E18CFA84AAC05EE6672AF8BD2D741" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_5DA1F2D124EA11A1CDBD72AF8BD289E1" xlink:to="loc_us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted_FF6E18CFA84AAC05EE6672AF8BD2D741" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDue" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_63076ED49E1C921EE1D172AF8BD2C302" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_5DA1F2D124EA11A1CDBD72AF8BD289E1" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_63076ED49E1C921EE1D172AF8BD2C302" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AreaOfRealEstateProperty" xlink:label="loc_us-gaap_AreaOfRealEstateProperty_B17EC9B68399C097AC0F72AF8BD21E5D" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_5DA1F2D124EA11A1CDBD72AF8BD289E1" xlink:to="loc_us-gaap_AreaOfRealEstateProperty_B17EC9B68399C097AC0F72AF8BD21E5D" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/ConsolidatedBalanceSheets" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="loc_us-gaap_StatementOfFinancialPositionAbstract_10767C4E2AF2AC986B9C730C09BE6EF0" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="loc_us-gaap_AssetsAbstract_39C8EBFE8E7E02AE12D6730C09BE382B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_10767C4E2AF2AC986B9C730C09BE6EF0" xlink:to="loc_us-gaap_AssetsAbstract_39C8EBFE8E7E02AE12D6730C09BE382B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="loc_us-gaap_AssetsCurrentAbstract_616D80BDB9B283963C84730C09BEEEEF" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_39C8EBFE8E7E02AE12D6730C09BE382B" xlink:to="loc_us-gaap_AssetsCurrentAbstract_616D80BDB9B283963C84730C09BEEEEF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_28985E4DFAE386F603F6730C09BE0149" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_616D80BDB9B283963C84730C09BEEEEF" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_28985E4DFAE386F603F6730C09BE0149" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_C240240978A26EEA8B2B730C09BE694A" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_616D80BDB9B283963C84730C09BEEEEF" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_C240240978A26EEA8B2B730C09BE694A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CostsInExcessOfBillingsOnUncompletedContractsOrProgramsExpectedToBeCollectedWithinOneYear" xlink:label="loc_us-gaap_CostsInExcessOfBillingsOnUncompletedContractsOrProgramsExpectedToBeCollectedWithinOneYear_81AAEA06D6613DC98208730C09BE60DF" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_616D80BDB9B283963C84730C09BEEEEF" xlink:to="loc_us-gaap_CostsInExcessOfBillingsOnUncompletedContractsOrProgramsExpectedToBeCollectedWithinOneYear_81AAEA06D6613DC98208730C09BE60DF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InventoryNet" xlink:label="loc_us-gaap_InventoryNet_AB9AA75DBC697FD1D96D730C09BE55FC" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_616D80BDB9B283963C84730C09BEEEEF" xlink:to="loc_us-gaap_InventoryNet_AB9AA75DBC697FD1D96D730C09BE55FC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredTaxAssetsNetCurrent" xlink:label="loc_us-gaap_DeferredTaxAssetsNetCurrent_C6BE19C5D4EE0C720D19730C09BE3E86" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_616D80BDB9B283963C84730C09BEEEEF" xlink:to="loc_us-gaap_DeferredTaxAssetsNetCurrent_C6BE19C5D4EE0C720D19730C09BE3E86" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PrepaidTaxes" xlink:label="loc_us-gaap_PrepaidTaxes_A1E79A703933770CE74C730C09BE952F" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_616D80BDB9B283963C84730C09BEEEEF" xlink:to="loc_us-gaap_PrepaidTaxes_A1E79A703933770CE74C730C09BE952F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_C7C3CDAF1B434C54A6B8730C09BE34E7" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_616D80BDB9B283963C84730C09BEEEEF" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_C7C3CDAF1B434C54A6B8730C09BE34E7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="loc_us-gaap_AssetsCurrent_CA27831356C3CF22C13C730C09BE4D42" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_616D80BDB9B283963C84730C09BEEEEF" xlink:to="loc_us-gaap_AssetsCurrent_CA27831356C3CF22C13C730C09BE4D42" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsNoncurrent" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsNoncurrent_BA72441C741D307E1F74730C09BE1618" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_39C8EBFE8E7E02AE12D6730C09BE382B" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsNoncurrent_BA72441C741D307E1F74730C09BE1618" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_26B996FF070A64B9C4C3730C09BE4538" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_39C8EBFE8E7E02AE12D6730C09BE382B" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_26B996FF070A64B9C4C3730C09BE4538" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_EC6D9A1BFB9AA5C5B240730C09BE915B" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_39C8EBFE8E7E02AE12D6730C09BE382B" xlink:to="loc_us-gaap_Goodwill_EC6D9A1BFB9AA5C5B240730C09BE915B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_B3629A14E1313932BA18730C09BEB9C3" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_39C8EBFE8E7E02AE12D6730C09BE382B" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_B3629A14E1313932BA18730C09BEB9C3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_DCF7428BA2D61ABDBC1A730C09BE0BF1" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_39C8EBFE8E7E02AE12D6730C09BE382B" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_DCF7428BA2D61ABDBC1A730C09BE0BF1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_8D6169E52B6A3D9A621E730C09BE376F" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_39C8EBFE8E7E02AE12D6730C09BE382B" xlink:to="loc_us-gaap_Assets_8D6169E52B6A3D9A621E730C09BE376F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_C96B2866FF012E636C7A730C09BEE854" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_10767C4E2AF2AC986B9C730C09BE6EF0" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_C96B2866FF012E636C7A730C09BEE854" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract_DFD4A0B8E1914EF54FBD730C09BECDBC" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_C96B2866FF012E636C7A730C09BEE854" xlink:to="loc_us-gaap_LiabilitiesCurrentAbstract_DFD4A0B8E1914EF54FBD730C09BECDBC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccountsPayableCurrent" xlink:label="loc_us-gaap_AccountsPayableCurrent_7F2D80C8AE6742962230730C09BE05C6" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_DFD4A0B8E1914EF54FBD730C09BECDBC" xlink:to="loc_us-gaap_AccountsPayableCurrent_7F2D80C8AE6742962230730C09BE05C6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_4AC1103556994E6371D6730C09BE8773" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_DFD4A0B8E1914EF54FBD730C09BECDBC" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_4AC1103556994E6371D6730C09BE8773" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_227DD3BBC43EADF6852A730C09BE5C65" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_DFD4A0B8E1914EF54FBD730C09BECDBC" xlink:to="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_227DD3BBC43EADF6852A730C09BE5C65" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredRevenueCurrent" xlink:label="loc_us-gaap_DeferredRevenueCurrent_96381B11837CAE792833730C09BE4E69" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_DFD4A0B8E1914EF54FBD730C09BECDBC" xlink:to="loc_us-gaap_DeferredRevenueCurrent_96381B11837CAE792833730C09BE4E69" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="loc_us-gaap_LiabilitiesCurrent_DCDB1631D8D8AD11C398730C09BECDD3" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_DFD4A0B8E1914EF54FBD730C09BECDBC" xlink:to="loc_us-gaap_LiabilitiesCurrent_DCDB1631D8D8AD11C398730C09BECDD3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SaleLeasebackTransactionDeferredGainNet" xlink:label="loc_us-gaap_SaleLeasebackTransactionDeferredGainNet_35DF6F917627A7101B74730C09BEAAF9" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_C96B2866FF012E636C7A730C09BEE854" xlink:to="loc_us-gaap_SaleLeasebackTransactionDeferredGainNet_35DF6F917627A7101B74730C09BEAAF9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredTaxLiabilitiesNoncurrent" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesNoncurrent_E21531CE3F0BFF106A6D730C09BE84C9" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_C96B2866FF012E636C7A730C09BEE854" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesNoncurrent_E21531CE3F0BFF106A6D730C09BE84C9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccruedIncomeTaxesNoncurrent" xlink:label="loc_us-gaap_AccruedIncomeTaxesNoncurrent_3C24157EBD8113A0AA28730C09BE52D4" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_C96B2866FF012E636C7A730C09BEE854" xlink:to="loc_us-gaap_AccruedIncomeTaxesNoncurrent_3C24157EBD8113A0AA28730C09BE52D4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_CB49670C49A4BC884DDE730C09BEFA87" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_C96B2866FF012E636C7A730C09BEE854" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_CB49670C49A4BC884DDE730C09BEFA87" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_Liabilities" xlink:label="loc_us-gaap_Liabilities_CADAC9AC2AC4CAADC74A730C09BE9304" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_C96B2866FF012E636C7A730C09BEE854" xlink:to="loc_us-gaap_Liabilities_CADAC9AC2AC4CAADC74A730C09BE9304" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="loc_us-gaap_CommitmentsAndContingencies_3812DCA81D4439DA0A0F730C09BEABAF" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_C96B2866FF012E636C7A730C09BEE854" xlink:to="loc_us-gaap_CommitmentsAndContingencies_3812DCA81D4439DA0A0F730C09BEABAF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="loc_us-gaap_StockholdersEquityAbstract_239EECE055AD5BECCE8D730C09BEA659" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_C96B2866FF012E636C7A730C09BEE854" xlink:to="loc_us-gaap_StockholdersEquityAbstract_239EECE055AD5BECCE8D730C09BEA659" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PreferredStockValue" xlink:label="loc_us-gaap_PreferredStockValue_272D39F26F6446A5002F730C09BE9285" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_239EECE055AD5BECCE8D730C09BEA659" xlink:to="loc_us-gaap_PreferredStockValue_272D39F26F6446A5002F730C09BE9285" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CommonStockValue" xlink:label="loc_us-gaap_CommonStockValue_8A7BEA5B4B01147B458C730C09BE40BE" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_239EECE055AD5BECCE8D730C09BEA659" xlink:to="loc_us-gaap_CommonStockValue_8A7BEA5B4B01147B458C730C09BE40BE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AdditionalPaidInCapital" xlink:label="loc_us-gaap_AdditionalPaidInCapital_EEAA680D9AE685FD45EB730C09BEBDF3" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_239EECE055AD5BECCE8D730C09BEA659" xlink:to="loc_us-gaap_AdditionalPaidInCapital_EEAA680D9AE685FD45EB730C09BEBDF3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_823EE12B77677DE69791730C09BE92D9" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_239EECE055AD5BECCE8D730C09BEA659" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_823EE12B77677DE69791730C09BE92D9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_1303008AB03298C0205F730C09BEF667" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_239EECE055AD5BECCE8D730C09BEA659" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_1303008AB03298C0205F730C09BEF667" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_4A69FF4E2125F6EF6A01730C09BE5E46" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_239EECE055AD5BECCE8D730C09BEA659" xlink:to="loc_us-gaap_StockholdersEquity_4A69FF4E2125F6EF6A01730C09BE5E46" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_A6F3B5C6585E34DB2D67730C09BEDB81" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_C96B2866FF012E636C7A730C09BEE854" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquity_A6F3B5C6585E34DB2D67730C09BEDB81" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="loc_us-gaap_StatementOfFinancialPositionAbstract_F6186C045F39EE029141731BE6ADF179" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_8491AB25A8191C8DC1DE731BE6AD2750" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_F6186C045F39EE029141731BE6ADF179" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_8491AB25A8191C8DC1DE731BE6AD2750" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PreferredStockParOrStatedValuePerShare" xlink:label="loc_us-gaap_PreferredStockParOrStatedValuePerShare_A8AA29B3F663409D6345731BE6AE44F7" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_F6186C045F39EE029141731BE6ADF179" xlink:to="loc_us-gaap_PreferredStockParOrStatedValuePerShare_A8AA29B3F663409D6345731BE6AE44F7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PreferredStockSharesAuthorized" xlink:label="loc_us-gaap_PreferredStockSharesAuthorized_42366361E834F8E0171E731BE6AEB22D" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_F6186C045F39EE029141731BE6ADF179" xlink:to="loc_us-gaap_PreferredStockSharesAuthorized_42366361E834F8E0171E731BE6AEB22D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PreferredStockSharesIssued" xlink:label="loc_us-gaap_PreferredStockSharesIssued_D2247E29570AF1FBB17C731BE6AE3205" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_F6186C045F39EE029141731BE6ADF179" xlink:to="loc_us-gaap_PreferredStockSharesIssued_D2247E29570AF1FBB17C731BE6AE3205" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PreferredStockSharesOutstanding" xlink:label="loc_us-gaap_PreferredStockSharesOutstanding_03A3455831754C783D94731BE6AE3D11" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_F6186C045F39EE029141731BE6ADF179" xlink:to="loc_us-gaap_PreferredStockSharesOutstanding_03A3455831754C783D94731BE6AE3D11" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_245ED90BAEEA621C2DC4731BE6AEA757" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_F6186C045F39EE029141731BE6ADF179" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_245ED90BAEEA621C2DC4731BE6AEA757" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CommonStockSharesAuthorized" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_37DD5F58D4CEC9DD6B63731BE6AF7772" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_F6186C045F39EE029141731BE6ADF179" xlink:to="loc_us-gaap_CommonStockSharesAuthorized_37DD5F58D4CEC9DD6B63731BE6AF7772" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CommonStockSharesIssued" xlink:label="loc_us-gaap_CommonStockSharesIssued_9D7491435D6E8DCE53E9731BE6AF4B3C" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_F6186C045F39EE029141731BE6ADF179" xlink:to="loc_us-gaap_CommonStockSharesIssued_9D7491435D6E8DCE53E9731BE6AF4B3C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_74C9223E1176C3E9A846731BE6AF2645" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_F6186C045F39EE029141731BE6ADF179" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_74C9223E1176C3E9A846731BE6AF2645" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/ConsolidatedStatementsOfCashFlows" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementOfCashFlowsAbstract" xlink:label="loc_us-gaap_StatementOfCashFlowsAbstract_7DB3A0DB71EAD06AB5167A2D82181622" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_5A9D70F1DB7B769856D87A2D8218CF02" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_7DB3A0DB71EAD06AB5167A2D82181622" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_5A9D70F1DB7B769856D87A2D8218CF02" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_F1AA09B290607F3E7D2F7A2D82181C36" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_5A9D70F1DB7B769856D87A2D8218CF02" xlink:to="loc_us-gaap_NetIncomeLoss_F1AA09B290607F3E7D2F7A2D82181C36" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_74357C4FDD69EE523D127A2D82198399" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_5A9D70F1DB7B769856D87A2D8218CF02" xlink:to="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_74357C4FDD69EE523D127A2D82198399" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_14660D7340996E14ABCB7A2D821977E7" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_74357C4FDD69EE523D127A2D82198399" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_14660D7340996E14ABCB7A2D821977E7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_us-gaap_ShareBasedCompensation_57AD734C8ADC91BAC5D97A2D8219D8A5" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_74357C4FDD69EE523D127A2D82198399" xlink:to="loc_us-gaap_ShareBasedCompensation_57AD734C8ADC91BAC5D97A2D8219D8A5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_11F0C33632DA7107E90D7A2D82198A06" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_74357C4FDD69EE523D127A2D82198399" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_11F0C33632DA7107E90D7A2D82198A06" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetImpairment" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetImpairment_19E1010C98269EA31DF47A2D8219FB56" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_74357C4FDD69EE523D127A2D82198399" xlink:to="loc_us-gaap_GoodwillAndIntangibleAssetImpairment_19E1010C98269EA31DF47A2D8219FB56" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities" xlink:label="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities_8956882461A0323F27717A2D821A9D9E" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_74357C4FDD69EE523D127A2D82198399" xlink:to="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities_8956882461A0323F27717A2D821A9D9E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax" xlink:label="loc_us-gaap_DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax_E49415BCB74A1A9855EE7A2D821A4B6E" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_74357C4FDD69EE523D127A2D82198399" xlink:to="loc_us-gaap_DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax_E49415BCB74A1A9855EE7A2D821A4B6E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherNoncashIncomeExpense" xlink:label="loc_us-gaap_OtherNoncashIncomeExpense_1CF2B302342B495C14A37A2D821AFC28" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_74357C4FDD69EE523D127A2D82198399" xlink:to="loc_us-gaap_OtherNoncashIncomeExpense_1CF2B302342B495C14A37A2D821AFC28" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_1811DA3A69C396A9A9227A2D821A0DDD" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_74357C4FDD69EE523D127A2D82198399" xlink:to="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_1811DA3A69C396A9A9227A2D821A0DDD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_72E2AFF6A00E5AE6EFA87A2D821A2026" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_1811DA3A69C396A9A9227A2D821A0DDD" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_72E2AFF6A00E5AE6EFA87A2D821A2026" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncreaseDecreaseInInventories" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_6207B9ACA58C4EA60CEA7A2D821BEA2B" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_1811DA3A69C396A9A9227A2D821A0DDD" xlink:to="loc_us-gaap_IncreaseDecreaseInInventories_6207B9ACA58C4EA60CEA7A2D821BEA2B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidTaxes" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidTaxes_C87125566581CCF8EEC67A2D821B4430" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_1811DA3A69C396A9A9227A2D821A0DDD" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidTaxes_C87125566581CCF8EEC67A2D821B4430" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidExpense" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidExpense_CB4E5C30BAB717C49E7B7A2D821B0642" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_1811DA3A69C396A9A9227A2D821A0DDD" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidExpense_CB4E5C30BAB717C49E7B7A2D821B0642" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncreaseDecreaseInOtherNoncurrentAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentAssets_2E07821F35EB7EB67CC37A2D821B453B" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_1811DA3A69C396A9A9227A2D821A0DDD" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentAssets_2E07821F35EB7EB67CC37A2D821B453B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_5FD69FD2532F307682A67A2D821C93FA" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_1811DA3A69C396A9A9227A2D821A0DDD" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_5FD69FD2532F307682A67A2D821C93FA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncreaseDecreaseInDeferredRevenueAndCustomerAdvancesAndDeposits" xlink:label="loc_us-gaap_IncreaseDecreaseInDeferredRevenueAndCustomerAdvancesAndDeposits_D3885CDCC0C8665353837A2D821C2B8E" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_1811DA3A69C396A9A9227A2D821A0DDD" xlink:to="loc_us-gaap_IncreaseDecreaseInDeferredRevenueAndCustomerAdvancesAndDeposits_D3885CDCC0C8665353837A2D821C2B8E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_C4658582BD9144CC60247A2D821C3636" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_1811DA3A69C396A9A9227A2D821A0DDD" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_C4658582BD9144CC60247A2D821C3636" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities_9CC9F6097D05D1B5C9F17A2D821CA5D5" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_1811DA3A69C396A9A9227A2D821A0DDD" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities_9CC9F6097D05D1B5C9F17A2D821CA5D5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ED7DD695C9A5320CAB377A2D821CE233" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_5A9D70F1DB7B769856D87A2D8218CF02" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ED7DD695C9A5320CAB377A2D821CE233" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_3258ABC0266538342DE87A2D821C1992" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_7DB3A0DB71EAD06AB5167A2D82181622" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_3258ABC0266538342DE87A2D821C1992" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_B8BC06E67C7F318D0F477A2D821C9BAB" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_3258ABC0266538342DE87A2D821C1992" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_B8BC06E67C7F318D0F477A2D821C9BAB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_862C14F5071020A800507A2D821D6A4F" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_3258ABC0266538342DE87A2D821C1992" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_862C14F5071020A800507A2D821D6A4F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ProceedsFromDivestitureOfBusinesses" xlink:label="loc_us-gaap_ProceedsFromDivestitureOfBusinesses_3040481940288DEEF75D7A2D821D8D58" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_3258ABC0266538342DE87A2D821C1992" xlink:to="loc_us-gaap_ProceedsFromDivestitureOfBusinesses_3040481940288DEEF75D7A2D821D8D58" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PaymentsForProceedsFromOtherInvestingActivities" xlink:label="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_05571FF085B589D1C06C7A2D821DCD32" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_3258ABC0266538342DE87A2D821C1992" xlink:to="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_05571FF085B589D1C06C7A2D821DCD32" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_84CA8615649F93AC871C7A2D821DF625" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_3258ABC0266538342DE87A2D821C1992" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_84CA8615649F93AC871C7A2D821DF625" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_249CAF2E04B9DB4325F97A2D821D78A3" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_7DB3A0DB71EAD06AB5167A2D82181622" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_249CAF2E04B9DB4325F97A2D821D78A3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ProceedsFromStockOptionsExercised" xlink:label="loc_us-gaap_ProceedsFromStockOptionsExercised_44D6B96B043866C0C0587A2D821D5D36" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_249CAF2E04B9DB4325F97A2D821D78A3" xlink:to="loc_us-gaap_ProceedsFromStockOptionsExercised_44D6B96B043866C0C0587A2D821D5D36" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_1668FA673E0680081A5E7A2D821E6074" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_249CAF2E04B9DB4325F97A2D821D78A3" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_1668FA673E0680081A5E7A2D821E6074" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities" xlink:label="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_9778C474521A01AD591B7A2D821E0152" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_249CAF2E04B9DB4325F97A2D821D78A3" xlink:to="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_9778C474521A01AD591B7A2D821E0152" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations" xlink:label="loc_us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations_B5549684523E1F9179C37A2D821E7004" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_249CAF2E04B9DB4325F97A2D821D78A3" xlink:to="loc_us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations_B5549684523E1F9179C37A2D821E7004" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_A8B1134BBD5D288F45077A2D821FB1B0" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_249CAF2E04B9DB4325F97A2D821D78A3" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_A8B1134BBD5D288F45077A2D821FB1B0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents" xlink:label="loc_us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents_3415F51A79852B398F0D7A2D821F88F6" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_7DB3A0DB71EAD06AB5167A2D82181622" xlink:to="loc_us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents_3415F51A79852B398F0D7A2D821F88F6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_1032EE00808FB786D61E7A2D821F5944" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_7DB3A0DB71EAD06AB5167A2D82181622" xlink:to="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_1032EE00808FB786D61E7A2D821F5944" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_07C8191CFF04E4E050917A2D821F9EE9" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_7DB3A0DB71EAD06AB5167A2D82181622" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_07C8191CFF04E4E050917A2D821F9EE9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_FBD1FBA384B4504A0BF27A2D821FE1C7" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_7DB3A0DB71EAD06AB5167A2D82181622" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_FBD1FBA384B4504A0BF27A2D821FE1C7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SupplementalCashFlowInformationAbstract" xlink:label="loc_us-gaap_SupplementalCashFlowInformationAbstract_D2B29603A29CF3F0A1CB7A2D821F7E7A" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_7DB3A0DB71EAD06AB5167A2D82181622" xlink:to="loc_us-gaap_SupplementalCashFlowInformationAbstract_D2B29603A29CF3F0A1CB7A2D821F7E7A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InterestPaid" xlink:label="loc_us-gaap_InterestPaid_12CA4EB37C4E250BC3FE7A2D8220ACAF" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SupplementalCashFlowInformationAbstract_D2B29603A29CF3F0A1CB7A2D821F7E7A" xlink:to="loc_us-gaap_InterestPaid_12CA4EB37C4E250BC3FE7A2D8220ACAF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxesPaidNet" xlink:label="loc_us-gaap_IncomeTaxesPaidNet_87C0CB562EA18F0654D07A2D82208101" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SupplementalCashFlowInformationAbstract_D2B29603A29CF3F0A1CB7A2D821F7E7A" xlink:to="loc_us-gaap_IncomeTaxesPaidNet_87C0CB562EA18F0654D07A2D82208101" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract" xlink:label="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_F6AD6F9939682AFC46AD7A2D8220C0E1" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_7DB3A0DB71EAD06AB5167A2D82181622" xlink:to="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_F6AD6F9939682AFC46AD7A2D8220C0E1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StockIssued1" xlink:label="loc_us-gaap_StockIssued1_E05A03AF5E861AA937927A2D82202A7A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_F6AD6F9939682AFC46AD7A2D8220C0E1" xlink:to="loc_us-gaap_StockIssued1_E05A03AF5E861AA937927A2D82202A7A" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/ConsolidatedStatementsOfOperationsAndComprehensiveLoss" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeStatementAbstract" xlink:label="loc_us-gaap_IncomeStatementAbstract_022A92643AFB29C1777E4EF572760FD9" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues_ACA16A33DE19C59B4B904EF5727664F3" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_022A92643AFB29C1777E4EF572760FD9" xlink:to="loc_us-gaap_Revenues_ACA16A33DE19C59B4B904EF5727664F3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CostOfRevenue" xlink:label="loc_us-gaap_CostOfRevenue_88DA00EEAD70DB98027C4EF572769433" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_022A92643AFB29C1777E4EF572760FD9" xlink:to="loc_us-gaap_CostOfRevenue_88DA00EEAD70DB98027C4EF572769433" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_GrossProfit" xlink:label="loc_us-gaap_GrossProfit_C31477E8F3E4F1EE5B914EF572763379" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_022A92643AFB29C1777E4EF572760FD9" xlink:to="loc_us-gaap_GrossProfit_C31477E8F3E4F1EE5B914EF572763379" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OperatingExpensesAbstract" xlink:label="loc_us-gaap_OperatingExpensesAbstract_1DD3388DC1FB588ACA104EF57276FF0B" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_022A92643AFB29C1777E4EF572760FD9" xlink:to="loc_us-gaap_OperatingExpensesAbstract_1DD3388DC1FB588ACA104EF57276FF0B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpense" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_AD60D6D153A52BE432714EF57276EF7F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_1DD3388DC1FB588ACA104EF57276FF0B" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_AD60D6D153A52BE432714EF57276EF7F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ResearchAndDevelopmentExpense" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_C516015A0DBF950912364EF57277BC25" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_1DD3388DC1FB588ACA104EF57276FF0B" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpense_C516015A0DBF950912364EF57277BC25" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_97C151659BEBEFCEA0104EF572772BEC" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_1DD3388DC1FB588ACA104EF57276FF0B" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_97C151659BEBEFCEA0104EF572772BEC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RestructuringCharges" xlink:label="loc_us-gaap_RestructuringCharges_0D416D9CB06D570302614EF572771F22" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_1DD3388DC1FB588ACA104EF57276FF0B" xlink:to="loc_us-gaap_RestructuringCharges_0D416D9CB06D570302614EF572771F22" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ImpairmentOfIntangibleAssetsFinitelived" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsFinitelived_758061CA44D23E2B76274EF572770D92" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_1DD3388DC1FB588ACA104EF57276FF0B" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetsFinitelived_758061CA44D23E2B76274EF572770D92" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationAcquisitionRelatedCosts" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_FE8AC1B23B2BAB2A7CB94EF57277279A" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_1DD3388DC1FB588ACA104EF57276FF0B" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_FE8AC1B23B2BAB2A7CB94EF57277279A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OperatingExpenses" xlink:label="loc_us-gaap_OperatingExpenses_1E8EB4DD2E3F19701A994EF572774044" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_1DD3388DC1FB588ACA104EF57276FF0B" xlink:to="loc_us-gaap_OperatingExpenses_1E8EB4DD2E3F19701A994EF572774044" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_26872B2AD1B00B9ACBEE4EF572779280" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_022A92643AFB29C1777E4EF572760FD9" xlink:to="loc_us-gaap_OperatingIncomeLoss_26872B2AD1B00B9ACBEE4EF572779280" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InvestmentIncomeInterest" xlink:label="loc_us-gaap_InvestmentIncomeInterest_B73B5C60FF8EDBE921AE4EF572775553" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_022A92643AFB29C1777E4EF572760FD9" xlink:to="loc_us-gaap_InvestmentIncomeInterest_B73B5C60FF8EDBE921AE4EF572775553" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InterestExpense" xlink:label="loc_us-gaap_InterestExpense_21F0C43E8897ACECC75D4EF5727736DA" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_022A92643AFB29C1777E4EF572760FD9" xlink:to="loc_us-gaap_InterestExpense_21F0C43E8897ACECC75D4EF5727736DA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_BE3E9EF74337AA9B10B44EF572770E17" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_022A92643AFB29C1777E4EF572760FD9" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_BE3E9EF74337AA9B10B44EF572770E17" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_61A9F482732D74D039B94EF572777E73" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_022A92643AFB29C1777E4EF572760FD9" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_61A9F482732D74D039B94EF572777E73" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_834F764444E3C72856594EF57277BC75" xlink:type="locator" />
    <presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_022A92643AFB29C1777E4EF572760FD9" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_834F764444E3C72856594EF57277BC75" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeLossFromContinuingOperations" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperations_56E09495A63EBFA5F3064EF5727786F4" xlink:type="locator" />
    <presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_022A92643AFB29C1777E4EF572760FD9" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperations_56E09495A63EBFA5F3064EF5727786F4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity" xlink:label="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity_3050728C022789B82D804EF57277A1CB" xlink:type="locator" />
    <presentationArc order="12" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_022A92643AFB29C1777E4EF572760FD9" xlink:to="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity_3050728C022789B82D804EF57277A1CB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_56274F4524F7838868964EF57277F0B7" xlink:type="locator" />
    <presentationArc order="13" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_022A92643AFB29C1777E4EF572760FD9" xlink:to="loc_us-gaap_NetIncomeLoss_56274F4524F7838868964EF57277F0B7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsPerBasicShare" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_45C5A5CBEBB0B7EC35514EF572775C9B" xlink:type="locator" />
    <presentationArc order="14" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_022A92643AFB29C1777E4EF572760FD9" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_45C5A5CBEBB0B7EC35514EF572775C9B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare" xlink:label="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare_38079569B15F6CC44F194EF57277EF0E" xlink:type="locator" />
    <presentationArc order="15" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_022A92643AFB29C1777E4EF572760FD9" xlink:to="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare_38079569B15F6CC44F194EF57277EF0E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="loc_us-gaap_EarningsPerShareBasic_48FBCE30BD8E933125A14EF57277A728" xlink:type="locator" />
    <presentationArc order="16" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_022A92643AFB29C1777E4EF572760FD9" xlink:to="loc_us-gaap_EarningsPerShareBasic_48FBCE30BD8E933125A14EF57277A728" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_31AFC6AB5E8DC678535A4EF57277EDA8" xlink:type="locator" />
    <presentationArc order="17" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_022A92643AFB29C1777E4EF572760FD9" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_31AFC6AB5E8DC678535A4EF57277EDA8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare" xlink:label="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare_515743E4BD003705DC984EF572776EAE" xlink:type="locator" />
    <presentationArc order="18" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_022A92643AFB29C1777E4EF572760FD9" xlink:to="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare_515743E4BD003705DC984EF572776EAE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="loc_us-gaap_EarningsPerShareDiluted_EF6DDB4226EF05302D5B4EF5727778B6" xlink:type="locator" />
    <presentationArc order="19" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_022A92643AFB29C1777E4EF572760FD9" xlink:to="loc_us-gaap_EarningsPerShareDiluted_EF6DDB4226EF05302D5B4EF5727778B6" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_WeightedAverageNumberBasicAndDilutedSharesOutstandingAbstract" xlink:label="loc_mrcy_WeightedAverageNumberBasicAndDilutedSharesOutstandingAbstract_CD2C9D1FC1204A6C300E4EF572788322" xlink:type="locator" />
    <presentationArc order="20" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_022A92643AFB29C1777E4EF572760FD9" xlink:to="loc_mrcy_WeightedAverageNumberBasicAndDilutedSharesOutstandingAbstract_CD2C9D1FC1204A6C300E4EF572788322" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_9B565940423C59F2DA004EF57278FE28" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mrcy_WeightedAverageNumberBasicAndDilutedSharesOutstandingAbstract_CD2C9D1FC1204A6C300E4EF572788322" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_9B565940423C59F2DA004EF57278FE28" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_0F85D45F976CA1667ACA4EF572788FE3" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mrcy_WeightedAverageNumberBasicAndDilutedSharesOutstandingAbstract_CD2C9D1FC1204A6C300E4EF572788322" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_0F85D45F976CA1667ACA4EF572788FE3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxAbstract" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_90908F223561767A1B8E4EF572783F77" xlink:type="locator" />
    <presentationArc order="21" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_022A92643AFB29C1777E4EF572760FD9" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_90908F223561767A1B8E4EF572783F77" xlink:type="arc" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_90908F223561767A1B8E4EF572783F77" xlink:to="loc_us-gaap_NetIncomeLoss_56274F4524F7838868964EF57277F0B7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_102B4DAC2812A8E07A5C4EF5727825FF" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_90908F223561767A1B8E4EF572783F77" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_102B4DAC2812A8E07A5C4EF5727825FF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_CEB396DDB8808AA03AA94EF572785C42" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_90908F223561767A1B8E4EF572783F77" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTax_CEB396DDB8808AA03AA94EF572785C42" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/Debt" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="loc_us-gaap_DebtDisclosureAbstract_BC4D4029D91DE8BB5847D0F935C8EAF2" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DebtDisclosureTextBlock" xlink:label="loc_us-gaap_DebtDisclosureTextBlock_215745DDC0A5D090F9AED0F935C8CFFA" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtDisclosureAbstract_BC4D4029D91DE8BB5847D0F935C8EAF2" xlink:to="loc_us-gaap_DebtDisclosureTextBlock_215745DDC0A5D090F9AED0F935C8CFFA" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/DebtAdditionalInformationDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="loc_us-gaap_DebtDisclosureAbstract_FCC385853E56C27BDAE07A2D7FC4DB48" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="loc_us-gaap_DebtInstrumentTable_D7A186967A0B716C0CC87A2D7FC4C705" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtDisclosureAbstract_FCC385853E56C27BDAE07A2D7FC4DB48" xlink:to="loc_us-gaap_DebtInstrumentTable_D7A186967A0B716C0CC87A2D7FC4C705" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_3C0F117A68C8BC3B2F567A41562DC709" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_D7A186967A0B716C0CC87A2D7FC4C705" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_3C0F117A68C8BC3B2F567A41562DC709" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_B989B7EEF64DD5523AD47A422C2EF3DE" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_3C0F117A68C8BC3B2F567A41562DC709" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_B989B7EEF64DD5523AD47A422C2EF3DE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SecuredDebtMember" xlink:label="loc_us-gaap_SecuredDebtMember_E6434F263EA55C7FA2BB7A42ADD059F6" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_B989B7EEF64DD5523AD47A422C2EF3DE" xlink:to="loc_us-gaap_SecuredDebtMember_E6434F263EA55C7FA2BB7A42ADD059F6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="loc_us-gaap_DebtInstrumentAxis_77E6A3CD5F64A8DADBCE7A412E07185E" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_D7A186967A0B716C0CC87A2D7FC4C705" xlink:to="loc_us-gaap_DebtInstrumentAxis_77E6A3CD5F64A8DADBCE7A412E07185E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_FAC3F0C7263279CBF5097A412E3461CB" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentAxis_77E6A3CD5F64A8DADBCE7A412E07185E" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_FAC3F0C7263279CBF5097A412E3461CB" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_TermLoanAMember" xlink:label="loc_mrcy_TermLoanAMember_ED948763EC4903EE79C57A41DB7C0418" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_FAC3F0C7263279CBF5097A412E3461CB" xlink:to="loc_mrcy_TermLoanAMember_ED948763EC4903EE79C57A41DB7C0418" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_6BC8AF3FEDC57D561A197A2D7FC4F068" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_D7A186967A0B716C0CC87A2D7FC4C705" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_6BC8AF3FEDC57D561A197A2D7FC4F068" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_5503B339C6241F8675C07A2D7FC51B01" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_6BC8AF3FEDC57D561A197A2D7FC4F068" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_5503B339C6241F8675C07A2D7FC51B01" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SubsequentEventMember" xlink:label="loc_us-gaap_SubsequentEventMember_4A315C336F4B6A85F28C7A2D7FC54852" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_5503B339C6241F8675C07A2D7FC51B01" xlink:to="loc_us-gaap_SubsequentEventMember_4A315C336F4B6A85F28C7A2D7FC54852" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CreditFacilityAxis" xlink:label="loc_us-gaap_CreditFacilityAxis_1E311E6CECCADAB07CEB7A2D7FC54F7B" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_D7A186967A0B716C0CC87A2D7FC4C705" xlink:to="loc_us-gaap_CreditFacilityAxis_1E311E6CECCADAB07CEB7A2D7FC54F7B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_7DB98D0553AF5A87EEEA7A2D7FC5474F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CreditFacilityAxis_1E311E6CECCADAB07CEB7A2D7FC54F7B" xlink:to="loc_us-gaap_CreditFacilityDomain_7DB98D0553AF5A87EEEA7A2D7FC5474F" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_KeyBankCreditFacilityMember" xlink:label="loc_mrcy_KeyBankCreditFacilityMember_C679F003B2B14613D6E27A2D7FC513BB" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CreditFacilityDomain_7DB98D0553AF5A87EEEA7A2D7FC5474F" xlink:to="loc_mrcy_KeyBankCreditFacilityMember_C679F003B2B14613D6E27A2D7FC513BB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RevolvingCreditFacilityMember" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_7654E13AE28035B457E17A3F97EB016E" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CreditFacilityDomain_7DB98D0553AF5A87EEEA7A2D7FC5474F" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_7654E13AE28035B457E17A3F97EB016E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LineOfCreditFacilityAxis" xlink:label="loc_us-gaap_LineOfCreditFacilityAxis_93F82966D597EB7086497A2D7FC6B4FC" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_D7A186967A0B716C0CC87A2D7FC4C705" xlink:to="loc_us-gaap_LineOfCreditFacilityAxis_93F82966D597EB7086497A2D7FC6B4FC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LineOfCreditFacilityLenderDomain" xlink:label="loc_us-gaap_LineOfCreditFacilityLenderDomain_F1716EDB4C95F888B8FE7A2D7FC657EC" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityAxis_93F82966D597EB7086497A2D7FC6B4FC" xlink:to="loc_us-gaap_LineOfCreditFacilityLenderDomain_F1716EDB4C95F888B8FE7A2D7FC657EC" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_SeniorUnsecuredCreditFacilitiesMember" xlink:label="loc_mrcy_SeniorUnsecuredCreditFacilitiesMember_62A29A05429A3A907A327A2D7FC64415" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityLenderDomain_F1716EDB4C95F888B8FE7A2D7FC657EC" xlink:to="loc_mrcy_SeniorUnsecuredCreditFacilitiesMember_62A29A05429A3A907A327A2D7FC64415" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_3B717CD7F7C4E8B1921B7A2D7FC6F68D" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_D7A186967A0B716C0CC87A2D7FC4C705" xlink:to="loc_us-gaap_RangeAxis_3B717CD7F7C4E8B1921B7A2D7FC6F68D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_9DEE1429F19B70FB463A7A2D7FC7BAC6" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeAxis_3B717CD7F7C4E8B1921B7A2D7FC6F68D" xlink:to="loc_us-gaap_RangeMember_9DEE1429F19B70FB463A7A2D7FC7BAC6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_B8D949A514D8A3D3CF697A2D7FC7C941" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_9DEE1429F19B70FB463A7A2D7FC7BAC6" xlink:to="loc_us-gaap_MaximumMember_B8D949A514D8A3D3CF697A2D7FC7C941" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_431F62932057A3E3739A7A2D7FC861B7" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_D7A186967A0B716C0CC87A2D7FC4C705" xlink:to="loc_us-gaap_DebtInstrumentLineItems_431F62932057A3E3739A7A2D7FC861B7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_1EAA1C40CE787B1D232A7A2D7FC8ED5E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_431F62932057A3E3739A7A2D7FC861B7" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_1EAA1C40CE787B1D232A7A2D7FC8ED5E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_6B5BFD4FD1E636D6CA8A7A2D7FC85047" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_431F62932057A3E3739A7A2D7FC861B7" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_6B5BFD4FD1E636D6CA8A7A2D7FC85047" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LineOfCredit" xlink:label="loc_us-gaap_LineOfCredit_1CDE1E45E7595449B4A47A2D7FC8048D" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_431F62932057A3E3739A7A2D7FC861B7" xlink:to="loc_us-gaap_LineOfCredit_1CDE1E45E7595449B4A47A2D7FC8048D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LettersOfCreditOutstandingAmount" xlink:label="loc_us-gaap_LettersOfCreditOutstandingAmount_3F3911204499CDF930627A2D7FC8B113" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_431F62932057A3E3739A7A2D7FC861B7" xlink:to="loc_us-gaap_LettersOfCreditOutstandingAmount_3F3911204499CDF930627A2D7FC8B113" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_E0218B5EA321DE504C717A4439FBDB1D" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_431F62932057A3E3739A7A2D7FC861B7" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_E0218B5EA321DE504C717A4439FBDB1D" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/DescriptionOfBusiness" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_2069D8F218A044042E3ED0F9357A5C00" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NatureOfOperations" xlink:label="loc_us-gaap_NatureOfOperations_04CDCEEB5F986B0BD3ECD0F9357A252D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_2069D8F218A044042E3ED0F9357A5C00" xlink:to="loc_us-gaap_NatureOfOperations_04CDCEEB5F986B0BD3ECD0F9357A252D" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/DescriptionOfBusinessDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_8125E4C7258F77D12E93D0F933EA309D" xlink:type="locator" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_NatureofBusinessNumberofProgramsUsingProductsandServices" xlink:label="loc_mrcy_NatureofBusinessNumberofProgramsUsingProductsandServices_08E332C22A859D77A12BD0F933EA249B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_8125E4C7258F77D12E93D0F933EA309D" xlink:to="loc_mrcy_NatureofBusinessNumberofProgramsUsingProductsandServices_08E332C22A859D77A12BD0F933EA249B" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_NatureofBusinessNumberofContractorsUsingProductsandServices" xlink:label="loc_mrcy_NatureofBusinessNumberofContractorsUsingProductsandServices_2FB2C394D5728CACC8C3D0F933EAEDFC" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_8125E4C7258F77D12E93D0F933EA309D" xlink:to="loc_mrcy_NatureofBusinessNumberofContractorsUsingProductsandServices_2FB2C394D5728CACC8C3D0F933EAEDFC" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/DiscontinuedOperations" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DiscontinuedOperationsAndDisposalGroupsAbstract" xlink:label="loc_us-gaap_DiscontinuedOperationsAndDisposalGroupsAbstract_CD046530713A393F4CE6D0F9346D8ACC" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsDisclosureTextBlock" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsDisclosureTextBlock_F87346D3393502377ADBD0F9346D9E17" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DiscontinuedOperationsAndDisposalGroupsAbstract_CD046530713A393F4CE6D0F9346D8ACC" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsDisclosureTextBlock_F87346D3393502377ADBD0F9346D9E17" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/DiscontinuedOperationsDepreciationAmortizationCapitalExpendituresAndSignificantNoncashItemsDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DiscontinuedOperationsAndDisposalGroupsAbstract" xlink:label="loc_us-gaap_DiscontinuedOperationsAndDisposalGroupsAbstract_9B5541BB7D24E7B407F2D0F934870693" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_839DD3C0ED38F1682B05D0F93488A540" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DiscontinuedOperationsAndDisposalGroupsAbstract_9B5541BB7D24E7B407F2D0F934870693" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_839DD3C0ED38F1682B05D0F93488A540" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_7AF7375556BB9047DFC2D0F93488089D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_839DD3C0ED38F1682B05D0F93488A540" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_7AF7375556BB9047DFC2D0F93488089D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_0A6B32FC87215F205E08D0F934887690" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_7AF7375556BB9047DFC2D0F93488089D" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_0A6B32FC87215F205E08D0F934887690" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_MercuryIntelligenceSystemsBusinessUnitMember" xlink:label="loc_mrcy_MercuryIntelligenceSystemsBusinessUnitMember_B7B2517E4DFD67DBFBA6D0F934883608" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_0A6B32FC87215F205E08D0F934887690" xlink:to="loc_mrcy_MercuryIntelligenceSystemsBusinessUnitMember_B7B2517E4DFD67DBFBA6D0F934883608" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_B83D1F3F98E53F1206EAD0F934884193" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_839DD3C0ED38F1682B05D0F93488A540" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_B83D1F3F98E53F1206EAD0F934884193" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_DisposalGroupIncludingDiscontinuedOperationDepreciation" xlink:label="loc_mrcy_DisposalGroupIncludingDiscontinuedOperationDepreciation_BB1BB1AEF7383AF12E4ED0F93488B4F7" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_B83D1F3F98E53F1206EAD0F934884193" xlink:to="loc_mrcy_DisposalGroupIncludingDiscontinuedOperationDepreciation_BB1BB1AEF7383AF12E4ED0F93488B4F7" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_DisposalGroupIncludingDiscontinuedOperationAmortization" xlink:label="loc_mrcy_DisposalGroupIncludingDiscontinuedOperationAmortization_D952788CE17822881AF6D0F9348865AE" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_B83D1F3F98E53F1206EAD0F934884193" xlink:to="loc_mrcy_DisposalGroupIncludingDiscontinuedOperationAmortization_D952788CE17822881AF6D0F9348865AE" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_DisposalGroupIncludingDiscontinuedOperationImpairmentofGoodwill" xlink:label="loc_mrcy_DisposalGroupIncludingDiscontinuedOperationImpairmentofGoodwill_6060548F9620668BAC87D0F934889558" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_B83D1F3F98E53F1206EAD0F934884193" xlink:to="loc_mrcy_DisposalGroupIncludingDiscontinuedOperationImpairmentofGoodwill_6060548F9620668BAC87D0F934889558" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_DisposalGroupIncludingDiscontinuedOperationSharebasedCompensation" xlink:label="loc_mrcy_DisposalGroupIncludingDiscontinuedOperationSharebasedCompensation_677F42E75C656B6B3E35D0F93488BF4A" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_B83D1F3F98E53F1206EAD0F934884193" xlink:to="loc_mrcy_DisposalGroupIncludingDiscontinuedOperationSharebasedCompensation_677F42E75C656B6B3E35D0F93488BF4A" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/DiscontinuedOperationsLossIncomeFromDiscontinuedOperationsDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DiscontinuedOperationsAndDisposalGroupsAbstract" xlink:label="loc_us-gaap_DiscontinuedOperationsAndDisposalGroupsAbstract_CAE014B3A9633D5311F57A2D603A471E" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_41DAAEB84E677018DC047A2D603A64BE" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DiscontinuedOperationsAndDisposalGroupsAbstract_CAE014B3A9633D5311F57A2D603A471E" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_41DAAEB84E677018DC047A2D603A64BE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_90D2420FB2ECA77CC5F77A2D603BB0A7" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_41DAAEB84E677018DC047A2D603A64BE" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_90D2420FB2ECA77CC5F77A2D603BB0A7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_4E81CBB83B7BC87CAF117A2D603B5CCD" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_90D2420FB2ECA77CC5F77A2D603BB0A7" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_4E81CBB83B7BC87CAF117A2D603B5CCD" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_MercuryIntelligenceSystemsBusinessUnitMember" xlink:label="loc_mrcy_MercuryIntelligenceSystemsBusinessUnitMember_E4218E20DC1683FFD3C87A2D603B9D62" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_4E81CBB83B7BC87CAF117A2D603B5CCD" xlink:to="loc_mrcy_MercuryIntelligenceSystemsBusinessUnitMember_E4218E20DC1683FFD3C87A2D603B9D62" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_4D892081EC8C036AA24D7A2D603C7B5D" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_41DAAEB84E677018DC047A2D603A64BE" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_4D892081EC8C036AA24D7A2D603C7B5D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue_00D3F4BD4883D02464B17A2D603C271E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_4D892081EC8C036AA24D7A2D603C7B5D" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue_00D3F4BD4883D02464B17A2D603C271E" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_DisposalGroupIncludingDiscontinuedOperationCostsAbstract" xlink:label="loc_mrcy_DisposalGroupIncludingDiscontinuedOperationCostsAbstract_20BCC8C7B81F934B30417A2D603CD6B7" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_4D892081EC8C036AA24D7A2D603C7B5D" xlink:to="loc_mrcy_DisposalGroupIncludingDiscontinuedOperationCostsAbstract_20BCC8C7B81F934B30417A2D603CD6B7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold_D9FF02D90BAA8D54664E7A2D603E86EF" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mrcy_DisposalGroupIncludingDiscontinuedOperationCostsAbstract_20BCC8C7B81F934B30417A2D603CD6B7" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold_D9FF02D90BAA8D54664E7A2D603E86EF" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_DisposalGroupIncludingDiscontinuedOperationSellingGeneralandAdministrativeExpense" xlink:label="loc_mrcy_DisposalGroupIncludingDiscontinuedOperationSellingGeneralandAdministrativeExpense_88D8BA3C9277C8CB45C87A2D603E4D4A" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mrcy_DisposalGroupIncludingDiscontinuedOperationCostsAbstract_20BCC8C7B81F934B30417A2D603CD6B7" xlink:to="loc_mrcy_DisposalGroupIncludingDiscontinuedOperationSellingGeneralandAdministrativeExpense_88D8BA3C9277C8CB45C87A2D603E4D4A" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_DisposalGroupIncludingDiscontinuedOperationResearchandDevelopment" xlink:label="loc_mrcy_DisposalGroupIncludingDiscontinuedOperationResearchandDevelopment_E29CA7BC7BDB2378CDE97A2D603F7F9A" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mrcy_DisposalGroupIncludingDiscontinuedOperationCostsAbstract_20BCC8C7B81F934B30417A2D603CD6B7" xlink:to="loc_mrcy_DisposalGroupIncludingDiscontinuedOperationResearchandDevelopment_E29CA7BC7BDB2378CDE97A2D603F7F9A" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_DisposalGroupIncludingDiscontinuedOperationAmortization" xlink:label="loc_mrcy_DisposalGroupIncludingDiscontinuedOperationAmortization_44AEBCAD36AB0C4AD65A7A2D603FB7DF" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mrcy_DisposalGroupIncludingDiscontinuedOperationCostsAbstract_20BCC8C7B81F934B30417A2D603CD6B7" xlink:to="loc_mrcy_DisposalGroupIncludingDiscontinuedOperationAmortization_44AEBCAD36AB0C4AD65A7A2D603FB7DF" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_DisposalGroupIncludingDiscontinuedOperationAcquisitionCostsandOtherRelatedCharges" xlink:label="loc_mrcy_DisposalGroupIncludingDiscontinuedOperationAcquisitionCostsandOtherRelatedCharges_C772B3F2881C1A95F1E47A2D603F4E55" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mrcy_DisposalGroupIncludingDiscontinuedOperationCostsAbstract_20BCC8C7B81F934B30417A2D603CD6B7" xlink:to="loc_mrcy_DisposalGroupIncludingDiscontinuedOperationAcquisitionCostsandOtherRelatedCharges_C772B3F2881C1A95F1E47A2D603F4E55" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_GoodwillImpairmentLoss" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_6C578DF06CBACDD7F0B57A2D603FB7B8" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mrcy_DisposalGroupIncludingDiscontinuedOperationCostsAbstract_20BCC8C7B81F934B30417A2D603CD6B7" xlink:to="loc_us-gaap_GoodwillImpairmentLoss_6C578DF06CBACDD7F0B57A2D603FB7B8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax" xlink:label="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax_B86DFC673ADA465F11927A2D603F7BD0" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_4D892081EC8C036AA24D7A2D603C7B5D" xlink:to="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax_B86DFC673ADA465F11927A2D603F7BD0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax" xlink:label="loc_us-gaap_DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax_E3BB70D91A92E7FB9B527A2D6040BE46" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_4D892081EC8C036AA24D7A2D603C7B5D" xlink:to="loc_us-gaap_DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax_E3BB70D91A92E7FB9B527A2D6040BE46" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation" xlink:label="loc_us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation_DE0983EE212309C950127A2D6040435C" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_4D892081EC8C036AA24D7A2D603C7B5D" xlink:to="loc_us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation_DE0983EE212309C950127A2D6040435C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity" xlink:label="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity_FB956BD292B0E73931597A2D6040F5BB" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_4D892081EC8C036AA24D7A2D603C7B5D" xlink:to="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity_FB956BD292B0E73931597A2D6040F5BB" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/DiscontinuedOperationsTables" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DiscontinuedOperationsAndDisposalGroupsAbstract" xlink:label="loc_us-gaap_DiscontinuedOperationsAndDisposalGroupsAbstract_2409887481D75B21567CD0F9349AE363" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfDisposalGroupsIncludingDiscontinuedOperationsIncomeStatementBalanceSheetAndAdditionalDisclosuresTextBlock" xlink:label="loc_us-gaap_ScheduleOfDisposalGroupsIncludingDiscontinuedOperationsIncomeStatementBalanceSheetAndAdditionalDisclosuresTextBlock_BE6A473D7781CDFC8C00D0F9349B1AE9" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DiscontinuedOperationsAndDisposalGroupsAbstract_2409887481D75B21567CD0F9349AE363" xlink:to="loc_us-gaap_ScheduleOfDisposalGroupsIncludingDiscontinuedOperationsIncomeStatementBalanceSheetAndAdditionalDisclosuresTextBlock_BE6A473D7781CDFC8C00D0F9349B1AE9" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/DocumentAndEntityInformation" xlink:type="extended">
    <loc xlink:href="mrcy-20160331.xsd#mrcy_DocumentDocumentandEntityInformationAbstract" xlink:label="loc_mrcy_DocumentDocumentandEntityInformationAbstract_9A65DD0388FBEAA76F00D0F9347A0BB1" xlink:type="locator" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntitiesTable" xlink:label="loc_dei_EntitiesTable_57E738B601E5D6A5207CD0F9347A3131" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mrcy_DocumentDocumentandEntityInformationAbstract_9A65DD0388FBEAA76F00D0F9347A0BB1" xlink:to="loc_dei_EntitiesTable_57E738B601E5D6A5207CD0F9347A3131" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_843F99C0EE3189220A9AD0F9347B9E71" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntitiesTable_57E738B601E5D6A5207CD0F9347A3131" xlink:to="loc_dei_LegalEntityAxis_843F99C0EE3189220A9AD0F9347B9E71" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_6E7A9769A0AB6819198DD0F9347B28CF" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_LegalEntityAxis_843F99C0EE3189220A9AD0F9347B9E71" xlink:to="loc_dei_EntityDomain_6E7A9769A0AB6819198DD0F9347B28CF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentInformationLineItems" xlink:label="loc_dei_DocumentInformationLineItems_2526E3B87075DE4CD8E7D0F9347B17C1" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntitiesTable_57E738B601E5D6A5207CD0F9347A3131" xlink:to="loc_dei_DocumentInformationLineItems_2526E3B87075DE4CD8E7D0F9347B17C1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentType" xlink:label="loc_dei_DocumentType_6769CDE6828688DB022FD0F9347BA01C" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_2526E3B87075DE4CD8E7D0F9347B17C1" xlink:to="loc_dei_DocumentType_6769CDE6828688DB022FD0F9347BA01C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_AmendmentFlag" xlink:label="loc_dei_AmendmentFlag_7B3DB131023C6A08F4C2D0F9347B0676" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_2526E3B87075DE4CD8E7D0F9347B17C1" xlink:to="loc_dei_AmendmentFlag_7B3DB131023C6A08F4C2D0F9347B0676" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentPeriodEndDate" xlink:label="loc_dei_DocumentPeriodEndDate_A3656E982264DD27B709D0F9347BF345" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_2526E3B87075DE4CD8E7D0F9347B17C1" xlink:to="loc_dei_DocumentPeriodEndDate_A3656E982264DD27B709D0F9347BF345" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentFiscalYearFocus" xlink:label="loc_dei_DocumentFiscalYearFocus_6F12C5AC51F317A6258CD0F9347BF65D" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_2526E3B87075DE4CD8E7D0F9347B17C1" xlink:to="loc_dei_DocumentFiscalYearFocus_6F12C5AC51F317A6258CD0F9347BF65D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentFiscalPeriodFocus" xlink:label="loc_dei_DocumentFiscalPeriodFocus_34090989AD96FB77589DD0F9347BC084" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_2526E3B87075DE4CD8E7D0F9347B17C1" xlink:to="loc_dei_DocumentFiscalPeriodFocus_34090989AD96FB77589DD0F9347BC084" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_TradingSymbol" xlink:label="loc_dei_TradingSymbol_F2F917E469D433684561D0F9347B06F4" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_2526E3B87075DE4CD8E7D0F9347B17C1" xlink:to="loc_dei_TradingSymbol_F2F917E469D433684561D0F9347B06F4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityRegistrantName" xlink:label="loc_dei_EntityRegistrantName_46414C9996B6FCAFCD63D0F9347BCE58" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_2526E3B87075DE4CD8E7D0F9347B17C1" xlink:to="loc_dei_EntityRegistrantName_46414C9996B6FCAFCD63D0F9347BCE58" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityCentralIndexKey" xlink:label="loc_dei_EntityCentralIndexKey_F9F0C28B67357C61D242D0F9347B06D9" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_2526E3B87075DE4CD8E7D0F9347B17C1" xlink:to="loc_dei_EntityCentralIndexKey_F9F0C28B67357C61D242D0F9347B06D9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_CurrentFiscalYearEndDate" xlink:label="loc_dei_CurrentFiscalYearEndDate_3DB02718B76DF2161BF9D0F9347B5B4F" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_2526E3B87075DE4CD8E7D0F9347B17C1" xlink:to="loc_dei_CurrentFiscalYearEndDate_3DB02718B76DF2161BF9D0F9347B5B4F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityFilerCategory" xlink:label="loc_dei_EntityFilerCategory_DB8FE263215B14378891D0F9347B688E" xlink:type="locator" />
    <presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_2526E3B87075DE4CD8E7D0F9347B17C1" xlink:to="loc_dei_EntityFilerCategory_DB8FE263215B14378891D0F9347B688E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityCommonStockSharesOutstanding" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_1852CDB43FD18BAC90C6D0F9347BCAE9" xlink:type="locator" />
    <presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_2526E3B87075DE4CD8E7D0F9347B17C1" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_1852CDB43FD18BAC90C6D0F9347BCAE9" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/ExpensesByReportableSegmentForRestructuringPlansDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherIncomeAndExpensesAbstract" xlink:label="loc_us-gaap_OtherIncomeAndExpensesAbstract_5CFE9030224C12F4EC37D0F9342DF6D2" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_AF6606D49C840FE0011DD0F9342DDCD7" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherIncomeAndExpensesAbstract_5CFE9030224C12F4EC37D0F9342DF6D2" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_AF6606D49C840FE0011DD0F9342DDCD7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_AF23935C12EAEB1A7AFED0F9342D9D40" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_AF6606D49C840FE0011DD0F9342DDCD7" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_AF23935C12EAEB1A7AFED0F9342D9D40" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_3814B740DE94EBD497B2D0F9342D0A39" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_AF23935C12EAEB1A7AFED0F9342D9D40" xlink:to="loc_us-gaap_SegmentDomain_3814B740DE94EBD497B2D0F9342D0A39" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_MercuryCommercialElectronicsMember" xlink:label="loc_mrcy_MercuryCommercialElectronicsMember_B5812619AEBDE9355476D0F9342D9F0D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentDomain_3814B740DE94EBD497B2D0F9342D0A39" xlink:to="loc_mrcy_MercuryCommercialElectronicsMember_B5812619AEBDE9355476D0F9342D9F0D" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_MercuryDefenseSystemsMember" xlink:label="loc_mrcy_MercuryDefenseSystemsMember_63B08E9DC3564545FC57D0F9342E4CD8" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentDomain_3814B740DE94EBD497B2D0F9342D0A39" xlink:to="loc_mrcy_MercuryDefenseSystemsMember_63B08E9DC3564545FC57D0F9342E4CD8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RestructuringCostAndReserveAxis" xlink:label="loc_us-gaap_RestructuringCostAndReserveAxis_3F389916D132826CB9D8D0F9342E5C26" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_AF6606D49C840FE0011DD0F9342DDCD7" xlink:to="loc_us-gaap_RestructuringCostAndReserveAxis_3F389916D132826CB9D8D0F9342E5C26" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_TypeOfRestructuringDomain" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_029489926DBB4731BBF1D0F9342EBF5D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_3F389916D132826CB9D8D0F9342E5C26" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_029489926DBB4731BBF1D0F9342EBF5D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EmployeeSeveranceMember" xlink:label="loc_us-gaap_EmployeeSeveranceMember_9974BE19B49BFB31B57DD0F9342E2869" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_029489926DBB4731BBF1D0F9342EBF5D" xlink:to="loc_us-gaap_EmployeeSeveranceMember_9974BE19B49BFB31B57DD0F9342E2869" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FacilityClosingMember" xlink:label="loc_us-gaap_FacilityClosingMember_67A4F7DA19179B885627D0F9342E9A2D" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_029489926DBB4731BBF1D0F9342EBF5D" xlink:to="loc_us-gaap_FacilityClosingMember_67A4F7DA19179B885627D0F9342E9A2D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RestructuringCostAndReserveLineItems" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_C3ACA8E62854A5FB3440D0F9342EA653" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_AF6606D49C840FE0011DD0F9342DDCD7" xlink:to="loc_us-gaap_RestructuringCostAndReserveLineItems_C3ACA8E62854A5FB3440D0F9342EA653" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RestructuringReserveRollForward" xlink:label="loc_us-gaap_RestructuringReserveRollForward_45609B227570C6CDB51DD0F9342E80CE" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_C3ACA8E62854A5FB3440D0F9342EA653" xlink:to="loc_us-gaap_RestructuringReserveRollForward_45609B227570C6CDB51DD0F9342E80CE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RestructuringReserveCurrent" xlink:label="loc_us-gaap_RestructuringReserveCurrent_362AA17AD420E25BFEFED0F9342EC80B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RestructuringReserveRollForward_45609B227570C6CDB51DD0F9342E80CE" xlink:to="loc_us-gaap_RestructuringReserveCurrent_362AA17AD420E25BFEFED0F9342EC80B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RestructuringSettlementAndImpairmentProvisions" xlink:label="loc_us-gaap_RestructuringSettlementAndImpairmentProvisions_21FF632FD69C2A5A48FDD0F9342E2889" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RestructuringReserveRollForward_45609B227570C6CDB51DD0F9342E80CE" xlink:to="loc_us-gaap_RestructuringSettlementAndImpairmentProvisions_21FF632FD69C2A5A48FDD0F9342E2889" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PaymentsForRestructuring" xlink:label="loc_us-gaap_PaymentsForRestructuring_89212857B96FE754A387D0F9342E248F" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RestructuringReserveRollForward_45609B227570C6CDB51DD0F9342E80CE" xlink:to="loc_us-gaap_PaymentsForRestructuring_89212857B96FE754A387D0F9342E248F" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_RestructuringExpenseReversal" xlink:label="loc_mrcy_RestructuringExpenseReversal_D045C6C54C48A106C32FD0F9342E0D33" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RestructuringReserveRollForward_45609B227570C6CDB51DD0F9342E80CE" xlink:to="loc_mrcy_RestructuringExpenseReversal_D045C6C54C48A106C32FD0F9342E0D33" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RestructuringReserveCurrent" xlink:label="loc_us-gaap_RestructuringReserveCurrent_E91A767FB6C6515AE191D0F9342EDCD1" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RestructuringReserveRollForward_45609B227570C6CDB51DD0F9342E80CE" xlink:to="loc_us-gaap_RestructuringReserveCurrent_E91A767FB6C6515AE191D0F9342EDCD1" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/FairValueOfFinancialInstruments" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract_852F0C5A88F4C4FFF413D0F936576A19" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueDisclosuresTextBlock" xlink:label="loc_us-gaap_FairValueDisclosuresTextBlock_74AAA74CF34793348934D0F936574494" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_852F0C5A88F4C4FFF413D0F936576A19" xlink:to="loc_us-gaap_FairValueDisclosuresTextBlock_74AAA74CF34793348934D0F936574494" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/FairValueOfFinancialInstrumentsSummaryOfFinancialAssetsMeasuredAtFairValueOnRecurringBasisDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract_C905F6D0AA6245E946B4D0F93561BDBC" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_957C4DBDFF475120AC8AD0F93562E850" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_C905F6D0AA6245E946B4D0F93561BDBC" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_957C4DBDFF475120AC8AD0F93562E850" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueByMeasurementBasisAxis" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_0A12A4C4174EAC1F7E4DD0F93562FA62" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_957C4DBDFF475120AC8AD0F93562E850" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_0A12A4C4174EAC1F7E4DD0F93562FA62" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueDisclosureItemAmountsDomain" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_F4629F3DD5BE516F960BD0F935623740" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_0A12A4C4174EAC1F7E4DD0F93562FA62" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_F4629F3DD5BE516F960BD0F935623740" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_FB5AA2ED2F1002A287B6D0F93562EEAA" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_F4629F3DD5BE516F960BD0F935623740" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_FB5AA2ED2F1002A287B6D0F93562EEAA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_375374C5C0D00F4E576AD0F93562C687" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_F4629F3DD5BE516F960BD0F935623740" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_375374C5C0D00F4E576AD0F93562C687" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueByAssetClassAxis" xlink:label="loc_us-gaap_FairValueByAssetClassAxis_A9FAA657810DF1519412D0F935627AE1" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_957C4DBDFF475120AC8AD0F93562E850" xlink:to="loc_us-gaap_FairValueByAssetClassAxis_A9FAA657810DF1519412D0F935627AE1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_236689E44A67EA673C05D0F93562C514" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_A9FAA657810DF1519412D0F935627AE1" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_236689E44A67EA673C05D0F93562C514" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CashAndCashEquivalentsMember" xlink:label="loc_us-gaap_CashAndCashEquivalentsMember_70ED872D7F4095981717D0F93562CF60" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_236689E44A67EA673C05D0F93562C514" xlink:to="loc_us-gaap_CashAndCashEquivalentsMember_70ED872D7F4095981717D0F93562CF60" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CertificatesOfDepositMember" xlink:label="loc_us-gaap_CertificatesOfDepositMember_4113E106CF7DB8CD7050D0F93562B184" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_236689E44A67EA673C05D0F93562C514" xlink:to="loc_us-gaap_CertificatesOfDepositMember_4113E106CF7DB8CD7050D0F93562B184" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_RestrictedCashMember" xlink:label="loc_mrcy_RestrictedCashMember_EC0C86B043CE11F121E3D0F9356247A5" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_236689E44A67EA673C05D0F93562C514" xlink:to="loc_mrcy_RestrictedCashMember_EC0C86B043CE11F121E3D0F9356247A5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CostmethodInvestmentsMember" xlink:label="loc_us-gaap_CostmethodInvestmentsMember_93C49C5C620DDBE88477D0F935625C78" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_236689E44A67EA673C05D0F93562C514" xlink:to="loc_us-gaap_CostmethodInvestmentsMember_93C49C5C620DDBE88477D0F935625C78" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_442DEAF7AD9C9E859260D0F935622305" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_957C4DBDFF475120AC8AD0F93562E850" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_442DEAF7AD9C9E859260D0F935622305" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_C28907E7F06D5072FE12D0F93562AEA3" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_442DEAF7AD9C9E859260D0F935622305" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_C28907E7F06D5072FE12D0F93562AEA3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_E1103C730DA1FCFB6B42D0F9356298E5" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_C28907E7F06D5072FE12D0F93562AEA3" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_E1103C730DA1FCFB6B42D0F9356298E5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_3901997FAA68589BBB02D0F935639A3A" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_957C4DBDFF475120AC8AD0F93562E850" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_3901997FAA68589BBB02D0F935639A3A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_F4CA8AA29EB75E58BF2AD0F93563C361" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_3901997FAA68589BBB02D0F935639A3A" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_F4CA8AA29EB75E58BF2AD0F93563C361" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_8D64A6A095524BBE3462D0F93563585E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_F4CA8AA29EB75E58BF2AD0F93563C361" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_8D64A6A095524BBE3462D0F93563585E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_67FA6D704477FD8B9CA6D0F93563AC4D" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_F4CA8AA29EB75E58BF2AD0F93563C361" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_67FA6D704477FD8B9CA6D0F93563AC4D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_39A9B8E3C619B7181DF9D0F93563A003" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_F4CA8AA29EB75E58BF2AD0F93563C361" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_39A9B8E3C619B7181DF9D0F93563A003" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_EAC03B8B482F52D33D91D0F935633B85" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_957C4DBDFF475120AC8AD0F93562E850" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_EAC03B8B482F52D33D91D0F935633B85" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_34A7825C504667425CCCD0F935635E2F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_EAC03B8B482F52D33D91D0F935633B85" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_34A7825C504667425CCCD0F935635E2F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AssetsFairValueDisclosureAbstract" xlink:label="loc_us-gaap_AssetsFairValueDisclosureAbstract_751D8E763057DD472813D0F93563DE84" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_EAC03B8B482F52D33D91D0F935633B85" xlink:to="loc_us-gaap_AssetsFairValueDisclosureAbstract_751D8E763057DD472813D0F93563DE84" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AssetsFairValueDisclosure" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_5D064C1474A65B32D157D0F935639EB7" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_751D8E763057DD472813D0F93563DE84" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_5D064C1474A65B32D157D0F935639EB7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_30432A0ADE999D9F9441D0F9356338A1" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_EAC03B8B482F52D33D91D0F935633B85" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_30432A0ADE999D9F9441D0F9356338A1" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/FairValueOfFinancialInstrumentsTables" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract_8BB5ECA17B4BBF9C391ED0F9343CD2A5" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock_F2AC67FB0652A42C0027D0F9343D535F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_8BB5ECA17B4BBF9C391ED0F9343CD2A5" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock_F2AC67FB0652A42C0027D0F9343D535F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_DD45586602FA0FA547E0D0F9343D6B30" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_8BB5ECA17B4BBF9C391ED0F9343CD2A5" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_DD45586602FA0FA547E0D0F9343D6B30" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/Goodwill" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_68293F8E00FB9713FC99D0F935A32F08" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_GoodwillDisclosureTextBlock" xlink:label="loc_us-gaap_GoodwillDisclosureTextBlock_BA8DD5EDE17FEB45E1ADD0F935A47DE8" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_68293F8E00FB9713FC99D0F935A32F08" xlink:to="loc_us-gaap_GoodwillDisclosureTextBlock_BA8DD5EDE17FEB45E1ADD0F935A47DE8" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/GoodwillTables" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_D70D06AEB567F39FA28FD0F935ECBFF3" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfGoodwillTextBlock" xlink:label="loc_us-gaap_ScheduleOfGoodwillTextBlock_5317399E8EFD336D0BFED0F935EC251C" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_D70D06AEB567F39FA28FD0F935ECBFF3" xlink:to="loc_us-gaap_ScheduleOfGoodwillTextBlock_5317399E8EFD336D0BFED0F935EC251C" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/IncomeTaxes" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="loc_us-gaap_IncomeTaxDisclosureAbstract_24C2A762C48642D73DB4D0F934AA75AA" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxDisclosureTextBlock" xlink:label="loc_us-gaap_IncomeTaxDisclosureTextBlock_CB5A4B096C768D460EBDD0F934ACDBB5" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_24C2A762C48642D73DB4D0F934AA75AA" xlink:to="loc_us-gaap_IncomeTaxDisclosureTextBlock_CB5A4B096C768D460EBDD0F934ACDBB5" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/IncomeTaxesAdditionalInformationDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="loc_us-gaap_IncomeTaxDisclosureAbstract_B5C0B4B74BD9F3A16F7CD0F9362106F5" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_TaxCreditCarryforwardTable" xlink:label="loc_us-gaap_TaxCreditCarryforwardTable_7B16D2B5AE2C23F7877CD0F93622CCAE" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_B5C0B4B74BD9F3A16F7CD0F9362106F5" xlink:to="loc_us-gaap_TaxCreditCarryforwardTable_7B16D2B5AE2C23F7877CD0F93622CCAE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="loc_us-gaap_StatementScenarioAxis_5432AA8CD8202198746FD0F936225E91" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TaxCreditCarryforwardTable_7B16D2B5AE2C23F7877CD0F93622CCAE" xlink:to="loc_us-gaap_StatementScenarioAxis_5432AA8CD8202198746FD0F936225E91" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_E8ED158D2BA0182A7F95D0F93622D6A8" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementScenarioAxis_5432AA8CD8202198746FD0F936225E91" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_E8ED158D2BA0182A7F95D0F93622D6A8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScenarioForecastMember" xlink:label="loc_us-gaap_ScenarioForecastMember_54D4F0FF8B2C861ACB24D0F936227DF5" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScenarioUnspecifiedDomain_E8ED158D2BA0182A7F95D0F93622D6A8" xlink:to="loc_us-gaap_ScenarioForecastMember_54D4F0FF8B2C861ACB24D0F936227DF5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_TaxCreditCarryforwardLineItems" xlink:label="loc_us-gaap_TaxCreditCarryforwardLineItems_3EEDB8F2E3F6C4F52C2AD0F9362212EC" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TaxCreditCarryforwardTable_7B16D2B5AE2C23F7877CD0F93622CCAE" xlink:to="loc_us-gaap_TaxCreditCarryforwardLineItems_3EEDB8F2E3F6C4F52C2AD0F9362212EC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_A08D666830B7FB5A88A0D0F936225A42" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TaxCreditCarryforwardLineItems_3EEDB8F2E3F6C4F52C2AD0F9362212EC" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_A08D666830B7FB5A88A0D0F936225A42" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_30B1308B1D959D649B6FD0F93622D195" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TaxCreditCarryforwardLineItems_3EEDB8F2E3F6C4F52C2AD0F9362212EC" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_30B1308B1D959D649B6FD0F93622D195" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit" xlink:label="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit_C6E232D414A45FC25C25D0F93622554A" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TaxCreditCarryforwardLineItems_3EEDB8F2E3F6C4F52C2AD0F9362212EC" xlink:to="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit_C6E232D414A45FC25C25D0F93622554A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxReconciliationTaxCreditsResearch" xlink:label="loc_us-gaap_IncomeTaxReconciliationTaxCreditsResearch_C4517E9DAD5F8114B2C3D0F936227B7B" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TaxCreditCarryforwardLineItems_3EEDB8F2E3F6C4F52C2AD0F9362212EC" xlink:to="loc_us-gaap_IncomeTaxReconciliationTaxCreditsResearch_C4517E9DAD5F8114B2C3D0F936227B7B" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/Inventory" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InventoryDisclosureAbstract" xlink:label="loc_us-gaap_InventoryDisclosureAbstract_0DB4F38E9E345EDCD20BD0F934215962" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InventoryDisclosureTextBlock" xlink:label="loc_us-gaap_InventoryDisclosureTextBlock_3E1AA89C4BFBD68CB90DD0F93421CFDB" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryDisclosureAbstract_0DB4F38E9E345EDCD20BD0F934215962" xlink:to="loc_us-gaap_InventoryDisclosureTextBlock_3E1AA89C4BFBD68CB90DD0F93421CFDB" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/InventoryAdditionalInformationDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InventoryDisclosureAbstract" xlink:label="loc_us-gaap_InventoryDisclosureAbstract_8A89BA6A0BCAC68A1BCFD0F93550741D" xlink:type="locator" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_ScheduleOfInventoryTable" xlink:label="loc_mrcy_ScheduleOfInventoryTable_7A820A780609B4FB61BCD0F93551DC1D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryDisclosureAbstract_8A89BA6A0BCAC68A1BCFD0F93550741D" xlink:to="loc_mrcy_ScheduleOfInventoryTable_7A820A780609B4FB61BCD0F93551DC1D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ProductOrServiceAxis" xlink:label="loc_us-gaap_ProductOrServiceAxis_69309F407914FCA4DED2D0F935513DBC" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mrcy_ScheduleOfInventoryTable_7A820A780609B4FB61BCD0F93551DC1D" xlink:to="loc_us-gaap_ProductOrServiceAxis_69309F407914FCA4DED2D0F935513DBC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ProductsAndServicesDomain" xlink:label="loc_us-gaap_ProductsAndServicesDomain_5E0A177F1163A562B0BED0F93551174E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ProductOrServiceAxis_69309F407914FCA4DED2D0F935513DBC" xlink:to="loc_us-gaap_ProductsAndServicesDomain_5E0A177F1163A562B0BED0F93551174E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ProductMember" xlink:label="loc_us-gaap_ProductMember_C0AFED28DB9984F28ED3D0F935517A88" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ProductsAndServicesDomain_5E0A177F1163A562B0BED0F93551174E" xlink:to="loc_us-gaap_ProductMember_C0AFED28DB9984F28ED3D0F935517A88" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_ScheduleOfInventoryLineItems" xlink:label="loc_mrcy_ScheduleOfInventoryLineItems_2AAA4698B0FCAFCB57A0D0F935516483" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mrcy_ScheduleOfInventoryTable_7A820A780609B4FB61BCD0F93551DC1D" xlink:to="loc_mrcy_ScheduleOfInventoryLineItems_2AAA4698B0FCAFCB57A0D0F935516483" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncreaseDecreaseInInventories" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_EBD410BCFFF997C67194D0F93551FD9C" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mrcy_ScheduleOfInventoryLineItems_2AAA4698B0FCAFCB57A0D0F935516483" xlink:to="loc_us-gaap_IncreaseDecreaseInInventories_EBD410BCFFF997C67194D0F93551FD9C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InventoryForLongTermContractsOrPrograms" xlink:label="loc_us-gaap_InventoryForLongTermContractsOrPrograms_A72D007756669DBED7CBD0F93551EB27" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mrcy_ScheduleOfInventoryLineItems_2AAA4698B0FCAFCB57A0D0F935516483" xlink:to="loc_us-gaap_InventoryForLongTermContractsOrPrograms_A72D007756669DBED7CBD0F93551EB27" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OperatingCycle" xlink:label="loc_us-gaap_OperatingCycle_49027D85FDBEF4857288D0F93551004E" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mrcy_ScheduleOfInventoryLineItems_2AAA4698B0FCAFCB57A0D0F935516483" xlink:to="loc_us-gaap_OperatingCycle_49027D85FDBEF4857288D0F93551004E" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/InventoryDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InventoryDisclosureAbstract" xlink:label="loc_us-gaap_InventoryDisclosureAbstract_27318A840C2B0DDDFF18D0F934078270" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InventoryRawMaterialsNetOfReserves" xlink:label="loc_us-gaap_InventoryRawMaterialsNetOfReserves_59BAE9A8479D32E70781D0F93407349D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryDisclosureAbstract_27318A840C2B0DDDFF18D0F934078270" xlink:to="loc_us-gaap_InventoryRawMaterialsNetOfReserves_59BAE9A8479D32E70781D0F93407349D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InventoryWorkInProcessNetOfReserves" xlink:label="loc_us-gaap_InventoryWorkInProcessNetOfReserves_F2AC4A580AFE1971FBC0D0F93407E9B4" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryDisclosureAbstract_27318A840C2B0DDDFF18D0F934078270" xlink:to="loc_us-gaap_InventoryWorkInProcessNetOfReserves_F2AC4A580AFE1971FBC0D0F93407E9B4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InventoryFinishedGoodsNetOfReserves" xlink:label="loc_us-gaap_InventoryFinishedGoodsNetOfReserves_D3F2D74258699AFE9CB5D0F934075A65" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryDisclosureAbstract_27318A840C2B0DDDFF18D0F934078270" xlink:to="loc_us-gaap_InventoryFinishedGoodsNetOfReserves_D3F2D74258699AFE9CB5D0F934075A65" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InventoryNet" xlink:label="loc_us-gaap_InventoryNet_7699EC10F25B3A4D4530D0F93407AC99" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryDisclosureAbstract_27318A840C2B0DDDFF18D0F934078270" xlink:to="loc_us-gaap_InventoryNet_7699EC10F25B3A4D4530D0F93407AC99" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/InventoryTables" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InventoryDisclosureAbstract" xlink:label="loc_us-gaap_InventoryDisclosureAbstract_FCFFD91AFEC6E79D8A92D0F934015669" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfInventoryCurrentTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfInventoryCurrentTableTextBlock_ADE4EA1CE260386D2546D0F93402EA46" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryDisclosureAbstract_FCFFD91AFEC6E79D8A92D0F934015669" xlink:to="loc_us-gaap_ScheduleOfInventoryCurrentTableTextBlock_ADE4EA1CE260386D2546D0F93402EA46" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/OperatingSegmentGeographicInformationAndSignificantCustomers" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_F4A3029ACF26F3B3CBD8D0F936455C53" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SegmentReportingDisclosureTextBlock" xlink:label="loc_us-gaap_SegmentReportingDisclosureTextBlock_3463BE7043661C8BA97CD0F93645EF1F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_F4A3029ACF26F3B3CBD8D0F936455C53" xlink:to="loc_us-gaap_SegmentReportingDisclosureTextBlock_3463BE7043661C8BA97CD0F93645EF1F" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/OperatingSegmentGeographicInformationAndSignificantCustomersCustomersComprisingTenPercentOrMoreRevenuesDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_4B144FB92F22180C2FD24ED090AD4CF2" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable" xlink:label="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_72D28056782ADBAC66604ED090AD70A5" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_4B144FB92F22180C2FD24ED090AD4CF2" xlink:to="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_72D28056782ADBAC66604ED090AD70A5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_F05160E1DADA8241AD2A4ED090AD8FD0" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_72D28056782ADBAC66604ED090AD70A5" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_F05160E1DADA8241AD2A4ED090AD8FD0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_182EA258A96884E5205D4ED090AD2151" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_F05160E1DADA8241AD2A4ED090AD8FD0" xlink:to="loc_us-gaap_SegmentDomain_182EA258A96884E5205D4ED090AD2151" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ConcentrationRiskByTypeAxis" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_041CEA1CC82C353749704ED090ADD8C2" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_72D28056782ADBAC66604ED090AD70A5" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_041CEA1CC82C353749704ED090ADD8C2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_FB0AC377A1666F5E91134ED090ADB8B9" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_041CEA1CC82C353749704ED090ADD8C2" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_FB0AC377A1666F5E91134ED090ADB8B9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CustomerConcentrationRiskMember" xlink:label="loc_us-gaap_CustomerConcentrationRiskMember_9BF7574F1F5DA51E0AF14ED090AD0593" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_FB0AC377A1666F5E91134ED090ADB8B9" xlink:to="loc_us-gaap_CustomerConcentrationRiskMember_9BF7574F1F5DA51E0AF14ED090AD0593" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_68B45034D6EFC53EA2594ED090AD05C0" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_72D28056782ADBAC66604ED090AD70A5" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_68B45034D6EFC53EA2594ED090AD05C0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ConcentrationRiskBenchmarkDomain" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_4A0E19E378932DEA85694ED090AD11AA" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_68B45034D6EFC53EA2594ED090AD05C0" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_4A0E19E378932DEA85694ED090AD11AA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SalesRevenueNetMember" xlink:label="loc_us-gaap_SalesRevenueNetMember_7D3936230156EBA75D814ED090AD32A3" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_4A0E19E378932DEA85694ED090AD11AA" xlink:to="loc_us-gaap_SalesRevenueNetMember_7D3936230156EBA75D814ED090AD32A3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_MajorCustomersAxis" xlink:label="loc_us-gaap_MajorCustomersAxis_CF1126F75CBE3491E3F34ED090ADC485" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_72D28056782ADBAC66604ED090AD70A5" xlink:to="loc_us-gaap_MajorCustomersAxis_CF1126F75CBE3491E3F34ED090ADC485" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NameOfMajorCustomerDomain" xlink:label="loc_us-gaap_NameOfMajorCustomerDomain_BFC3D1F2F46FE166ACCE4ED090AE6739" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorCustomersAxis_CF1126F75CBE3491E3F34ED090ADC485" xlink:to="loc_us-gaap_NameOfMajorCustomerDomain_BFC3D1F2F46FE166ACCE4ED090AE6739" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_RaytheonCompanyMember" xlink:label="loc_mrcy_RaytheonCompanyMember_62D50EC28E5788A170374ED090AEB046" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NameOfMajorCustomerDomain_BFC3D1F2F46FE166ACCE4ED090AE6739" xlink:to="loc_mrcy_RaytheonCompanyMember_62D50EC28E5788A170374ED090AEB046" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_LockheedMartinCorporationMember" xlink:label="loc_mrcy_LockheedMartinCorporationMember_BE7D7A2302226B8A31B34ED090B3AC4C" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NameOfMajorCustomerDomain_BFC3D1F2F46FE166ACCE4ED090AE6739" xlink:to="loc_mrcy_LockheedMartinCorporationMember_BE7D7A2302226B8A31B34ED090B3AC4C" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_NorthropGrummanCorporationMember" xlink:label="loc_mrcy_NorthropGrummanCorporationMember_45E7326DD9B5232FBE084ED13702D4B4" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NameOfMajorCustomerDomain_BFC3D1F2F46FE166ACCE4ED090AE6739" xlink:to="loc_mrcy_NorthropGrummanCorporationMember_45E7326DD9B5232FBE084ED13702D4B4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EntityWideRevenueMajorCustomerLineItems" xlink:label="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_2F60927F3D7D7246696B4ED090B30A47" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_72D28056782ADBAC66604ED090AD70A5" xlink:to="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_2F60927F3D7D7246696B4ED090B30A47" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ConcentrationRiskPercentage1" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_70974297ACCF033CE0B64ED090B353E4" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_2F60927F3D7D7246696B4ED090B30A47" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_70974297ACCF033CE0B64ED090B353E4" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/OperatingSegmentGeographicInformationAndSignificantCustomersGeographicDistributionOfRevenuesAndLongLivedAssetsFromContinuingOperationsDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_81732F61DCC4ABD655A1D0F934E2E277" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable" xlink:label="loc_us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable_57A05396A2088E189D4FD0F934E3B432" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_81732F61DCC4ABD655A1D0F934E2E277" xlink:to="loc_us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable_57A05396A2088E189D4FD0F934E3B432" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ConsolidationItemsAxis" xlink:label="loc_us-gaap_ConsolidationItemsAxis_B0D3E5EEBDFD43844183D0F934E3FAEA" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable_57A05396A2088E189D4FD0F934E3B432" xlink:to="loc_us-gaap_ConsolidationItemsAxis_B0D3E5EEBDFD43844183D0F934E3FAEA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ConsolidationItemsDomain" xlink:label="loc_us-gaap_ConsolidationItemsDomain_88217572A9565F8FD3A1D0F934E36603" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ConsolidationItemsAxis_B0D3E5EEBDFD43844183D0F934E3FAEA" xlink:to="loc_us-gaap_ConsolidationItemsDomain_88217572A9565F8FD3A1D0F934E36603" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ReportableGeographicalComponentsMember" xlink:label="loc_us-gaap_ReportableGeographicalComponentsMember_7F9186D98AE220270BB4D0F934E354E0" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ConsolidationItemsDomain_88217572A9565F8FD3A1D0F934E36603" xlink:to="loc_us-gaap_ReportableGeographicalComponentsMember_7F9186D98AE220270BB4D0F934E354E0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_GeographyEliminationsMember" xlink:label="loc_us-gaap_GeographyEliminationsMember_C2C66E333506A0867034D0F934E3FE87" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ConsolidationItemsDomain_88217572A9565F8FD3A1D0F934E36603" xlink:to="loc_us-gaap_GeographyEliminationsMember_C2C66E333506A0867034D0F934E3FE87" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementGeographicalAxis" xlink:label="loc_us-gaap_StatementGeographicalAxis_ECE9D17129B22A190D26D0F934E38A28" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable_57A05396A2088E189D4FD0F934E3B432" xlink:to="loc_us-gaap_StatementGeographicalAxis_ECE9D17129B22A190D26D0F934E38A28" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_180455FEAD3B155EE2B8D0F934E3DBC1" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementGeographicalAxis_ECE9D17129B22A190D26D0F934E38A28" xlink:to="loc_us-gaap_SegmentGeographicalDomain_180455FEAD3B155EE2B8D0F934E3DBC1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/country/2013/country-2013-01-31.xsd#country_US" xlink:label="loc_country_US_FA1A1A27E2E5166F4BDFD0F934E3B964" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentGeographicalDomain_180455FEAD3B155EE2B8D0F934E3DBC1" xlink:to="loc_country_US_FA1A1A27E2E5166F4BDFD0F934E3B964" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EuropeMember" xlink:label="loc_us-gaap_EuropeMember_B3860379796325EE0529D0F934E394A5" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentGeographicalDomain_180455FEAD3B155EE2B8D0F934E3DBC1" xlink:to="loc_us-gaap_EuropeMember_B3860379796325EE0529D0F934E394A5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AsiaPacificMember" xlink:label="loc_us-gaap_AsiaPacificMember_6D44F1AE4507DB4E3841D0F934E3847A" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentGeographicalDomain_180455FEAD3B155EE2B8D0F934E3DBC1" xlink:to="loc_us-gaap_AsiaPacificMember_6D44F1AE4507DB4E3841D0F934E3847A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SegmentReportingRevenueReconcilingItemLineItems" xlink:label="loc_us-gaap_SegmentReportingRevenueReconcilingItemLineItems_454631051DD31F79EA63D0F934E4D48A" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable_57A05396A2088E189D4FD0F934E3B432" xlink:to="loc_us-gaap_SegmentReportingRevenueReconcilingItemLineItems_454631051DD31F79EA63D0F934E4D48A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues_723F2D43585248D0C28BD0F934E42EC9" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingRevenueReconcilingItemLineItems_454631051DD31F79EA63D0F934E4D48A" xlink:to="loc_us-gaap_Revenues_723F2D43585248D0C28BD0F934E42EC9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NoncurrentAssets" xlink:label="loc_us-gaap_NoncurrentAssets_700A0910FD96285796A5D0F934E451C1" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingRevenueReconcilingItemLineItems_454631051DD31F79EA63D0F934E4D48A" xlink:to="loc_us-gaap_NoncurrentAssets_700A0910FD96285796A5D0F934E451C1" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/OperatingSegmentGeographicInformationAndSignificantCustomersProgramsComprisingTenPercentOrMoreOfCompanysRevenueDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_29AEF877C3C9A6CB8E1ED0F9344DA634" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_D17FEA145C67CFDEE9A0D0F9344D71FD" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_29AEF877C3C9A6CB8E1ED0F9344DA634" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_D17FEA145C67CFDEE9A0D0F9344D71FD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ProductOrServiceAxis" xlink:label="loc_us-gaap_ProductOrServiceAxis_BE5A8F1DA3BB19512C93D0F9344D79F4" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_D17FEA145C67CFDEE9A0D0F9344D71FD" xlink:to="loc_us-gaap_ProductOrServiceAxis_BE5A8F1DA3BB19512C93D0F9344D79F4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ProductsAndServicesDomain" xlink:label="loc_us-gaap_ProductsAndServicesDomain_B62BE38512BD87020228D0F9344D5896" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ProductOrServiceAxis_BE5A8F1DA3BB19512C93D0F9344D79F4" xlink:to="loc_us-gaap_ProductsAndServicesDomain_B62BE38512BD87020228D0F9344D5896" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_SEWIPProgramMember" xlink:label="loc_mrcy_SEWIPProgramMember_933C75E2BE508286B23BD0F9344D09D7" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ProductsAndServicesDomain_B62BE38512BD87020228D0F9344D5896" xlink:to="loc_mrcy_SEWIPProgramMember_933C75E2BE508286B23BD0F9344D09D7" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_F35ProgramMember" xlink:label="loc_mrcy_F35ProgramMember_389A4479AC4EDF83DFB9D0F9344DBDD9" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ProductsAndServicesDomain_B62BE38512BD87020228D0F9344D5896" xlink:to="loc_mrcy_F35ProgramMember_389A4479AC4EDF83DFB9D0F9344DBDD9" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_PatriotProgramMember" xlink:label="loc_mrcy_PatriotProgramMember_2E7F3F59F93065955D91D0F9344D581F" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ProductsAndServicesDomain_B62BE38512BD87020228D0F9344D5896" xlink:to="loc_mrcy_PatriotProgramMember_2E7F3F59F93065955D91D0F9344D581F" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_AegisProgramMember" xlink:label="loc_mrcy_AegisProgramMember_0B54D2E980DAA0B6FC2ED0F9344D9038" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ProductsAndServicesDomain_B62BE38512BD87020228D0F9344D5896" xlink:to="loc_mrcy_AegisProgramMember_0B54D2E980DAA0B6FC2ED0F9344D9038" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_8951A04DE2062B449800D0F9344DB399" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_D17FEA145C67CFDEE9A0D0F9344D71FD" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_8951A04DE2062B449800D0F9344DB399" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ConcentrationRiskBenchmarkDomain" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_2037EC36CACAE3D5053ED0F9344DB756" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_8951A04DE2062B449800D0F9344DB399" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_2037EC36CACAE3D5053ED0F9344DB756" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SalesRevenueNetMember" xlink:label="loc_us-gaap_SalesRevenueNetMember_0302BF86CA0B092F7EF7D0F9344DF184" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_2037EC36CACAE3D5053ED0F9344DB756" xlink:to="loc_us-gaap_SalesRevenueNetMember_0302BF86CA0B092F7EF7D0F9344DF184" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_MajorCustomersAxis" xlink:label="loc_us-gaap_MajorCustomersAxis_2A1A4B9E0CE045C8BF5CD0F9344D6695" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_D17FEA145C67CFDEE9A0D0F9344D71FD" xlink:to="loc_us-gaap_MajorCustomersAxis_2A1A4B9E0CE045C8BF5CD0F9344D6695" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NameOfMajorCustomerDomain" xlink:label="loc_us-gaap_NameOfMajorCustomerDomain_46D0FBC23EE6853D83E2D0F9344D1A5D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorCustomersAxis_2A1A4B9E0CE045C8BF5CD0F9344D6695" xlink:to="loc_us-gaap_NameOfMajorCustomerDomain_46D0FBC23EE6853D83E2D0F9344D1A5D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ConcentrationRiskByTypeAxis" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_7882C3B13AE3422A4D71D0F9344D4B1D" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_D17FEA145C67CFDEE9A0D0F9344D71FD" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_7882C3B13AE3422A4D71D0F9344D4B1D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_8F18F5E079F47D512628D0F9344DCEC9" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_7882C3B13AE3422A4D71D0F9344D4B1D" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_8F18F5E079F47D512628D0F9344DCEC9" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_ProgramConcentrationRiskMember" xlink:label="loc_mrcy_ProgramConcentrationRiskMember_A580C4853F87BA8C2027D0F9344D3899" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_8F18F5E079F47D512628D0F9344DCEC9" xlink:to="loc_mrcy_ProgramConcentrationRiskMember_A580C4853F87BA8C2027D0F9344D3899" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_5BA88E543321D231D706D0F9344DDBE4" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_D17FEA145C67CFDEE9A0D0F9344D71FD" xlink:to="loc_us-gaap_SegmentReportingInformationLineItems_5BA88E543321D231D706D0F9344DDBE4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ConcentrationRiskPercentage1" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_62C17415F9910C95E4B6D0F9344E1D1A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_5BA88E543321D231D706D0F9344DDBE4" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_62C17415F9910C95E4B6D0F9344E1D1A" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/OperatingSegmentGeographicInformationAndSignificantCustomersReconcilesNetIncomeLossMostDirectlyComparableGaapFinancialMeasureToAdjustedEbitdaDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_5D2E499741FA0A4E1A8DD0F936508690" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeLossFromContinuingOperations" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperations_391BE1A0FFD8C4091AB5D0F9365015A0" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_5D2E499741FA0A4E1A8DD0F936508690" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperations_391BE1A0FFD8C4091AB5D0F9365015A0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InterestIncomeExpenseNet" xlink:label="loc_us-gaap_InterestIncomeExpenseNet_D2E6126AC6F8B21F331BD0F93650FEF2" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_5D2E499741FA0A4E1A8DD0F936508690" xlink:to="loc_us-gaap_InterestIncomeExpenseNet_D2E6126AC6F8B21F331BD0F93650FEF2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_C914E86482EA295E7D34D0F936506597" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_5D2E499741FA0A4E1A8DD0F936508690" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_C914E86482EA295E7D34D0F936506597" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_Depreciation" xlink:label="loc_us-gaap_Depreciation_62F9FBE1A10FE0BF1B94D0F936506AA8" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_5D2E499741FA0A4E1A8DD0F936508690" xlink:to="loc_us-gaap_Depreciation_62F9FBE1A10FE0BF1B94D0F936506AA8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_6DE4221F5FA4F1BD736AD0F93650FF7F" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_5D2E499741FA0A4E1A8DD0F936508690" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_6DE4221F5FA4F1BD736AD0F93650FF7F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RestructuringCharges" xlink:label="loc_us-gaap_RestructuringCharges_BCB11FCDF65CEFB0EE11D0F93650491E" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_5D2E499741FA0A4E1A8DD0F936508690" xlink:to="loc_us-gaap_RestructuringCharges_BCB11FCDF65CEFB0EE11D0F93650491E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ImpairmentOfIntangibleAssetsFinitelived" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsFinitelived_C629018E42C655CF2D7AD0F936506257" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_5D2E499741FA0A4E1A8DD0F936508690" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetsFinitelived_C629018E42C655CF2D7AD0F936506257" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_242FE93E0E59A2553D4BD0F93650C310" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_5D2E499741FA0A4E1A8DD0F936508690" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_242FE93E0E59A2553D4BD0F93650C310" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization" xlink:label="loc_mrcy_AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization_FD0A59B78F3911ED7A10D0F936503BD9" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_5D2E499741FA0A4E1A8DD0F936508690" xlink:to="loc_mrcy_AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization_FD0A59B78F3911ED7A10D0F936503BD9" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_AcquisitionandFinancingCosts" xlink:label="loc_mrcy_AcquisitionandFinancingCosts_83A76325E963A525BBB6D0F9365068B0" xlink:type="locator" />
    <presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_5D2E499741FA0A4E1A8DD0F936508690" xlink:to="loc_mrcy_AcquisitionandFinancingCosts_83A76325E963A525BBB6D0F9365068B0" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_FairValueAdjustmentsFromPurchaseAccounting" xlink:label="loc_mrcy_FairValueAdjustmentsFromPurchaseAccounting_F2A61F66ADD8E14AB5F9D0F936502AEB" xlink:type="locator" />
    <presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_5D2E499741FA0A4E1A8DD0F936508690" xlink:to="loc_mrcy_FairValueAdjustmentsFromPurchaseAccounting_F2A61F66ADD8E14AB5F9D0F936502AEB" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/OperatingSegmentGeographicInformationAndSignificantCustomersSummaryOfPerformanceOfOperationsByReportableSegmentDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_C815856B9AD4397C6285D0F935BA41F4" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable" xlink:label="loc_us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable_02667123F9BC2CAE17E2D0F935BA6551" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_C815856B9AD4397C6285D0F935BA41F4" xlink:to="loc_us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable_02667123F9BC2CAE17E2D0F935BA6551" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ConsolidationItemsAxis" xlink:label="loc_us-gaap_ConsolidationItemsAxis_02ED5352BF19DF065956D0F935BA143D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable_02667123F9BC2CAE17E2D0F935BA6551" xlink:to="loc_us-gaap_ConsolidationItemsAxis_02ED5352BF19DF065956D0F935BA143D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ConsolidationItemsDomain" xlink:label="loc_us-gaap_ConsolidationItemsDomain_3695276C09CB5B9CEECCD0F935BA8220" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ConsolidationItemsAxis_02ED5352BF19DF065956D0F935BA143D" xlink:to="loc_us-gaap_ConsolidationItemsDomain_3695276C09CB5B9CEECCD0F935BA8220" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_MaterialReconcilingItemsMember" xlink:label="loc_us-gaap_MaterialReconcilingItemsMember_C75B77F069483DB5D0AAD0F935BA5321" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ConsolidationItemsDomain_3695276C09CB5B9CEECCD0F935BA8220" xlink:to="loc_us-gaap_MaterialReconcilingItemsMember_C75B77F069483DB5D0AAD0F935BA5321" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IntersegmentEliminationMember" xlink:label="loc_us-gaap_IntersegmentEliminationMember_B0D740EC8D8132686EDAD0F935BA8C12" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ConsolidationItemsDomain_3695276C09CB5B9CEECCD0F935BA8220" xlink:to="loc_us-gaap_IntersegmentEliminationMember_B0D740EC8D8132686EDAD0F935BA8C12" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OperatingSegmentsMember" xlink:label="loc_us-gaap_OperatingSegmentsMember_F9BFEAC9C818A3DBA80BD0F935BA9B1C" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ConsolidationItemsDomain_3695276C09CB5B9CEECCD0F935BA8220" xlink:to="loc_us-gaap_OperatingSegmentsMember_F9BFEAC9C818A3DBA80BD0F935BA9B1C" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_SegmentReconcilingItemsandIntersegmentEliminationsMember" xlink:label="loc_mrcy_SegmentReconcilingItemsandIntersegmentEliminationsMember_AD0735163EDDA5494DF5D0F935BA9B9D" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ConsolidationItemsDomain_3695276C09CB5B9CEECCD0F935BA8220" xlink:to="loc_mrcy_SegmentReconcilingItemsandIntersegmentEliminationsMember_AD0735163EDDA5494DF5D0F935BA9B9D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_F60708303FF0A177A936D0F935BAA00F" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable_02667123F9BC2CAE17E2D0F935BA6551" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_F60708303FF0A177A936D0F935BAA00F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_294402576BA892AC4BB2D0F935BAA6BA" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_F60708303FF0A177A936D0F935BAA00F" xlink:to="loc_us-gaap_SegmentDomain_294402576BA892AC4BB2D0F935BAA6BA" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_MercuryCommercialElectronicsMember" xlink:label="loc_mrcy_MercuryCommercialElectronicsMember_7A9ADC114D546667D36AD0F935BAF8CE" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentDomain_294402576BA892AC4BB2D0F935BAA6BA" xlink:to="loc_mrcy_MercuryCommercialElectronicsMember_7A9ADC114D546667D36AD0F935BAF8CE" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_MercuryDefenseSystemsMember" xlink:label="loc_mrcy_MercuryDefenseSystemsMember_846ED74D6958005AC366D0F935BA80E9" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentDomain_294402576BA892AC4BB2D0F935BAA6BA" xlink:to="loc_mrcy_MercuryDefenseSystemsMember_846ED74D6958005AC366D0F935BA80E9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SegmentReportingRevenueReconcilingItemLineItems" xlink:label="loc_us-gaap_SegmentReportingRevenueReconcilingItemLineItems_FA9DFE175F7BAFF2AE44D0F935BAF2BA" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable_02667123F9BC2CAE17E2D0F935BA6551" xlink:to="loc_us-gaap_SegmentReportingRevenueReconcilingItemLineItems_FA9DFE175F7BAFF2AE44D0F935BAF2BA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues_3DACE68ACD2A6533AC82D0F935BA8EF6" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingRevenueReconcilingItemLineItems_FA9DFE175F7BAFF2AE44D0F935BAF2BA" xlink:to="loc_us-gaap_Revenues_3DACE68ACD2A6533AC82D0F935BA8EF6" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization" xlink:label="loc_mrcy_AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization_406A5181B8BFD72BB81FD0F935BA36CF" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingRevenueReconcilingItemLineItems_FA9DFE175F7BAFF2AE44D0F935BAF2BA" xlink:to="loc_mrcy_AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization_406A5181B8BFD72BB81FD0F935BA36CF" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/OperatingSegmentGeographicInformationAndSignificantCustomersTables" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_6E7F3CEB2A1E40D5DF8DD0F934A27B3F" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_A0F79EC7D49AECCE19C3D0F934A2E0FA" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_6E7F3CEB2A1E40D5DF8DD0F934A27B3F" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_A0F79EC7D49AECCE19C3D0F934A2E0FA" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_ScheduleOfReconciliationOfNetIncomeTableTextBlock" xlink:label="loc_mrcy_ScheduleOfReconciliationOfNetIncomeTableTextBlock_A04A77591C1338E990CDD0F934A2F7FD" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_6E7F3CEB2A1E40D5DF8DD0F934A27B3F" xlink:to="loc_mrcy_ScheduleOfReconciliationOfNetIncomeTableTextBlock_A04A77591C1338E990CDD0F934A2F7FD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock_A45C0E5F55E31732603ED0F934A29C57" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_6E7F3CEB2A1E40D5DF8DD0F934A27B3F" xlink:to="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock_A45C0E5F55E31732603ED0F934A29C57" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfRevenueByMajorCustomersByReportingSegmentsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfRevenueByMajorCustomersByReportingSegmentsTableTextBlock_0045B13B86CDB57D4057D0F934A2482D" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_6E7F3CEB2A1E40D5DF8DD0F934A27B3F" xlink:to="loc_us-gaap_ScheduleOfRevenueByMajorCustomersByReportingSegmentsTableTextBlock_0045B13B86CDB57D4057D0F934A2482D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SchedulesOfConcentrationOfRiskByRiskFactorTextBlock" xlink:label="loc_us-gaap_SchedulesOfConcentrationOfRiskByRiskFactorTextBlock_05C950ADAAE7ADE9D289D0F934A221B5" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_6E7F3CEB2A1E40D5DF8DD0F934A27B3F" xlink:to="loc_us-gaap_SchedulesOfConcentrationOfRiskByRiskFactorTextBlock_05C950ADAAE7ADE9D289D0F934A221B5" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/RestructuringPlan" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RestructuringAndRelatedActivitiesAbstract" xlink:label="loc_us-gaap_RestructuringAndRelatedActivitiesAbstract_B8185559543EB7315922D0F934A63757" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock" xlink:label="loc_us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock_3054034216BF207FF0EAD0F934A6A6A6" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RestructuringAndRelatedActivitiesAbstract_B8185559543EB7315922D0F934A63757" xlink:to="loc_us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock_3054034216BF207FF0EAD0F934A6A6A6" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/RestructuringPlanAdditionalInformationDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherIncomeAndExpensesAbstract" xlink:label="loc_us-gaap_OtherIncomeAndExpensesAbstract_447A172070605BEFD7C3D0F933FE4DD6" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_D8DDE70B7900CA4D5A41D0F933FE0155" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherIncomeAndExpensesAbstract_447A172070605BEFD7C3D0F933FE4DD6" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_D8DDE70B7900CA4D5A41D0F933FE0155" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_266CC5E47B0A170BFF67D0F933FECD2E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_D8DDE70B7900CA4D5A41D0F933FE0155" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_266CC5E47B0A170BFF67D0F933FECD2E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_8B8D7C4A526504269055D0F933FE1E66" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_266CC5E47B0A170BFF67D0F933FECD2E" xlink:to="loc_us-gaap_SegmentDomain_8B8D7C4A526504269055D0F933FE1E66" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_MercuryCommercialElectronicsMember" xlink:label="loc_mrcy_MercuryCommercialElectronicsMember_EA8771E48C5819008FE7D0F933FEA8C9" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentDomain_8B8D7C4A526504269055D0F933FE1E66" xlink:to="loc_mrcy_MercuryCommercialElectronicsMember_EA8771E48C5819008FE7D0F933FEA8C9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RestructuringCostAndReserveLineItems" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_03EEBE31E88B7FADFD42D0F933FE38EC" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_D8DDE70B7900CA4D5A41D0F933FE0155" xlink:to="loc_us-gaap_RestructuringCostAndReserveLineItems_03EEBE31E88B7FADFD42D0F933FE38EC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RestructuringReserveCurrent" xlink:label="loc_us-gaap_RestructuringReserveCurrent_3BB0DEE10161F35249ABD0F933FEBB07" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_03EEBE31E88B7FADFD42D0F933FE38EC" xlink:to="loc_us-gaap_RestructuringReserveCurrent_3BB0DEE10161F35249ABD0F933FEBB07" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RestructuringCharges" xlink:label="loc_us-gaap_RestructuringCharges_2F5A7CA3D5CA925FD5EFD0F933FEB958" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/positiveLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_03EEBE31E88B7FADFD42D0F933FE38EC" xlink:to="loc_us-gaap_RestructuringCharges_2F5A7CA3D5CA925FD5EFD0F933FEB958" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/RestructuringPlanTables" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RestructuringAndRelatedActivitiesAbstract" xlink:label="loc_us-gaap_RestructuringAndRelatedActivitiesAbstract_A1F6C6125EA109B6EC7CD0F933CA6A7D" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfRestructuringReserveByTypeOfCostTextBlock" xlink:label="loc_us-gaap_ScheduleOfRestructuringReserveByTypeOfCostTextBlock_B4F9E9CC0DD7E745940CD0F933CA1615" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RestructuringAndRelatedActivitiesAbstract_A1F6C6125EA109B6EC7CD0F933CA6A7D" xlink:to="loc_us-gaap_ScheduleOfRestructuringReserveByTypeOfCostTextBlock_B4F9E9CC0DD7E745940CD0F933CA1615" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/StockBasedCompensation" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_943F76986BF11EF4C8B3D0F935A13D06" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_9D921873E1293B6F550FD0F935A19884" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_943F76986BF11EF4C8B3D0F935A13D06" xlink:to="loc_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_9D921873E1293B6F550FD0F935A19884" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/StockBasedCompensationAdditionalInformationDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_3F5474E46533257ED75A7A2D7F9E038B" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_F9EE94CF8BFE034A71D47A2D7F9EFB24" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_3F5474E46533257ED75A7A2D7F9E038B" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_F9EE94CF8BFE034A71D47A2D7F9EFB24" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_TitleOfIndividualAxis" xlink:label="loc_us-gaap_TitleOfIndividualAxis_E123EF29CE31BE0A12607A2D7F9FCFB2" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_F9EE94CF8BFE034A71D47A2D7F9EFB24" xlink:to="loc_us-gaap_TitleOfIndividualAxis_E123EF29CE31BE0A12607A2D7F9FCFB2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_TitleOfIndividualWithRelationshipToEntityDomain" xlink:label="loc_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_8B9795798BFF98C783EC7A2D7F9F16D2" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TitleOfIndividualAxis_E123EF29CE31BE0A12607A2D7F9FCFB2" xlink:to="loc_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_8B9795798BFF98C783EC7A2D7F9F16D2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ExecutiveOfficerMember" xlink:label="loc_us-gaap_ExecutiveOfficerMember_60066EA37683385E97B27A2D7F9F0ACA" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_8B9795798BFF98C783EC7A2D7F9F16D2" xlink:to="loc_us-gaap_ExecutiveOfficerMember_60066EA37683385E97B27A2D7F9F0ACA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_VicePresidentMember" xlink:label="loc_us-gaap_VicePresidentMember_1DB28FC925F6F4E5290B7A2D7F9F0E11" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_8B9795798BFF98C783EC7A2D7F9F16D2" xlink:to="loc_us-gaap_VicePresidentMember_1DB28FC925F6F4E5290B7A2D7F9F0E11" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PlanNameAxis" xlink:label="loc_us-gaap_PlanNameAxis_B13F37CAB7EFCCD89EA47A2D7FA0E91F" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_F9EE94CF8BFE034A71D47A2D7F9EFB24" xlink:to="loc_us-gaap_PlanNameAxis_B13F37CAB7EFCCD89EA47A2D7FA0E91F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PlanNameDomain" xlink:label="loc_us-gaap_PlanNameDomain_F195F53715BA0E994A6E7A2D7FA00D02" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PlanNameAxis_B13F37CAB7EFCCD89EA47A2D7FA0E91F" xlink:to="loc_us-gaap_PlanNameDomain_F195F53715BA0E994A6E7A2D7FA00D02" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_StockOptionPlanTwentyZeroFiveMember" xlink:label="loc_mrcy_StockOptionPlanTwentyZeroFiveMember_6F53BE193F6C82DB35737A2D7FA02558" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PlanNameDomain_F195F53715BA0E994A6E7A2D7FA00D02" xlink:to="loc_mrcy_StockOptionPlanTwentyZeroFiveMember_6F53BE193F6C82DB35737A2D7FA02558" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_18DAD869B7451470CAB77A2D7FA18A80" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_F9EE94CF8BFE034A71D47A2D7F9EFB24" xlink:to="loc_us-gaap_AwardTypeAxis_18DAD869B7451470CAB77A2D7FA18A80" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_171D8629C571DFEB4F9C7A2D7FA11C6B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AwardTypeAxis_18DAD869B7451470CAB77A2D7FA18A80" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_171D8629C571DFEB4F9C7A2D7FA11C6B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PerformanceSharesMember" xlink:label="loc_us-gaap_PerformanceSharesMember_D20DEA04C777AE4AF7897A2D7FA100A0" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_171D8629C571DFEB4F9C7A2D7FA11C6B" xlink:to="loc_us-gaap_PerformanceSharesMember_D20DEA04C777AE4AF7897A2D7FA100A0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EmployeeStockMember" xlink:label="loc_us-gaap_EmployeeStockMember_8A812AC0B24E091B69117A2D7FA27D4F" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_171D8629C571DFEB4F9C7A2D7FA11C6B" xlink:to="loc_us-gaap_EmployeeStockMember_8A812AC0B24E091B69117A2D7FA27D4F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RestrictedStockMember" xlink:label="loc_us-gaap_RestrictedStockMember_DCBD42413D5607F9C8F27A2D7FA29365" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_171D8629C571DFEB4F9C7A2D7FA11C6B" xlink:to="loc_us-gaap_RestrictedStockMember_DCBD42413D5607F9C8F27A2D7FA29365" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_AD2C7758F7E64B64C2E57A2D7FA24A80" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_F9EE94CF8BFE034A71D47A2D7F9EFB24" xlink:to="loc_us-gaap_RangeAxis_AD2C7758F7E64B64C2E57A2D7FA24A80" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_3B8944CF4703A0D83A3B7A2D7FA2B8C0" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeAxis_AD2C7758F7E64B64C2E57A2D7FA24A80" xlink:to="loc_us-gaap_RangeMember_3B8944CF4703A0D83A3B7A2D7FA2B8C0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_0D513F8D2A9F0A3934BE7A2D7FA22919" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_3B8944CF4703A0D83A3B7A2D7FA2B8C0" xlink:to="loc_us-gaap_MaximumMember_0D513F8D2A9F0A3934BE7A2D7FA22919" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_E3F49ADF238BE3AD960D7A2D7FA3C1BA" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_F9EE94CF8BFE034A71D47A2D7F9EFB24" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_E3F49ADF238BE3AD960D7A2D7FA3C1BA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_ED785C8558FEFE5A37507A5451B8BB2F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_E3F49ADF238BE3AD960D7A2D7FA3C1BA" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_ED785C8558FEFE5A37507A5451B8BB2F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_99FDBA4C1EBB9AE2DEEB7A2D7FA3197E" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_E3F49ADF238BE3AD960D7A2D7FA3C1BA" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_99FDBA4C1EBB9AE2DEEB7A2D7FA3197E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized_4001772BFDBA844FD6E97A2D7FA3237B" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_E3F49ADF238BE3AD960D7A2D7FA3C1BA" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized_4001772BFDBA844FD6E97A2D7FA3237B" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_MinimumGrantDateFairValueOfNonqualifiedStockOptionsAsPercentageOfFairValueOfCommonStock" xlink:label="loc_mrcy_MinimumGrantDateFairValueOfNonqualifiedStockOptionsAsPercentageOfFairValueOfCommonStock_7D043567CB8D657CD4ED7A2D7FA35128" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_E3F49ADF238BE3AD960D7A2D7FA3C1BA" xlink:to="loc_mrcy_MinimumGrantDateFairValueOfNonqualifiedStockOptionsAsPercentageOfFairValueOfCommonStock_7D043567CB8D657CD4ED7A2D7FA35128" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_ShareBasedCompensationArrangementByShareBasedPaymentAwardContractualLife" xlink:label="loc_mrcy_ShareBasedCompensationArrangementByShareBasedPaymentAwardContractualLife_E9A0CD43E208E2DA31377A2D7FA479FF" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_E3F49ADF238BE3AD960D7A2D7FA3C1BA" xlink:to="loc_mrcy_ShareBasedCompensationArrangementByShareBasedPaymentAwardContractualLife_E9A0CD43E208E2DA31377A2D7FA479FF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_033552430E0A5DDE3F377A2D7FA4668C" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_E3F49ADF238BE3AD960D7A2D7FA3C1BA" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_033552430E0A5DDE3F377A2D7FA4668C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_41FC636316A4824629437A2D7FA50D93" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_E3F49ADF238BE3AD960D7A2D7FA3C1BA" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_41FC636316A4824629437A2D7FA50D93" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPriceOfferingDate" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPriceOfferingDate_505ACDD4C6F9F3851EE87A2D7FA53B23" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_E3F49ADF238BE3AD960D7A2D7FA3C1BA" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPriceOfferingDate_505ACDD4C6F9F3851EE87A2D7FA53B23" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_EmployeeStockPurchasePlanMaximumPercentageOfCompensationToPurchaseSharesByEligibleParticipants" xlink:label="loc_mrcy_EmployeeStockPurchasePlanMaximumPercentageOfCompensationToPurchaseSharesByEligibleParticipants_924BAE54C06CBE9FC81F7A2D7FA55FD4" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_E3F49ADF238BE3AD960D7A2D7FA3C1BA" xlink:to="loc_mrcy_EmployeeStockPurchasePlanMaximumPercentageOfCompensationToPurchaseSharesByEligibleParticipants_924BAE54C06CBE9FC81F7A2D7FA55FD4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod_E5D68767C0B34449C3C17A2D7FA5A170" xlink:type="locator" />
    <presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_E3F49ADF238BE3AD960D7A2D7FA3C1BA" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod_E5D68767C0B34449C3C17A2D7FA5A170" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/StockBasedCompensationExpensesDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_92C6854A37BA3B2DE47FD0F935D1289D" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_534C1D57B5FA620E01F2D0F935D157BF" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_92C6854A37BA3B2DE47FD0F935D1289D" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_534C1D57B5FA620E01F2D0F935D157BF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_222292D42395A2C5FB35D0F935D1EDC5" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_534C1D57B5FA620E01F2D0F935D157BF" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_222292D42395A2C5FB35D0F935D1EDC5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_B6B0C1EDFD26AC166CE7D0F935D1F4E3" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_222292D42395A2C5FB35D0F935D1EDC5" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_B6B0C1EDFD26AC166CE7D0F935D1F4E3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CostOfSalesMember" xlink:label="loc_us-gaap_CostOfSalesMember_A0E9ACCD244AF80472A1D0F935D1B199" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_B6B0C1EDFD26AC166CE7D0F935D1F4E3" xlink:to="loc_us-gaap_CostOfSalesMember_A0E9ACCD244AF80472A1D0F935D1B199" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesMember" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_E644CE35DB5DE37E498DD0F935D134B4" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_B6B0C1EDFD26AC166CE7D0F935D1F4E3" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_E644CE35DB5DE37E498DD0F935D134B4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ResearchAndDevelopmentExpenseMember" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpenseMember_05BEA1E9ABE6887D8453D0F935D19D0E" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_B6B0C1EDFD26AC166CE7D0F935D1F4E3" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpenseMember_05BEA1E9ABE6887D8453D0F935D19D0E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_E58F17348D5C647C8A87D0F935D182B3" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_534C1D57B5FA620E01F2D0F935D157BF" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_E58F17348D5C647C8A87D0F935D182B3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_B38E3794275EA528FBB5D0F935D1C969" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_E58F17348D5C647C8A87D0F935D182B3" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_B38E3794275EA528FBB5D0F935D1C969" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_0B6C061E33D39173F731D0F935D1A738" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_E58F17348D5C647C8A87D0F935D182B3" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_0B6C061E33D39173F731D0F935D1A738" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax_D52B264E1CAC112EB5F1D0F935D14C97" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_E58F17348D5C647C8A87D0F935D182B3" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax_D52B264E1CAC112EB5F1D0F935D14C97" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/StockBasedCompensationTables" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_CFF49187BABB6B383719D0F93626ED02" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_7574293055205352BF1BD0F93626E1A6" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_CFF49187BABB6B383719D0F93626ED02" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_7574293055205352BF1BD0F93626E1A6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfNonvestedShareActivityTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfNonvestedShareActivityTableTextBlock_3195F3AAF089BF24351ED0F93626805E" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_CFF49187BABB6B383719D0F93626ED02" xlink:to="loc_us-gaap_ScheduleOfNonvestedShareActivityTableTextBlock_3195F3AAF089BF24351ED0F93626805E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock" xlink:label="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock_6945E098E8F76A560BE8D0F936268581" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_CFF49187BABB6B383719D0F93626ED02" xlink:to="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock_6945E098E8F76A560BE8D0F936268581" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/SubsequentEvents" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SubsequentEventsAbstract" xlink:label="loc_us-gaap_SubsequentEventsAbstract_0DF0307CFF0624BA136CD0F9348AE8ED" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SubsequentEventsTextBlock" xlink:label="loc_us-gaap_SubsequentEventsTextBlock_68091B9AF16147E2FC7ED0F9348A9BA7" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventsAbstract_0DF0307CFF0624BA136CD0F9348AE8ED" xlink:to="loc_us-gaap_SubsequentEventsTextBlock_68091B9AF16147E2FC7ED0F9348A9BA7" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/SubsequentEventsDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SubsequentEventsAbstract" xlink:label="loc_us-gaap_SubsequentEventsAbstract_C23B9EC982E690C4DFD97BED42AD2BBD" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SubsequentEventTable" xlink:label="loc_us-gaap_SubsequentEventTable_3AD0B426BE547DD011EB7BED42ADA61B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventsAbstract_C23B9EC982E690C4DFD97BED42AD2BBD" xlink:to="loc_us-gaap_SubsequentEventTable_3AD0B426BE547DD011EB7BED42ADA61B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_341C8C165533766D6AC97BED42AD3347" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventTable_3AD0B426BE547DD011EB7BED42ADA61B" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_341C8C165533766D6AC97BED42AD3347" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_81809B38BB11FBCF85357BED42AD63D0" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_341C8C165533766D6AC97BED42AD3347" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_81809B38BB11FBCF85357BED42AD63D0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SecuredDebtMember" xlink:label="loc_us-gaap_SecuredDebtMember_A30510BBDC087410DBD07BED42ADD84B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_81809B38BB11FBCF85357BED42AD63D0" xlink:to="loc_us-gaap_SecuredDebtMember_A30510BBDC087410DBD07BED42ADD84B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="loc_us-gaap_DebtInstrumentAxis_5AB7E1683D481986F22F7BED42AEE027" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventTable_3AD0B426BE547DD011EB7BED42ADA61B" xlink:to="loc_us-gaap_DebtInstrumentAxis_5AB7E1683D481986F22F7BED42AEE027" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_E6BF5D2B234CE7ADFEF17BED42AE623E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentAxis_5AB7E1683D481986F22F7BED42AEE027" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_E6BF5D2B234CE7ADFEF17BED42AE623E" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_TermLoanAMember" xlink:label="loc_mrcy_TermLoanAMember_77B70509BBEC0B7F0C377BED42AE3310" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_E6BF5D2B234CE7ADFEF17BED42AE623E" xlink:to="loc_mrcy_TermLoanAMember_77B70509BBEC0B7F0C377BED42AE3310" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SubsidiarySaleOfStockAxis" xlink:label="loc_us-gaap_SubsidiarySaleOfStockAxis_0763A3BE1487FB11C1E97BED42AEEAA8" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventTable_3AD0B426BE547DD011EB7BED42ADA61B" xlink:to="loc_us-gaap_SubsidiarySaleOfStockAxis_0763A3BE1487FB11C1E97BED42AEEAA8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SaleOfStockNameOfTransactionDomain" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_3CBCF0F53E81D49BCBFA7BED42AE9AD5" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis_0763A3BE1487FB11C1E97BED42AEEAA8" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_3CBCF0F53E81D49BCBFA7BED42AE9AD5" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_UnderwrittenPublicOfferingMember" xlink:label="loc_mrcy_UnderwrittenPublicOfferingMember_CBC3E1EBD87226CCD9387BED42AE317F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_3CBCF0F53E81D49BCBFA7BED42AE9AD5" xlink:to="loc_mrcy_UnderwrittenPublicOfferingMember_CBC3E1EBD87226CCD9387BED42AE317F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OverAllotmentOptionMember" xlink:label="loc_us-gaap_OverAllotmentOptionMember_90CC143E0F71DFC7A28D7BED42AEC0AC" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_3CBCF0F53E81D49BCBFA7BED42AE9AD5" xlink:to="loc_us-gaap_OverAllotmentOptionMember_90CC143E0F71DFC7A28D7BED42AEC0AC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_6D7A1FA51E3F2B172A967BED42AE7184" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventTable_3AD0B426BE547DD011EB7BED42ADA61B" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_6D7A1FA51E3F2B172A967BED42AE7184" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_7DAC85A83E34364295C67BED42AE64D9" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_6D7A1FA51E3F2B172A967BED42AE7184" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_7DAC85A83E34364295C67BED42AE64D9" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_CarveOutBusinessMember" xlink:label="loc_mrcy_CarveOutBusinessMember_2099D055BE7A485D1E047BED42AE5361" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_7DAC85A83E34364295C67BED42AE64D9" xlink:to="loc_mrcy_CarveOutBusinessMember_2099D055BE7A485D1E047BED42AE5361" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CreditFacilityAxis" xlink:label="loc_us-gaap_CreditFacilityAxis_55536FD197BF7CFCA1977BED42AE5E02" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventTable_3AD0B426BE547DD011EB7BED42ADA61B" xlink:to="loc_us-gaap_CreditFacilityAxis_55536FD197BF7CFCA1977BED42AE5E02" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_1FCCED3DF2F56DD4EC207BED42AEED68" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CreditFacilityAxis_55536FD197BF7CFCA1977BED42AE5E02" xlink:to="loc_us-gaap_CreditFacilityDomain_1FCCED3DF2F56DD4EC207BED42AEED68" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RevolvingCreditFacilityMember" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_907892151C1D4EB11A837BED42AEB1B2" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CreditFacilityDomain_1FCCED3DF2F56DD4EC207BED42AEED68" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_907892151C1D4EB11A837BED42AEB1B2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_013D5A77F4026505E3567BED42AE4FA4" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventTable_3AD0B426BE547DD011EB7BED42ADA61B" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_013D5A77F4026505E3567BED42AE4FA4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_7A36D5CB88453ABA3D6B7BED42AEA122" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_013D5A77F4026505E3567BED42AE4FA4" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_7A36D5CB88453ABA3D6B7BED42AEA122" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SubsequentEventMember" xlink:label="loc_us-gaap_SubsequentEventMember_A254896631C291C01A157BED42AEA95A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_7A36D5CB88453ABA3D6B7BED42AEA122" xlink:to="loc_us-gaap_SubsequentEventMember_A254896631C291C01A157BED42AEA95A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SubsequentEventLineItems" xlink:label="loc_us-gaap_SubsequentEventLineItems_9BA61774A3F09C9C86B87BED42AE66A4" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventTable_3AD0B426BE547DD011EB7BED42ADA61B" xlink:to="loc_us-gaap_SubsequentEventLineItems_9BA61774A3F09C9C86B87BED42AE66A4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesGross" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_D7F393DB99EC6E1251D57BED42AF9160" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventLineItems_9BA61774A3F09C9C86B87BED42AE66A4" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_D7F393DB99EC6E1251D57BED42AF9160" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_6B346F14AE971BF02ED67BED42AF3129" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventLineItems_9BA61774A3F09C9C86B87BED42AE66A4" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_6B346F14AE971BF02ED67BED42AF3129" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_F9249F2B29C8707565F67BED42AFC50B" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventLineItems_9BA61774A3F09C9C86B87BED42AE66A4" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_F9249F2B29C8707565F67BED42AFC50B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SaleOfStockConsiderationReceivedOnTransaction" xlink:label="loc_us-gaap_SaleOfStockConsiderationReceivedOnTransaction_FAC7FF76B9F8BE606BCD7BED42AF6D68" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventLineItems_9BA61774A3F09C9C86B87BED42AE66A4" xlink:to="loc_us-gaap_SaleOfStockConsiderationReceivedOnTransaction_FAC7FF76B9F8BE606BCD7BED42AF6D68" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:label="loc_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_3E25870DFA8E25185BC37BED42AF8263" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventLineItems_9BA61774A3F09C9C86B87BED42AE66A4" xlink:to="loc_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_3E25870DFA8E25185BC37BED42AF8263" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_561D1C304D4C060A75C07BED42AF7895" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventLineItems_9BA61774A3F09C9C86B87BED42AE66A4" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_561D1C304D4C060A75C07BED42AF7895" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RestructuringCharges" xlink:label="loc_us-gaap_RestructuringCharges_6A47DDBB6FB4901A41827BED42AF6E45" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventLineItems_9BA61774A3F09C9C86B87BED42AE66A4" xlink:to="loc_us-gaap_RestructuringCharges_6A47DDBB6FB4901A41827BED42AF6E45" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts" xlink:label="loc_us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts_3C15445DC5425FF7556C7BED42AF336E" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventLineItems_9BA61774A3F09C9C86B87BED42AE66A4" xlink:to="loc_us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts_3C15445DC5425FF7556C7BED42AF336E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PaymentsOfStockIssuanceCosts" xlink:label="loc_us-gaap_PaymentsOfStockIssuanceCosts_88F737A3CB6833A5DE5E7BED42AF5CB7" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventLineItems_9BA61774A3F09C9C86B87BED42AE66A4" xlink:to="loc_us-gaap_PaymentsOfStockIssuanceCosts_88F737A3CB6833A5DE5E7BED42AF5CB7" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_SaleofStockExpectedAdditionalIssuanceCosts" xlink:label="loc_mrcy_SaleofStockExpectedAdditionalIssuanceCosts_73124BAD0AFA244E19F97BED42AFE699" xlink:type="locator" />
    <presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventLineItems_9BA61774A3F09C9C86B87BED42AE66A4" xlink:to="loc_mrcy_SaleofStockExpectedAdditionalIssuanceCosts_73124BAD0AFA244E19F97BED42AFE699" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/SummaryOfNonvestedRestrictedStockDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_D1DDC3B7845BC73508EBD0F935E05645" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_FC5AE58599C6A2DE4F95D0F935E0A8EF" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_D1DDC3B7845BC73508EBD0F935E05645" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_FC5AE58599C6A2DE4F95D0F935E0A8EF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_D50FAF61326287F80A8DD0F935E03FB2" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_FC5AE58599C6A2DE4F95D0F935E0A8EF" xlink:to="loc_us-gaap_AwardTypeAxis_D50FAF61326287F80A8DD0F935E03FB2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_177D4AC0E9CD6C895C5BD0F935E07BB7" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AwardTypeAxis_D50FAF61326287F80A8DD0F935E03FB2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_177D4AC0E9CD6C895C5BD0F935E07BB7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RestrictedStockMember" xlink:label="loc_us-gaap_RestrictedStockMember_00FBF05D6648E9317AEED0F935E08528" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_177D4AC0E9CD6C895C5BD0F935E07BB7" xlink:to="loc_us-gaap_RestrictedStockMember_00FBF05D6648E9317AEED0F935E08528" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_F390B3A51F35F38C1396D0F935E0099F" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_FC5AE58599C6A2DE4F95D0F935E0A8EF" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_F390B3A51F35F38C1396D0F935E0099F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_9FBD6A3F122C9A84BC9DD0F935E0262C" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_F390B3A51F35F38C1396D0F935E0099F" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_9FBD6A3F122C9A84BC9DD0F935E0262C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_670B002279FCD3D92901D0F935E03AE8" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_9FBD6A3F122C9A84BC9DD0F935E0262C" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_670B002279FCD3D92901D0F935E03AE8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_59289F93D5BBCE2BE18DD0F935E1536F" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_9FBD6A3F122C9A84BC9DD0F935E0262C" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_59289F93D5BBCE2BE18DD0F935E1536F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_F6AD5C45DB3D13AC74E9D0F935E10505" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_9FBD6A3F122C9A84BC9DD0F935E0262C" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_F6AD5C45DB3D13AC74E9D0F935E10505" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_3C0E7078DC747D2ED8E8D0F935E18D30" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_9FBD6A3F122C9A84BC9DD0F935E0262C" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_3C0E7078DC747D2ED8E8D0F935E18D30" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_D2E316402C970F4744E5D0F935E1F113" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_9FBD6A3F122C9A84BC9DD0F935E0262C" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_D2E316402C970F4744E5D0F935E1F113" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_FDEB39424AFAA57DE25ED0F935E1723F" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_F390B3A51F35F38C1396D0F935E0099F" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_FDEB39424AFAA57DE25ED0F935E1723F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_A5065813E1AE1D299149D0F935E1A7D5" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_FDEB39424AFAA57DE25ED0F935E1723F" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_A5065813E1AE1D299149D0F935E1A7D5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_BCD9813AE0A28623BB9CD0F935E10534" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_FDEB39424AFAA57DE25ED0F935E1723F" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_BCD9813AE0A28623BB9CD0F935E10534" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_41464DD14529760C1880D0F935E10591" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_FDEB39424AFAA57DE25ED0F935E1723F" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_41464DD14529760C1880D0F935E10591" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_01206C5F1AE3FB70A101D0F935E14E35" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_FDEB39424AFAA57DE25ED0F935E1723F" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_01206C5F1AE3FB70A101D0F935E14E35" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_7068D34C9927AA8DF846D0F935E1A750" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_FDEB39424AFAA57DE25ED0F935E1723F" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_7068D34C9927AA8DF846D0F935E1A750" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/SummaryOfSignificantAccountingPolicies" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_14344BE86D7531973A10D0F933F71A8C" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SignificantAccountingPoliciesTextBlock" xlink:label="loc_us-gaap_SignificantAccountingPoliciesTextBlock_B8790C76710070D4426ED0F933F741FD" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_14344BE86D7531973A10D0F933F71A8C" xlink:to="loc_us-gaap_SignificantAccountingPoliciesTextBlock_B8790C76710070D4426ED0F933F741FD" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/SummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_59031784A866F8ADB508D0F93469138C" xlink:type="locator" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_SignificantAccountingPoliciesTable" xlink:label="loc_mrcy_SignificantAccountingPoliciesTable_670CDF65D7BDD06156A4D0F934695D47" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_59031784A866F8ADB508D0F93469138C" xlink:to="loc_mrcy_SignificantAccountingPoliciesTable_670CDF65D7BDD06156A4D0F934695D47" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredRevenueArrangementTypeAxis" xlink:label="loc_us-gaap_DeferredRevenueArrangementTypeAxis_F6EE85271AE86F100D13D0F93469B249" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mrcy_SignificantAccountingPoliciesTable_670CDF65D7BDD06156A4D0F934695D47" xlink:to="loc_us-gaap_DeferredRevenueArrangementTypeAxis_F6EE85271AE86F100D13D0F93469B249" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredRevenueArrangementTypeDomain" xlink:label="loc_us-gaap_DeferredRevenueArrangementTypeDomain_B55DDA340D317F2CD407D0F934691B23" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DeferredRevenueArrangementTypeAxis_F6EE85271AE86F100D13D0F93469B249" xlink:to="loc_us-gaap_DeferredRevenueArrangementTypeDomain_B55DDA340D317F2CD407D0F934691B23" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_MultipleDeliveryRevenueMember" xlink:label="loc_mrcy_MultipleDeliveryRevenueMember_48D947C92575D6AD5A78D0F934695972" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DeferredRevenueArrangementTypeDomain_B55DDA340D317F2CD407D0F934691B23" xlink:to="loc_mrcy_MultipleDeliveryRevenueMember_48D947C92575D6AD5A78D0F934695972" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_SignificantAccountingPoliciesLineItems" xlink:label="loc_mrcy_SignificantAccountingPoliciesLineItems_29AABE7E97A11F07A30ED0F9346934A1" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mrcy_SignificantAccountingPoliciesTable_670CDF65D7BDD06156A4D0F934695D47" xlink:to="loc_mrcy_SignificantAccountingPoliciesLineItems_29AABE7E97A11F07A30ED0F9346934A1" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_PercentageOfRevenueRecognized" xlink:label="loc_mrcy_PercentageOfRevenueRecognized_A2E383F96E050A49C939D0F93469C04A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mrcy_SignificantAccountingPoliciesLineItems_29AABE7E97A11F07A30ED0F9346934A1" xlink:to="loc_mrcy_PercentageOfRevenueRecognized_A2E383F96E050A49C939D0F93469C04A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_05959244795DB29A46A5D0F93469FD0F" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mrcy_SignificantAccountingPoliciesLineItems_29AABE7E97A11F07A30ED0F9346934A1" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_05959244795DB29A46A5D0F93469FD0F" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/SummaryOfSignificantAccountingPoliciesPolicies" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_2BCB95D75B9F0DD3F05FD0F935A83256" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BasisOfAccountingPolicyPolicyTextBlock" xlink:label="loc_us-gaap_BasisOfAccountingPolicyPolicyTextBlock_5DB24B3FA3F11833A4B6D0F935A8D0D1" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_2BCB95D75B9F0DD3F05FD0F935A83256" xlink:to="loc_us-gaap_BasisOfAccountingPolicyPolicyTextBlock_5DB24B3FA3F11833A4B6D0F935A8D0D1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationsPolicy" xlink:label="loc_us-gaap_BusinessCombinationsPolicy_EE4A8D7DBF41E56DA86DD0F935A875A7" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_2BCB95D75B9F0DD3F05FD0F935A83256" xlink:to="loc_us-gaap_BusinessCombinationsPolicy_EE4A8D7DBF41E56DA86DD0F935A875A7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_UseOfEstimates" xlink:label="loc_us-gaap_UseOfEstimates_CC5F2EC11E390C040D4AD0F935A85624" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_2BCB95D75B9F0DD3F05FD0F935A83256" xlink:to="loc_us-gaap_UseOfEstimates_CC5F2EC11E390C040D4AD0F935A85624" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RevenueRecognitionPolicyTextBlock" xlink:label="loc_us-gaap_RevenueRecognitionPolicyTextBlock_167BF0F2FAC574C22627D0F935A8C8D6" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_2BCB95D75B9F0DD3F05FD0F935A83256" xlink:to="loc_us-gaap_RevenueRecognitionPolicyTextBlock_167BF0F2FAC574C22627D0F935A8C8D6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EarningsPerSharePolicyTextBlock" xlink:label="loc_us-gaap_EarningsPerSharePolicyTextBlock_F872E22D8C4A1D476A9BD0F935A8263F" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_2BCB95D75B9F0DD3F05FD0F935A83256" xlink:to="loc_us-gaap_EarningsPerSharePolicyTextBlock_F872E22D8C4A1D476A9BD0F935A8263F" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/SummaryOfSignificantAccountingPoliciesTables" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_E3DBED9FB165C57D69CBD0F93460EB61" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfWeightedAverageNumberOfSharesTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfWeightedAverageNumberOfSharesTableTextBlock_93C5C2129337818912BED0F934612D50" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_E3DBED9FB165C57D69CBD0F93460EB61" xlink:to="loc_us-gaap_ScheduleOfWeightedAverageNumberOfSharesTableTextBlock_93C5C2129337818912BED0F934612D50" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.mrcy.com/role/SummaryOfStockOptionPlansDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_7F73DFBBBDC8B22360A2D0F93576FAF4" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_8D002CA3696863B29B67D0F93576CAF9" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_7F73DFBBBDC8B22360A2D0F93576FAF4" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_8D002CA3696863B29B67D0F93576CAF9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PlanNameAxis" xlink:label="loc_us-gaap_PlanNameAxis_A6D601B562506D87259FD0F935766A70" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_8D002CA3696863B29B67D0F93576CAF9" xlink:to="loc_us-gaap_PlanNameAxis_A6D601B562506D87259FD0F935766A70" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PlanNameDomain" xlink:label="loc_us-gaap_PlanNameDomain_D79706B06F2B24C06B0AD0F935765E13" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PlanNameAxis_A6D601B562506D87259FD0F935766A70" xlink:to="loc_us-gaap_PlanNameDomain_D79706B06F2B24C06B0AD0F935765E13" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_StockOptionPlanTwentyZeroFiveMember" xlink:label="loc_mrcy_StockOptionPlanTwentyZeroFiveMember_77C362F1923FC322F11ED0F93576D525" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PlanNameDomain_D79706B06F2B24C06B0AD0F935765E13" xlink:to="loc_mrcy_StockOptionPlanTwentyZeroFiveMember_77C362F1923FC322F11ED0F93576D525" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_35591173A3D65B782052D0F93576C454" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_8D002CA3696863B29B67D0F93576CAF9" xlink:to="loc_us-gaap_AwardTypeAxis_35591173A3D65B782052D0F93576C454" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_F377CD31D3DC8BA9AFC1D0F935765B5E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AwardTypeAxis_35591173A3D65B782052D0F93576C454" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_F377CD31D3DC8BA9AFC1D0F935765B5E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EmployeeStockMember" xlink:label="loc_us-gaap_EmployeeStockMember_D08A23FEAA54008D7A38D0F93576E683" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_F377CD31D3DC8BA9AFC1D0F935765B5E" xlink:to="loc_us-gaap_EmployeeStockMember_D08A23FEAA54008D7A38D0F93576E683" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="loc_us-gaap_EmployeeStockOptionMember_BFA7A8B6618C37D9391AD0F935774CFB" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_F377CD31D3DC8BA9AFC1D0F935765B5E" xlink:to="loc_us-gaap_EmployeeStockOptionMember_BFA7A8B6618C37D9391AD0F935774CFB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_5903DEAD92916A4B3ED3D0F935772CD1" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_8D002CA3696863B29B67D0F93576CAF9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_5903DEAD92916A4B3ED3D0F935772CD1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized_4FFB3B07FC2D9B6800E6D0F9357752D8" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_5903DEAD92916A4B3ED3D0F935772CD1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized_4FFB3B07FC2D9B6800E6D0F9357752D8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_E7D08EE5BC00A47940B4D0F935773D55" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_5903DEAD92916A4B3ED3D0F935772CD1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_E7D08EE5BC00A47940B4D0F935773D55" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_3DAE44CEFB907D6419FED0F93577FED0" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_E7D08EE5BC00A47940B4D0F935773D55" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_3DAE44CEFB907D6419FED0F93577FED0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod_4C244958B5159805AB76D0F9357703C8" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_E7D08EE5BC00A47940B4D0F935773D55" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod_4C244958B5159805AB76D0F9357703C8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_5844895423950004F493D0F93577C5F0" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_E7D08EE5BC00A47940B4D0F935773D55" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_5844895423950004F493D0F93577C5F0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod_D9AF34E6D4A87B97B223D0F935777B48" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_E7D08EE5BC00A47940B4D0F935773D55" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod_D9AF34E6D4A87B97B223D0F935777B48" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_9FC5EE98C40543C1BA6ED0F93577BC8E" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_E7D08EE5BC00A47940B4D0F935773D55" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_9FC5EE98C40543C1BA6ED0F93577BC8E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_301E38920D44137F8317D0F93577A407" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_5903DEAD92916A4B3ED3D0F935772CD1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_301E38920D44137F8317D0F93577A407" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_BFEF5C1B174D0E9B054CD0F93577F315" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_301E38920D44137F8317D0F93577A407" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_BFEF5C1B174D0E9B054CD0F93577F315" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_4E99CBAC2D31E85E039CD0F935785905" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_301E38920D44137F8317D0F93577A407" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_4E99CBAC2D31E85E039CD0F935785905" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_50D7B3E448395793416FD0F935789A42" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_301E38920D44137F8317D0F93577A407" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_50D7B3E448395793416FD0F935789A42" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice_B834BB70F6EA953A117AD0F935787CEB" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_301E38920D44137F8317D0F93577A407" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice_B834BB70F6EA953A117AD0F935787CEB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_AF252EA50C4A6B24DB25D0F935780E0F" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_301E38920D44137F8317D0F93577A407" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_AF252EA50C4A6B24DB25D0F935780E0F" xlink:type="arc" />
    <loc xlink:href="mrcy-20160331.xsd#mrcy_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract" xlink:label="loc_mrcy_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract_4CAA2494902FAF3A8F3ED0F935786931" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_5903DEAD92916A4B3ED3D0F935772CD1" xlink:to="loc_mrcy_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract_4CAA2494902FAF3A8F3ED0F935786931" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_3847EAF7A681B2A0328CD0F935785E2D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mrcy_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract_4CAA2494902FAF3A8F3ED0F935786931" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_3847EAF7A681B2A0328CD0F935785E2D" xlink:type="arc" />
  </presentationLink>
</linkbase>
