<?xml version="1.0" encoding="US-ASCII"?>
<!--XBRL Document Created with Wdesk from Workiva-->
<!-- -->
<link:linkbase xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <link:roleRef roleURI="http://www.mrcy.com/role/Acquisitions" xlink:href="mrcy-20180331.xsd#Acquisitions" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/AcquisitionsNarrativeDetails" xlink:href="mrcy-20180331.xsd#AcquisitionsNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/AcquisitionsNetPurchasePriceAndFairValuesOfAssetsAndLiabilitiesAcquiredDetails" xlink:href="mrcy-20180331.xsd#AcquisitionsNetPurchasePriceAndFairValuesOfAssetsAndLiabilitiesAcquiredDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/AcquisitionsProFormaDetails" xlink:href="mrcy-20180331.xsd#AcquisitionsProFormaDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/AcquisitionsTables" xlink:href="mrcy-20180331.xsd#AcquisitionsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/ChangesInCarryingAmountOfGoodwillDetail" xlink:href="mrcy-20180331.xsd#ChangesInCarryingAmountOfGoodwillDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/CommitmentsAndContingencies" xlink:href="mrcy-20180331.xsd#CommitmentsAndContingencies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/CommitmentsAndContingenciesAdditionalInformationDetail" xlink:href="mrcy-20180331.xsd#CommitmentsAndContingenciesAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/ConsolidatedBalanceSheets" xlink:href="mrcy-20180331.xsd#ConsolidatedBalanceSheets" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:href="mrcy-20180331.xsd#ConsolidatedBalanceSheetsParenthetical" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/ConsolidatedStatementsOfCashFlows" xlink:href="mrcy-20180331.xsd#ConsolidatedStatementsOfCashFlows" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/ConsolidatedStatementsOfOperationsAndComprehensiveIncome" xlink:href="mrcy-20180331.xsd#ConsolidatedStatementsOfOperationsAndComprehensiveIncome" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/Debt" xlink:href="mrcy-20180331.xsd#Debt" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/DebtAdditionalInformationDetail" xlink:href="mrcy-20180331.xsd#DebtAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/DescriptionOfBusiness" xlink:href="mrcy-20180331.xsd#DescriptionOfBusiness" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/DescriptionOfBusinessDetails" xlink:href="mrcy-20180331.xsd#DescriptionOfBusinessDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/DocumentAndEntityInformation" xlink:href="mrcy-20180331.xsd#DocumentAndEntityInformation" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/EmployeeBenefitPlanDetails" xlink:href="mrcy-20180331.xsd#EmployeeBenefitPlanDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/EmployeeBenefitPlanEmployeeBenefitPlan" xlink:href="mrcy-20180331.xsd#EmployeeBenefitPlanEmployeeBenefitPlan" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/FairValueOfFinancialInstruments" xlink:href="mrcy-20180331.xsd#FairValueOfFinancialInstruments" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/FairValueOfFinancialInstrumentsSummaryOfFinancialAssetsMeasuredAtFairValueOnRecurringBasisDetail" xlink:href="mrcy-20180331.xsd#FairValueOfFinancialInstrumentsSummaryOfFinancialAssetsMeasuredAtFairValueOnRecurringBasisDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/FairValueOfFinancialInstrumentsTables" xlink:href="mrcy-20180331.xsd#FairValueOfFinancialInstrumentsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/Goodwill" xlink:href="mrcy-20180331.xsd#Goodwill" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/GoodwillTables" xlink:href="mrcy-20180331.xsd#GoodwillTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/IncomeTaxes" xlink:href="mrcy-20180331.xsd#IncomeTaxes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/IncomeTaxesAdditionalInformationDetail" xlink:href="mrcy-20180331.xsd#IncomeTaxesAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/Inventory" xlink:href="mrcy-20180331.xsd#Inventory" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/InventoryAdditionalInformationDetail" xlink:href="mrcy-20180331.xsd#InventoryAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/InventoryDetail" xlink:href="mrcy-20180331.xsd#InventoryDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/InventoryTables" xlink:href="mrcy-20180331.xsd#InventoryTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/OperatingSegmentGeographicInformationAndSignificantCustomers" xlink:href="mrcy-20180331.xsd#OperatingSegmentGeographicInformationAndSignificantCustomers" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/OperatingSegmentGeographicInformationAndSignificantCustomersCustomersComprisingTenPercentOrMoreRevenuesDetail" xlink:href="mrcy-20180331.xsd#OperatingSegmentGeographicInformationAndSignificantCustomersCustomersComprisingTenPercentOrMoreRevenuesDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/OperatingSegmentGeographicInformationAndSignificantCustomersGeographicDistributionOfRevenuesAndLongLivedAssetsFromContinuingOperationsDetail" xlink:href="mrcy-20180331.xsd#OperatingSegmentGeographicInformationAndSignificantCustomersGeographicDistributionOfRevenuesAndLongLivedAssetsFromContinuingOperationsDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/OperatingSegmentGeographicInformationAndSignificantCustomersProgramsComprisingTenPercentOrMoreOfCompanysRevenueDetail" xlink:href="mrcy-20180331.xsd#OperatingSegmentGeographicInformationAndSignificantCustomersProgramsComprisingTenPercentOrMoreOfCompanysRevenueDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/OperatingSegmentGeographicInformationAndSignificantCustomersTables" xlink:href="mrcy-20180331.xsd#OperatingSegmentGeographicInformationAndSignificantCustomersTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/Restructuring" xlink:href="mrcy-20180331.xsd#Restructuring" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/RestructuringAdditionalInformationDetail" xlink:href="mrcy-20180331.xsd#RestructuringAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/RestructuringExpensesByReportableSegmentForRestructuringPlansDetail" xlink:href="mrcy-20180331.xsd#RestructuringExpensesByReportableSegmentForRestructuringPlansDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/RestructuringTables" xlink:href="mrcy-20180331.xsd#RestructuringTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/StockBasedCompensation" xlink:href="mrcy-20180331.xsd#StockBasedCompensation" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/StockBasedCompensationAdditionalInformationDetail" xlink:href="mrcy-20180331.xsd#StockBasedCompensationAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/StockBasedCompensationStockBasedCompensationExpensesDetail" xlink:href="mrcy-20180331.xsd#StockBasedCompensationStockBasedCompensationExpensesDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/StockBasedCompensationSummaryOfNonvestedRestrictedStockDetail" xlink:href="mrcy-20180331.xsd#StockBasedCompensationSummaryOfNonvestedRestrictedStockDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/StockBasedCompensationSummaryOfStockOptionPlansDetail" xlink:href="mrcy-20180331.xsd#StockBasedCompensationSummaryOfStockOptionPlansDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/StockBasedCompensationTables" xlink:href="mrcy-20180331.xsd#StockBasedCompensationTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/SubsequentEvents" xlink:href="mrcy-20180331.xsd#SubsequentEvents" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/SummaryOfSignificantAccountingPolicies" xlink:href="mrcy-20180331.xsd#SummaryOfSignificantAccountingPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/SummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" xlink:href="mrcy-20180331.xsd#SummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/SummaryOfSignificantAccountingPoliciesBasicAndDilutedWeightedAverageSharesOutstandingDetail" xlink:href="mrcy-20180331.xsd#SummaryOfSignificantAccountingPoliciesBasicAndDilutedWeightedAverageSharesOutstandingDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/SummaryOfSignificantAccountingPoliciesPolicies" xlink:href="mrcy-20180331.xsd#SummaryOfSignificantAccountingPoliciesPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.mrcy.com/role/SummaryOfSignificantAccountingPoliciesTables" xlink:href="mrcy-20180331.xsd#SummaryOfSignificantAccountingPoliciesTables" xlink:type="simple" />
  <link: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" />
  <link: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" />
  <link: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" />
  <link: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" />
  <link: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" />
  <link: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" />
  <link: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" />
  <link:presentationLink xlink:role="http://www.mrcy.com/role/Acquisitions" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationsAbstract" xlink:label="loc_us-gaap_BusinessCombinationsAbstract_A5777E8744052FE503877C3AF6618BBB" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationDisclosureTextBlock" xlink:label="loc_us-gaap_BusinessCombinationDisclosureTextBlock_7FEF32AC2CE5857DB3D57C3AF6614AC3" xlink:type="locator" />
    <link: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_A5777E8744052FE503877C3AF6618BBB" xlink:to="loc_us-gaap_BusinessCombinationDisclosureTextBlock_7FEF32AC2CE5857DB3D57C3AF6614AC3" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/AcquisitionsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationsAbstract" xlink:label="loc_us-gaap_BusinessCombinationsAbstract_82B040780B77296285731933ED373CB4" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_BF3D1BFA89998DC5A7511933ED378535" xlink:type="locator" />
    <link: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_82B040780B77296285731933ED373CB4" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_BF3D1BFA89998DC5A7511933ED378535" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_6EBD60A9949E615AEC2B1933ED38D6DA" xlink:type="locator" />
    <link: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_BF3D1BFA89998DC5A7511933ED378535" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_6EBD60A9949E615AEC2B1933ED38D6DA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_5EDB6A774F52374C1F9A1933ED388008" xlink:type="locator" />
    <link: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_6EBD60A9949E615AEC2B1933ED38D6DA" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_5EDB6A774F52374C1F9A1933ED388008" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_ThemisComputerAcquisitionMember" xlink:label="loc_mrcy_ThemisComputerAcquisitionMember_D89D934A1DAFA54EABDF1933ED3863B0" xlink:type="locator" />
    <link: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_5EDB6A774F52374C1F9A1933ED388008" xlink:to="loc_mrcy_ThemisComputerAcquisitionMember_D89D934A1DAFA54EABDF1933ED3863B0" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_RichlandTechnologiesLLCMember" xlink:label="loc_mrcy_RichlandTechnologiesLLCMember_A8D4E33500CEE3842AC81933ED3817E7" xlink:type="locator" />
    <link: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_BusinessAcquisitionAcquireeDomain_5EDB6A774F52374C1F9A1933ED388008" xlink:to="loc_mrcy_RichlandTechnologiesLLCMember_A8D4E33500CEE3842AC81933ED3817E7" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_DeltaMicrowaveLLCMember" xlink:label="loc_mrcy_DeltaMicrowaveLLCMember_B4C9A0606D13CA2C53861933ED38747F" xlink:type="locator" />
    <link: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_BusinessAcquisitionAcquireeDomain_5EDB6A774F52374C1F9A1933ED388008" xlink:to="loc_mrcy_DeltaMicrowaveLLCMember_B4C9A0606D13CA2C53861933ED38747F" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_CESCreativeElectronicSystemsS.A.Member" xlink:label="loc_mrcy_CESCreativeElectronicSystemsS.A.Member_0B2CA47A6E40814742551933ED38E93B" xlink:type="locator" />
    <link: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_BusinessAcquisitionAcquireeDomain_5EDB6A774F52374C1F9A1933ED388008" xlink:to="loc_mrcy_CESCreativeElectronicSystemsS.A.Member_0B2CA47A6E40814742551933ED38E93B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_491A52793C47306A8EA11933ED3892C1" xlink:type="locator" />
    <link: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_BF3D1BFA89998DC5A7511933ED378535" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_491A52793C47306A8EA11933ED3892C1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_A8FEDAA29B343AEF6F1D1933ED387558" xlink:type="locator" />
    <link: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_491A52793C47306A8EA11933ED3892C1" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_A8FEDAA29B343AEF6F1D1933ED387558" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CustomerRelationshipsMember" xlink:label="loc_us-gaap_CustomerRelationshipsMember_0C7FF088751F85C120F01933ED381EE3" xlink:type="locator" />
    <link: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_A8FEDAA29B343AEF6F1D1933ED387558" xlink:to="loc_us-gaap_CustomerRelationshipsMember_0C7FF088751F85C120F01933ED381EE3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DevelopedTechnologyRightsMember" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_969FCECFDF27859C0B091933ED3890C8" xlink:type="locator" />
    <link: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_A8FEDAA29B343AEF6F1D1933ED387558" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_969FCECFDF27859C0B091933ED3890C8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OrderOrProductionBacklogMember" xlink:label="loc_us-gaap_OrderOrProductionBacklogMember_DE82E2587672D6ADF34E1933ED38E2D9" xlink:type="locator" />
    <link: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_A8FEDAA29B343AEF6F1D1933ED387558" xlink:to="loc_us-gaap_OrderOrProductionBacklogMember_DE82E2587672D6ADF34E1933ED38E2D9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_9CFAD2A70F12F9B2D4621933ED386D4F" xlink:type="locator" />
    <link: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_BF3D1BFA89998DC5A7511933ED378535" xlink:to="loc_us-gaap_BusinessAcquisitionLineItems_9CFAD2A70F12F9B2D4621933ED386D4F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_CC20BB0D3F72C182A6D51933ED38E77C" xlink:type="locator" />
    <link: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_9CFAD2A70F12F9B2D4621933ED386D4F" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_CC20BB0D3F72C182A6D51933ED38E77C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferred1" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_6AAA03FF53D3159869A51933ED382218" xlink:type="locator" />
    <link: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_BusinessAcquisitionLineItems_9CFAD2A70F12F9B2D4621933ED386D4F" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_6AAA03FF53D3159869A51933ED382218" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FinitelivedIntangibleAssetsAcquired1" xlink:label="loc_us-gaap_FinitelivedIntangibleAssetsAcquired1_F90120154FA6521CF9361933ED39C196" xlink:type="locator" />
    <link: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_9CFAD2A70F12F9B2D4621933ED386D4F" xlink:to="loc_us-gaap_FinitelivedIntangibleAssetsAcquired1_F90120154FA6521CF9361933ED39C196" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife" xlink:label="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_DFEA102F9C0FC15AD7D31933ED397AE4" xlink:type="locator" />
    <link: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_9CFAD2A70F12F9B2D4621933ED386D4F" xlink:to="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_DFEA102F9C0FC15AD7D31933ED397AE4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_765239FF7DA64844A0261933ED3936A9" xlink:type="locator" />
    <link: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_9CFAD2A70F12F9B2D4621933ED386D4F" xlink:to="loc_us-gaap_Goodwill_765239FF7DA64844A0261933ED3936A9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount" xlink:label="loc_us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount_4E74E9D626CE436EA1441933ED39A7B0" xlink:type="locator" />
    <link: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_9CFAD2A70F12F9B2D4621933ED386D4F" xlink:to="loc_us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount_4E74E9D626CE436EA1441933ED39A7B0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual" xlink:label="loc_us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual_26ED4686207125F860F81933ED394DD4" xlink:type="locator" />
    <link: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_9CFAD2A70F12F9B2D4621933ED386D4F" xlink:to="loc_us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual_26ED4686207125F860F81933ED394DD4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual" xlink:label="loc_us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual_F0915F4DDACA724ECD001933ED39E9BF" xlink:type="locator" />
    <link: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_9CFAD2A70F12F9B2D4621933ED386D4F" xlink:to="loc_us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual_F0915F4DDACA724ECD001933ED39E9BF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesGross" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_864F4A8E1B4AFB832BC51933ED392582" xlink:type="locator" />
    <link: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_BusinessAcquisitionLineItems_9CFAD2A70F12F9B2D4621933ED386D4F" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_864F4A8E1B4AFB832BC51933ED392582" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/AcquisitionsNetPurchasePriceAndFairValuesOfAssetsAndLiabilitiesAcquiredDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationsAbstract" xlink:label="loc_us-gaap_BusinessCombinationsAbstract_A5F7B1B887B3F3A3FBD31933ED318373" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_C56DDD08D52444DF113D1933ED319259" xlink:type="locator" />
    <link: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_A5F7B1B887B3F3A3FBD31933ED318373" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_C56DDD08D52444DF113D1933ED319259" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_5E2B750A2D56DF5223A21933ED3156F6" xlink:type="locator" />
    <link: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_C56DDD08D52444DF113D1933ED319259" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_5E2B750A2D56DF5223A21933ED3156F6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_E57366E885465CECA1D41933ED31F8EB" xlink:type="locator" />
    <link: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_5E2B750A2D56DF5223A21933ED3156F6" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_E57366E885465CECA1D41933ED31F8EB" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_ThemisComputerAcquisitionMember" xlink:label="loc_mrcy_ThemisComputerAcquisitionMember_DBAE126EA82E0D594D751933ED310918" xlink:type="locator" />
    <link: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_E57366E885465CECA1D41933ED31F8EB" xlink:to="loc_mrcy_ThemisComputerAcquisitionMember_DBAE126EA82E0D594D751933ED310918" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_DeltaMicrowaveLLCMember" xlink:label="loc_mrcy_DeltaMicrowaveLLCMember_FB505462DA7A10B831511933ED310EA5" xlink:type="locator" />
    <link: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_BusinessAcquisitionAcquireeDomain_E57366E885465CECA1D41933ED31F8EB" xlink:to="loc_mrcy_DeltaMicrowaveLLCMember_FB505462DA7A10B831511933ED310EA5" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_CESCreativeElectronicSystemsS.A.Member" xlink:label="loc_mrcy_CESCreativeElectronicSystemsS.A.Member_A2477AD6BA98EECCA1501933ED314B7C" xlink:type="locator" />
    <link: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_BusinessAcquisitionAcquireeDomain_E57366E885465CECA1D41933ED31F8EB" xlink:to="loc_mrcy_CESCreativeElectronicSystemsS.A.Member_A2477AD6BA98EECCA1501933ED314B7C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_B8DCF5B70ACA03AF4A511933ED31D2FB" xlink:type="locator" />
    <link: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_C56DDD08D52444DF113D1933ED319259" xlink:to="loc_us-gaap_BusinessAcquisitionLineItems_B8DCF5B70ACA03AF4A511933ED31D2FB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferredAbstract" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferredAbstract_F806DE136F5F84C15B3F1933ED324D51" xlink:type="locator" />
    <link: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_B8DCF5B70ACA03AF4A511933ED31D2FB" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferredAbstract_F806DE136F5F84C15B3F1933ED324D51" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesGross" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_A604398FDFB7F503C6B71933ED32E149" xlink:type="locator" />
    <link: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_F806DE136F5F84C15B3F1933ED324D51" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_A604398FDFB7F503C6B71933ED32E149" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_BusinessCombinationsConsiderationReceivedWorkingCapitalAdjustment" xlink:label="loc_mrcy_BusinessCombinationsConsiderationReceivedWorkingCapitalAdjustment_0EADDA777E612475DD8C1933ED328EF2" xlink:type="locator" />
    <link: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_F806DE136F5F84C15B3F1933ED324D51" xlink:to="loc_mrcy_BusinessCombinationsConsiderationReceivedWorkingCapitalAdjustment_0EADDA777E612475DD8C1933ED328EF2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CashAcquiredFromAcquisition" xlink:label="loc_us-gaap_CashAcquiredFromAcquisition_6026D413993926093FDD1933ED32D817" xlink:type="locator" />
    <link: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_F806DE136F5F84C15B3F1933ED324D51" xlink:to="loc_us-gaap_CashAcquiredFromAcquisition_6026D413993926093FDD1933ED32D817" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_E196B60ACE73125A86261933ED32C2DC" xlink:type="locator" />
    <link: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_F806DE136F5F84C15B3F1933ED324D51" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_E196B60ACE73125A86261933ED32C2DC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_2320E502613BFE0E30861933ED323AA8" xlink:type="locator" />
    <link: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_B8DCF5B70ACA03AF4A511933ED31D2FB" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_2320E502613BFE0E30861933ED323AA8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_17B0D6B7FBED0DF9A6B91933ED32105C" xlink:type="locator" />
    <link: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_2320E502613BFE0E30861933ED323AA8" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_17B0D6B7FBED0DF9A6B91933ED32105C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_ADD06D5720E0609037501933ED32F05D" xlink:type="locator" />
    <link: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_2320E502613BFE0E30861933ED323AA8" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_ADD06D5720E0609037501933ED32F05D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_BDA7726026C7287328141933ED32D907" xlink:type="locator" />
    <link: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_2320E502613BFE0E30861933ED323AA8" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_BDA7726026C7287328141933ED32D907" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_0837745016322D3DAE131933ED32B47D" xlink:type="locator" />
    <link: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_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_2320E502613BFE0E30861933ED323AA8" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_0837745016322D3DAE131933ED32B47D" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherAssetsCurrentAndNoncurrent" xlink:label="loc_mrcy_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherAssetsCurrentAndNoncurrent_801B41AAD874BAEEC89C1933ED320A2B" xlink:type="locator" />
    <link: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_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_2320E502613BFE0E30861933ED323AA8" xlink:to="loc_mrcy_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherAssetsCurrentAndNoncurrent_801B41AAD874BAEEC89C1933ED320A2B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable_6ADCB0027CC3EBED26C11933ED32C47D" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_2320E502613BFE0E30861933ED323AA8" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable_6ADCB0027CC3EBED26C11933ED32C47D" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAccruedLiabilities" xlink:label="loc_mrcy_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAccruedLiabilities_C9E9CE9B2C6E0C6FAAB41933ED3289C7" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_2320E502613BFE0E30861933ED323AA8" xlink:to="loc_mrcy_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAccruedLiabilities_C9E9CE9B2C6E0C6FAAB41933ED3289C7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther_B7A649F60F6517CD335B1933ED325CC5" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_2320E502613BFE0E30861933ED323AA8" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther_B7A649F60F6517CD335B1933ED325CC5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities_49D709A5820F29271EC41933ED33C0AA" xlink:type="locator" />
    <link:presentationArc order="9" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_2320E502613BFE0E30861933ED323AA8" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities_49D709A5820F29271EC41933ED33C0AA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities_AD609B18EA35D9A3B54C1933ED3394F7" xlink:type="locator" />
    <link:presentationArc order="10" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_2320E502613BFE0E30861933ED323AA8" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities_AD609B18EA35D9A3B54C1933ED3394F7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesNoncurrent" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesNoncurrent_F63705A74214F35260AF1933ED336755" xlink:type="locator" />
    <link:presentationArc order="11" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_2320E502613BFE0E30861933ED323AA8" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesNoncurrent_F63705A74214F35260AF1933ED336755" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTangibleAssets" xlink:label="loc_mrcy_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTangibleAssets_77BFF27D9601CE2407761933ED33FE6B" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_B8DCF5B70ACA03AF4A511933ED31D2FB" xlink:to="loc_mrcy_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTangibleAssets_77BFF27D9601CE2407761933ED33FE6B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_A8E09D942C5CBA1425521933ED332EEA" xlink:type="locator" />
    <link: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_B8DCF5B70ACA03AF4A511933ED31D2FB" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_A8E09D942C5CBA1425521933ED332EEA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_18642103BBD00588490C1933ED332424" xlink:type="locator" />
    <link: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_B8DCF5B70ACA03AF4A511933ED31D2FB" xlink:to="loc_us-gaap_Goodwill_18642103BBD00588490C1933ED332424" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_474893ACFE6D1B8131DC1933ED33BF6A" xlink:type="locator" />
    <link: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_BusinessAcquisitionLineItems_B8DCF5B70ACA03AF4A511933ED31D2FB" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_474893ACFE6D1B8131DC1933ED33BF6A" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/AcquisitionsProFormaDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationsAbstract" xlink:label="loc_us-gaap_BusinessCombinationsAbstract_CFD69B0235455333EF1608DF5FD41109" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_4C56377818C23AF06F4008DF63EC919F" xlink:type="locator" />
    <link: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_CFD69B0235455333EF1608DF5FD41109" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_4C56377818C23AF06F4008DF63EC919F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_0F2F8F17DCF097D5E46908DF63EC9FC4" xlink:type="locator" />
    <link: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_4C56377818C23AF06F4008DF63EC919F" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_0F2F8F17DCF097D5E46908DF63EC9FC4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_64A7B20C6D061206CD1708DF63ED9C81" xlink:type="locator" />
    <link: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_0F2F8F17DCF097D5E46908DF63EC9FC4" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_64A7B20C6D061206CD1708DF63ED9C81" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_ThemisComputerAcquisitionMember" xlink:label="loc_mrcy_ThemisComputerAcquisitionMember_9B188DA229CE40EEABE608E20E048B61" xlink:type="locator" />
    <link: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_64A7B20C6D061206CD1708DF63ED9C81" xlink:to="loc_mrcy_ThemisComputerAcquisitionMember_9B188DA229CE40EEABE608E20E048B61" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_ABB9E9BF1AC5B20FAA2108DF63F34EEC" xlink:type="locator" />
    <link: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_4C56377818C23AF06F4008DF63EC919F" xlink:to="loc_us-gaap_BusinessAcquisitionLineItems_ABB9E9BF1AC5B20FAA2108DF63F34EEC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionsProFormaRevenue" xlink:label="loc_us-gaap_BusinessAcquisitionsProFormaRevenue_FC6F0499D67E6DD47E7008DFFF30C6BB" xlink:type="locator" />
    <link: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_ABB9E9BF1AC5B20FAA2108DF63F34EEC" xlink:to="loc_us-gaap_BusinessAcquisitionsProFormaRevenue_FC6F0499D67E6DD47E7008DFFF30C6BB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss" xlink:label="loc_us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_725D7F1F6E1EE7AAFAA008E0698CE34F" xlink:type="locator" />
    <link: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_ABB9E9BF1AC5B20FAA2108DF63F34EEC" xlink:to="loc_us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_725D7F1F6E1EE7AAFAA008E0698CE34F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic" xlink:label="loc_us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic_B849A8542F9154EDAFAF08E0E9ED25C2" xlink:type="locator" />
    <link: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_ABB9E9BF1AC5B20FAA2108DF63F34EEC" xlink:to="loc_us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic_B849A8542F9154EDAFAF08E0E9ED25C2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted" xlink:label="loc_us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted_EE791ED8342E1BE52CA708E1524FC83C" xlink:type="locator" />
    <link: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_ABB9E9BF1AC5B20FAA2108DF63F34EEC" xlink:to="loc_us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted_EE791ED8342E1BE52CA708E1524FC83C" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/AcquisitionsTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationsAbstract" xlink:label="loc_us-gaap_BusinessCombinationsAbstract_687793A2BA54A978245908B8D8634D57" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTextBlock" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTextBlock_DBAB01CDF4907EAD84A708B8D865DE60" xlink:type="locator" />
    <link: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_687793A2BA54A978245908B8D8634D57" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTextBlock_DBAB01CDF4907EAD84A708B8D865DE60" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionProFormaInformationTextBlock" xlink:label="loc_us-gaap_BusinessAcquisitionProFormaInformationTextBlock_C6E7A73DAF63C763959608BD2C6457AA" xlink:type="locator" />
    <link: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_BusinessCombinationsAbstract_687793A2BA54A978245908B8D8634D57" xlink:to="loc_us-gaap_BusinessAcquisitionProFormaInformationTextBlock_C6E7A73DAF63C763959608BD2C6457AA" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/ChangesInCarryingAmountOfGoodwillDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_2A47D7345BE0A463402C2724AA8F6AF5" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfGoodwillTable" xlink:label="loc_us-gaap_ScheduleOfGoodwillTable_2DFA43C8EB37E53435812724AA8F7F3C" xlink:type="locator" />
    <link: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_2A47D7345BE0A463402C2724AA8F6AF5" xlink:to="loc_us-gaap_ScheduleOfGoodwillTable_2DFA43C8EB37E53435812724AA8F7F3C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_2DDDFA72C8B994DD392D2724AA8F269A" xlink:type="locator" />
    <link: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_ScheduleOfGoodwillTable_2DFA43C8EB37E53435812724AA8F7F3C" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_2DDDFA72C8B994DD392D2724AA8F269A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_04DE657B3FAEEA1557212724AA8F0E5B" xlink:type="locator" />
    <link: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_2DDDFA72C8B994DD392D2724AA8F269A" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_04DE657B3FAEEA1557212724AA8F0E5B" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_CESCreativeElectronicSystemsS.A.Member" xlink:label="loc_mrcy_CESCreativeElectronicSystemsS.A.Member_85C940339F6EF5D17ECA2724AA8F902F" xlink:type="locator" />
    <link: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_04DE657B3FAEEA1557212724AA8F0E5B" xlink:to="loc_mrcy_CESCreativeElectronicSystemsS.A.Member_85C940339F6EF5D17ECA2724AA8F902F" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_DeltaMicrowaveLLCMember" xlink:label="loc_mrcy_DeltaMicrowaveLLCMember_DC7FD7C4F556492524DF2724AA8F313B" xlink:type="locator" />
    <link: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_BusinessAcquisitionAcquireeDomain_04DE657B3FAEEA1557212724AA8F0E5B" xlink:to="loc_mrcy_DeltaMicrowaveLLCMember_DC7FD7C4F556492524DF2724AA8F313B" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_RichlandTechnologiesLLCMember" xlink:label="loc_mrcy_RichlandTechnologiesLLCMember_E66ED9AD5F17046C1F582724AA9E80B3" xlink:type="locator" />
    <link: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_BusinessAcquisitionAcquireeDomain_04DE657B3FAEEA1557212724AA8F0E5B" xlink:to="loc_mrcy_RichlandTechnologiesLLCMember_E66ED9AD5F17046C1F582724AA9E80B3" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_ThemisComputerAcquisitionMember" xlink:label="loc_mrcy_ThemisComputerAcquisitionMember_41B4AC01164E41F6CA6A2724AA9E6C97" xlink:type="locator" />
    <link: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_BusinessAcquisitionAcquireeDomain_04DE657B3FAEEA1557212724AA8F0E5B" xlink:to="loc_mrcy_ThemisComputerAcquisitionMember_41B4AC01164E41F6CA6A2724AA9E6C97" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_DF63DE84986F97D917112724AA9E93D7" xlink:type="locator" />
    <link: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_2DFA43C8EB37E53435812724AA8F7F3C" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_DF63DE84986F97D917112724AA9E93D7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_23D725BFF2A5FC2FB6C12724AA9EC6A9" xlink:type="locator" />
    <link: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_DF63DE84986F97D917112724AA9E93D7" xlink:to="loc_us-gaap_SegmentDomain_23D725BFF2A5FC2FB6C12724AA9EC6A9" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_SensorAndMissionProcessingMember" xlink:label="loc_mrcy_SensorAndMissionProcessingMember_F6782761A96FA3DE990F2724ADC29D63" xlink:type="locator" />
    <link: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_23D725BFF2A5FC2FB6C12724AA9EC6A9" xlink:to="loc_mrcy_SensorAndMissionProcessingMember_F6782761A96FA3DE990F2724ADC29D63" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_AdvancedMicroelectronicSolutionsMember" xlink:label="loc_mrcy_AdvancedMicroelectronicSolutionsMember_6F22D2F6E3E8E2A16A7E27256428840B" xlink:type="locator" />
    <link: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_23D725BFF2A5FC2FB6C12724AA9EC6A9" xlink:to="loc_mrcy_AdvancedMicroelectronicSolutionsMember_6F22D2F6E3E8E2A16A7E27256428840B" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_CarveOutBusinessMember" xlink:label="loc_mrcy_CarveOutBusinessMember_37B75155E6BA3A761EA52724AA9E38F3" xlink:type="locator" />
    <link: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_SegmentDomain_23D725BFF2A5FC2FB6C12724AA9EC6A9" xlink:to="loc_mrcy_CarveOutBusinessMember_37B75155E6BA3A761EA52724AA9E38F3" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_MercuryDefenseSystemsMember" xlink:label="loc_mrcy_MercuryDefenseSystemsMember_5E00B593FE9EFDEF3A262725E042C606" xlink:type="locator" />
    <link: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_SegmentDomain_23D725BFF2A5FC2FB6C12724AA9EC6A9" xlink:to="loc_mrcy_MercuryDefenseSystemsMember_5E00B593FE9EFDEF3A262725E042C606" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GoodwillLineItems" xlink:label="loc_us-gaap_GoodwillLineItems_40B3A5DF09EAE49F7D5B2724AA9E3D73" xlink:type="locator" />
    <link: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_ScheduleOfGoodwillTable_2DFA43C8EB37E53435812724AA8F7F3C" xlink:to="loc_us-gaap_GoodwillLineItems_40B3A5DF09EAE49F7D5B2724AA9E3D73" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GoodwillRollForward" xlink:label="loc_us-gaap_GoodwillRollForward_74C854DCB9AFA50BBCCB2724AA9EE566" xlink:type="locator" />
    <link: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_40B3A5DF09EAE49F7D5B2724AA9E3D73" xlink:to="loc_us-gaap_GoodwillRollForward_74C854DCB9AFA50BBCCB2724AA9EE566" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_133F9B3807989A5521822724AA9E51FA" xlink:type="locator" />
    <link: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_74C854DCB9AFA50BBCCB2724AA9EE566" xlink:to="loc_us-gaap_Goodwill_133F9B3807989A5521822724AA9E51FA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GoodwillAcquiredDuringPeriod" xlink:label="loc_us-gaap_GoodwillAcquiredDuringPeriod_B0BF045E3CB7514B92A42724AA9E84A6" xlink:type="locator" />
    <link: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_74C854DCB9AFA50BBCCB2724AA9EE566" xlink:to="loc_us-gaap_GoodwillAcquiredDuringPeriod_B0BF045E3CB7514B92A42724AA9E84A6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_FBC00FF14E3FFB93D5A22724AA9E8DCB" xlink:type="locator" />
    <link: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_74C854DCB9AFA50BBCCB2724AA9EE566" xlink:to="loc_us-gaap_Goodwill_FBC00FF14E3FFB93D5A22724AA9E8DCB" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/CommitmentsAndContingencies" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:label="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_430EC1837BA21E5ADC6D7C3AF689172D" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureTextBlock" xlink:label="loc_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_CD7FF35DACEA0D11BC527C3AF6891542" xlink:type="locator" />
    <link: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_430EC1837BA21E5ADC6D7C3AF689172D" xlink:to="loc_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_CD7FF35DACEA0D11BC527C3AF6891542" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/CommitmentsAndContingenciesAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:label="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_2DF2D771F531622006D77C3AF64D4C05" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongTermPurchaseCommitmentTable" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentTable_564BB55D7725928C3FE17C3AF64DC97F" xlink:type="locator" />
    <link: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_2DF2D771F531622006D77C3AF64D4C05" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentTable_564BB55D7725928C3FE17C3AF64DC97F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_57F57AA15AF2AAB998F97C3AF64DFAE5" xlink:type="locator" />
    <link: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_LongTermPurchaseCommitmentTable_564BB55D7725928C3FE17C3AF64DC97F" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_57F57AA15AF2AAB998F97C3AF64DFAE5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_409ACF0A8E97B67C08507C3AF64D5400" xlink:type="locator" />
    <link: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_57F57AA15AF2AAB998F97C3AF64DFAE5" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_409ACF0A8E97B67C08507C3AF64D5400" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_NonCancelablePurchaseCommitmentsMember" xlink:label="loc_mrcy_NonCancelablePurchaseCommitmentsMember_3DFB44CA5526553911007C3AF64D0B75" xlink:type="locator" />
    <link: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_409ACF0A8E97B67C08507C3AF64D5400" xlink:to="loc_mrcy_NonCancelablePurchaseCommitmentsMember_3DFB44CA5526553911007C3AF64D0B75" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongTermPurchaseCommitmentLineItems" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentLineItems_176E4101E13305B9654E7C3AF64DDACD" xlink:type="locator" />
    <link: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_LongTermPurchaseCommitmentTable_564BB55D7725928C3FE17C3AF64DC97F" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentLineItems_176E4101E13305B9654E7C3AF64DDACD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted" xlink:label="loc_us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted_414FCB2BE8813324A8467C3AF64D7792" xlink:type="locator" />
    <link: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_LongTermPurchaseCommitmentLineItems_176E4101E13305B9654E7C3AF64DDACD" xlink:to="loc_us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted_414FCB2BE8813324A8467C3AF64D7792" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/ConsolidatedBalanceSheets" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="loc_us-gaap_StatementOfFinancialPositionAbstract_AB6D83B8DDBC3DB726A01933ED65C171" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="loc_us-gaap_AssetsAbstract_ED4FA481248838B19AE71933ED65C516" xlink:type="locator" />
    <link: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_AB6D83B8DDBC3DB726A01933ED65C171" xlink:to="loc_us-gaap_AssetsAbstract_ED4FA481248838B19AE71933ED65C516" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="loc_us-gaap_AssetsCurrentAbstract_53DD48654AAF94D202CA1933ED65C9F0" xlink:type="locator" />
    <link: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_ED4FA481248838B19AE71933ED65C516" xlink:to="loc_us-gaap_AssetsCurrentAbstract_53DD48654AAF94D202CA1933ED65C9F0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_8E34E2BDED202F37D80D1933ED6534E0" xlink:type="locator" />
    <link: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_53DD48654AAF94D202CA1933ED65C9F0" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_8E34E2BDED202F37D80D1933ED6534E0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_04260DE0BD1BE91154A51933ED652165" xlink:type="locator" />
    <link: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_53DD48654AAF94D202CA1933ED65C9F0" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_04260DE0BD1BE91154A51933ED652165" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CostsInExcessOfBillingsOnUncompletedContractsOrProgramsExpectedToBeCollectedWithinOneYear" xlink:label="loc_us-gaap_CostsInExcessOfBillingsOnUncompletedContractsOrProgramsExpectedToBeCollectedWithinOneYear_23F5F6FE3A37C25143EF1933ED651F7D" xlink:type="locator" />
    <link: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_53DD48654AAF94D202CA1933ED65C9F0" xlink:to="loc_us-gaap_CostsInExcessOfBillingsOnUncompletedContractsOrProgramsExpectedToBeCollectedWithinOneYear_23F5F6FE3A37C25143EF1933ED651F7D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InventoryNet" xlink:label="loc_us-gaap_InventoryNet_2218DE359A7E598E11871933ED66967B" xlink:type="locator" />
    <link: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_53DD48654AAF94D202CA1933ED65C9F0" xlink:to="loc_us-gaap_InventoryNet_2218DE359A7E598E11871933ED66967B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PrepaidTaxes" xlink:label="loc_us-gaap_PrepaidTaxes_01C827B12D605531B9AB1933ED660F6C" xlink:type="locator" />
    <link: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_53DD48654AAF94D202CA1933ED65C9F0" xlink:to="loc_us-gaap_PrepaidTaxes_01C827B12D605531B9AB1933ED660F6C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_FB67F2CAD70F880B7A7E1933ED666BBA" xlink:type="locator" />
    <link: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_53DD48654AAF94D202CA1933ED65C9F0" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_FB67F2CAD70F880B7A7E1933ED666BBA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="loc_us-gaap_AssetsCurrent_CEDADAC6D9272B67CFB11933ED663A41" xlink:type="locator" />
    <link: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_AssetsCurrentAbstract_53DD48654AAF94D202CA1933ED65C9F0" xlink:to="loc_us-gaap_AssetsCurrent_CEDADAC6D9272B67CFB11933ED663A41" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_914799B77CC06D4097A91933ED66BD08" xlink:type="locator" />
    <link: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_ED4FA481248838B19AE71933ED65C516" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_914799B77CC06D4097A91933ED66BD08" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_5547EAB79F5A7FBCEB361933ED664681" xlink:type="locator" />
    <link: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_ED4FA481248838B19AE71933ED65C516" xlink:to="loc_us-gaap_Goodwill_5547EAB79F5A7FBCEB361933ED664681" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_1F37132BCD937F148F531933ED665594" xlink:type="locator" />
    <link: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_ED4FA481248838B19AE71933ED65C516" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_1F37132BCD937F148F531933ED665594" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_38D551746447DAEC7D551933ED66AD52" xlink:type="locator" />
    <link: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_ED4FA481248838B19AE71933ED65C516" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_38D551746447DAEC7D551933ED66AD52" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_CA4C31105C23F606A9CA1933ED662C73" xlink:type="locator" />
    <link: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_AssetsAbstract_ED4FA481248838B19AE71933ED65C516" xlink:to="loc_us-gaap_Assets_CA4C31105C23F606A9CA1933ED662C73" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_CB7995108EC31266C70E1933ED66285B" xlink:type="locator" />
    <link: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_AB6D83B8DDBC3DB726A01933ED65C171" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_CB7995108EC31266C70E1933ED66285B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract_BF91168C79910C6114EB1933ED66D114" xlink:type="locator" />
    <link: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_CB7995108EC31266C70E1933ED66285B" xlink:to="loc_us-gaap_LiabilitiesCurrentAbstract_BF91168C79910C6114EB1933ED66D114" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccountsPayableCurrent" xlink:label="loc_us-gaap_AccountsPayableCurrent_ADCDFA1D75093E33F8231933ED66B2DC" xlink:type="locator" />
    <link: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_BF91168C79910C6114EB1933ED66D114" xlink:to="loc_us-gaap_AccountsPayableCurrent_ADCDFA1D75093E33F8231933ED66B2DC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_0D5FD33354DAF9B9CD561933ED663D3A" xlink:type="locator" />
    <link: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_BF91168C79910C6114EB1933ED66D114" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_0D5FD33354DAF9B9CD561933ED663D3A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_5D5B6D6FBA11E45C57A11933ED66A813" xlink:type="locator" />
    <link: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_BF91168C79910C6114EB1933ED66D114" xlink:to="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_5D5B6D6FBA11E45C57A11933ED66A813" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredRevenueCurrent" xlink:label="loc_us-gaap_DeferredRevenueCurrent_B4B632B282A66EC145F11933ED66BD7C" xlink:type="locator" />
    <link: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_BF91168C79910C6114EB1933ED66D114" xlink:to="loc_us-gaap_DeferredRevenueCurrent_B4B632B282A66EC145F11933ED66BD7C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="loc_us-gaap_LiabilitiesCurrent_11BE4750B50B1A27CA011933ED66FEDA" xlink:type="locator" />
    <link: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_BF91168C79910C6114EB1933ED66D114" xlink:to="loc_us-gaap_LiabilitiesCurrent_11BE4750B50B1A27CA011933ED66FEDA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxLiabilitiesNoncurrent" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesNoncurrent_F813EF4DBC961A615A6C1933ED662F3B" xlink:type="locator" />
    <link: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_CB7995108EC31266C70E1933ED66285B" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesNoncurrent_F813EF4DBC961A615A6C1933ED662F3B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccruedIncomeTaxesNoncurrent" xlink:label="loc_us-gaap_AccruedIncomeTaxesNoncurrent_09DDA7236C1E71B80AE21933ED67E7E0" xlink:type="locator" />
    <link: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_CB7995108EC31266C70E1933ED66285B" xlink:to="loc_us-gaap_AccruedIncomeTaxesNoncurrent_09DDA7236C1E71B80AE21933ED67E7E0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SecuredLongTermDebt" xlink:label="loc_us-gaap_SecuredLongTermDebt_B18BB78071983250D4E31933ED675087" xlink:type="locator" />
    <link: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_LiabilitiesAndStockholdersEquityAbstract_CB7995108EC31266C70E1933ED66285B" xlink:to="loc_us-gaap_SecuredLongTermDebt_B18BB78071983250D4E31933ED675087" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_1F243CEBF7DC6345792E1933ED67A29C" xlink:type="locator" />
    <link: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_CB7995108EC31266C70E1933ED66285B" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_1F243CEBF7DC6345792E1933ED67A29C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Liabilities" xlink:label="loc_us-gaap_Liabilities_CCC67C98BC768CCDF05C1933ED67F324" xlink:type="locator" />
    <link: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_CB7995108EC31266C70E1933ED66285B" xlink:to="loc_us-gaap_Liabilities_CCC67C98BC768CCDF05C1933ED67F324" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="loc_us-gaap_CommitmentsAndContingencies_641E891BB2BC64E039331933ED67D289" xlink:type="locator" />
    <link: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_CB7995108EC31266C70E1933ED66285B" xlink:to="loc_us-gaap_CommitmentsAndContingencies_641E891BB2BC64E039331933ED67D289" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="loc_us-gaap_StockholdersEquityAbstract_FE78593FD38CA16B8FFF1933ED67F84C" xlink:type="locator" />
    <link: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_CB7995108EC31266C70E1933ED66285B" xlink:to="loc_us-gaap_StockholdersEquityAbstract_FE78593FD38CA16B8FFF1933ED67F84C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PreferredStockValue" xlink:label="loc_us-gaap_PreferredStockValue_9421F531E88FC74888C81933ED6724D5" xlink:type="locator" />
    <link: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_FE78593FD38CA16B8FFF1933ED67F84C" xlink:to="loc_us-gaap_PreferredStockValue_9421F531E88FC74888C81933ED6724D5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommonStockValue" xlink:label="loc_us-gaap_CommonStockValue_F30286B94457BA33EE031933ED67D954" xlink:type="locator" />
    <link: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_FE78593FD38CA16B8FFF1933ED67F84C" xlink:to="loc_us-gaap_CommonStockValue_F30286B94457BA33EE031933ED67D954" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AdditionalPaidInCapital" xlink:label="loc_us-gaap_AdditionalPaidInCapital_743796DCFD7DF79283A11933ED671469" xlink:type="locator" />
    <link: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_FE78593FD38CA16B8FFF1933ED67F84C" xlink:to="loc_us-gaap_AdditionalPaidInCapital_743796DCFD7DF79283A11933ED671469" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_5B0CB748A132660538691933ED6726A0" xlink:type="locator" />
    <link: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_FE78593FD38CA16B8FFF1933ED67F84C" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_5B0CB748A132660538691933ED6726A0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_E824B5A57812E5505BD41933ED672625" xlink:type="locator" />
    <link: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_FE78593FD38CA16B8FFF1933ED67F84C" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_E824B5A57812E5505BD41933ED672625" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_3E2FB820B2B5E964D11B1933ED67BF6F" xlink:type="locator" />
    <link: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_FE78593FD38CA16B8FFF1933ED67F84C" xlink:to="loc_us-gaap_StockholdersEquity_3E2FB820B2B5E964D11B1933ED67BF6F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_EA338B4479A1624988F31933ED673E3E" xlink:type="locator" />
    <link: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_CB7995108EC31266C70E1933ED66285B" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquity_EA338B4479A1624988F31933ED673E3E" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="loc_us-gaap_StatementOfFinancialPositionAbstract_76AAB69C5F9F316F69FE7C3AF66B54B8" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_E024F03CC0E1E756AAAD7C3AF66B2BA4" xlink:type="locator" />
    <link: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_76AAB69C5F9F316F69FE7C3AF66B54B8" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_E024F03CC0E1E756AAAD7C3AF66B2BA4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PreferredStockParOrStatedValuePerShare" xlink:label="loc_us-gaap_PreferredStockParOrStatedValuePerShare_FF2C39047CB6DBA7EE1D7C3AF66B5E79" xlink:type="locator" />
    <link: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_76AAB69C5F9F316F69FE7C3AF66B54B8" xlink:to="loc_us-gaap_PreferredStockParOrStatedValuePerShare_FF2C39047CB6DBA7EE1D7C3AF66B5E79" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PreferredStockSharesAuthorized" xlink:label="loc_us-gaap_PreferredStockSharesAuthorized_D31C5B7A281A4DD468DA7C3AF66B2B1B" xlink:type="locator" />
    <link: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_76AAB69C5F9F316F69FE7C3AF66B54B8" xlink:to="loc_us-gaap_PreferredStockSharesAuthorized_D31C5B7A281A4DD468DA7C3AF66B2B1B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PreferredStockSharesIssued" xlink:label="loc_us-gaap_PreferredStockSharesIssued_7418CF2785E23EB2E72F7C3AF66B585A" xlink:type="locator" />
    <link: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_76AAB69C5F9F316F69FE7C3AF66B54B8" xlink:to="loc_us-gaap_PreferredStockSharesIssued_7418CF2785E23EB2E72F7C3AF66B585A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PreferredStockSharesOutstanding" xlink:label="loc_us-gaap_PreferredStockSharesOutstanding_B9C6671C786E870402DD7C3AF66B8CD1" xlink:type="locator" />
    <link: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_76AAB69C5F9F316F69FE7C3AF66B54B8" xlink:to="loc_us-gaap_PreferredStockSharesOutstanding_B9C6671C786E870402DD7C3AF66B8CD1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_6927F8C5845B0DDD38A97C3AF66B1DE7" xlink:type="locator" />
    <link: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_76AAB69C5F9F316F69FE7C3AF66B54B8" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_6927F8C5845B0DDD38A97C3AF66B1DE7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommonStockSharesAuthorized" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_2A36810EDE811F6A76877C3AF66B5CB7" xlink:type="locator" />
    <link: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_76AAB69C5F9F316F69FE7C3AF66B54B8" xlink:to="loc_us-gaap_CommonStockSharesAuthorized_2A36810EDE811F6A76877C3AF66B5CB7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommonStockSharesIssued" xlink:label="loc_us-gaap_CommonStockSharesIssued_6A51A70ADEB9B08D6B687C3AF66B8104" xlink:type="locator" />
    <link: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_76AAB69C5F9F316F69FE7C3AF66B54B8" xlink:to="loc_us-gaap_CommonStockSharesIssued_6A51A70ADEB9B08D6B687C3AF66B8104" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_166852115B0A06B40B9A7C3AF66B3FD7" xlink:type="locator" />
    <link: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_76AAB69C5F9F316F69FE7C3AF66B54B8" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_166852115B0A06B40B9A7C3AF66B3FD7" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/ConsolidatedStatementsOfCashFlows" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementOfCashFlowsAbstract" xlink:label="loc_us-gaap_StatementOfCashFlowsAbstract_1E4B478A4B8A96A8B5D51933ED55DF1E" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_3241C9EBFDF9269EB5E01933ED554FC8" xlink:type="locator" />
    <link: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_1E4B478A4B8A96A8B5D51933ED55DF1E" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_3241C9EBFDF9269EB5E01933ED554FC8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_F1482C3C0E2A058E06DA1933ED559F0B" xlink:type="locator" />
    <link: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_3241C9EBFDF9269EB5E01933ED554FC8" xlink:to="loc_us-gaap_NetIncomeLoss_F1482C3C0E2A058E06DA1933ED559F0B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_7CB6BC5D56AA2B708BF01933ED556D05" xlink:type="locator" />
    <link: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_3241C9EBFDF9269EB5E01933ED554FC8" xlink:to="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_7CB6BC5D56AA2B708BF01933ED556D05" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_32AA2928C41310B65FFE1933ED55F360" xlink:type="locator" />
    <link: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_7CB6BC5D56AA2B708BF01933ED556D05" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_32AA2928C41310B65FFE1933ED55F360" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_us-gaap_ShareBasedCompensation_B6D68F7A4BF22EB1979B1933ED55E55F" xlink:type="locator" />
    <link: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_7CB6BC5D56AA2B708BF01933ED556D05" xlink:to="loc_us-gaap_ShareBasedCompensation_B6D68F7A4BF22EB1979B1933ED55E55F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_73BD13D1794046C51AEE1933ED55F4B5" xlink:type="locator" />
    <link: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_7CB6BC5D56AA2B708BF01933ED556D05" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_73BD13D1794046C51AEE1933ED55F4B5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaidInKindInterest" xlink:label="loc_us-gaap_PaidInKindInterest_5990B5C57C34621551DC1933ED55F247" xlink:type="locator" />
    <link: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_7CB6BC5D56AA2B708BF01933ED556D05" xlink:to="loc_us-gaap_PaidInKindInterest_5990B5C57C34621551DC1933ED55F247" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherNoncashIncomeExpense" xlink:label="loc_us-gaap_OtherNoncashIncomeExpense_2403F66705AA05C0A84D1933ED55D0AD" xlink:type="locator" />
    <link: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_7CB6BC5D56AA2B708BF01933ED556D05" xlink:to="loc_us-gaap_OtherNoncashIncomeExpense_2403F66705AA05C0A84D1933ED55D0AD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_4F2EA4A08CCCD61ADC571933ED55CB8C" xlink:type="locator" />
    <link: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_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_7CB6BC5D56AA2B708BF01933ED556D05" xlink:to="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_4F2EA4A08CCCD61ADC571933ED55CB8C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_FBC2BD18E19A0A3AA3161933ED560D77" xlink:type="locator" />
    <link: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_4F2EA4A08CCCD61ADC571933ED55CB8C" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_FBC2BD18E19A0A3AA3161933ED560D77" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInInventories" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_17DF5F7B6F2BA20B3AD41933ED562CB0" xlink:type="locator" />
    <link: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_4F2EA4A08CCCD61ADC571933ED55CB8C" xlink:to="loc_us-gaap_IncreaseDecreaseInInventories_17DF5F7B6F2BA20B3AD41933ED562CB0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidTaxes" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidTaxes_ACDCD72C805716CC58131933ED5693AB" xlink:type="locator" />
    <link: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_4F2EA4A08CCCD61ADC571933ED55CB8C" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidTaxes_ACDCD72C805716CC58131933ED5693AB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidExpense" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidExpense_D2423FF718DC290E9B541933ED56A015" xlink:type="locator" />
    <link: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_4F2EA4A08CCCD61ADC571933ED55CB8C" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidExpense_D2423FF718DC290E9B541933ED56A015" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInOtherNoncurrentAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentAssets_A47CCDFEDF210566AF951933ED56DCD4" xlink:type="locator" />
    <link: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_4F2EA4A08CCCD61ADC571933ED55CB8C" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentAssets_A47CCDFEDF210566AF951933ED56DCD4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_424D1790924D8DE9DE571933ED565F47" xlink:type="locator" />
    <link: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_4F2EA4A08CCCD61ADC571933ED55CB8C" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_424D1790924D8DE9DE571933ED565F47" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInDeferredRevenueAndCustomerAdvancesAndDeposits" xlink:label="loc_us-gaap_IncreaseDecreaseInDeferredRevenueAndCustomerAdvancesAndDeposits_76A05A2D49E92F52DDBF1933ED56C9E9" xlink:type="locator" />
    <link: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_4F2EA4A08CCCD61ADC571933ED55CB8C" xlink:to="loc_us-gaap_IncreaseDecreaseInDeferredRevenueAndCustomerAdvancesAndDeposits_76A05A2D49E92F52DDBF1933ED56C9E9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_653B0C0B57DBBAD0FC041933ED56E29B" xlink:type="locator" />
    <link: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_4F2EA4A08CCCD61ADC571933ED55CB8C" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_653B0C0B57DBBAD0FC041933ED56E29B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities_D81409B1950984157C781933ED56CB99" xlink:type="locator" />
    <link: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_4F2EA4A08CCCD61ADC571933ED55CB8C" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities_D81409B1950984157C781933ED56CB99" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_9B0C55B91C4F2A2CE7041933ED5623B1" xlink:type="locator" />
    <link: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_3241C9EBFDF9269EB5E01933ED554FC8" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_9B0C55B91C4F2A2CE7041933ED5623B1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_25B12103FB4876B930CC1933ED5642ED" xlink:type="locator" />
    <link: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_1E4B478A4B8A96A8B5D51933ED55DF1E" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_25B12103FB4876B930CC1933ED5642ED" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_B8A09ECFF113AC2F3A6C1933ED567C18" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_25B12103FB4876B930CC1933ED5642ED" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_B8A09ECFF113AC2F3A6C1933ED567C18" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_F711748C07AD9DA9166A1933ED56FE8E" xlink:type="locator" />
    <link: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_25B12103FB4876B930CC1933ED5642ED" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_F711748C07AD9DA9166A1933ED56FE8E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsForProceedsFromOtherInvestingActivities" xlink:label="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_D02258098E8C30278CA91933ED5657CF" xlink:type="locator" />
    <link: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_NetCashProvidedByUsedInInvestingActivitiesAbstract_25B12103FB4876B930CC1933ED5642ED" xlink:to="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_D02258098E8C30278CA91933ED5657CF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_FC8A9E478CD1FAD050901933ED568BDF" xlink:type="locator" />
    <link: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_NetCashProvidedByUsedInInvestingActivitiesAbstract_25B12103FB4876B930CC1933ED5642ED" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_FC8A9E478CD1FAD050901933ED568BDF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_B6D4423EC7B46CD82B581933ED56C383" xlink:type="locator" />
    <link: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_1E4B478A4B8A96A8B5D51933ED55DF1E" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_B6D4423EC7B46CD82B581933ED56C383" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProceedsFromStockOptionsExercised" xlink:label="loc_us-gaap_ProceedsFromStockOptionsExercised_88CD61F0A256B80F47A71933ED5606D4" xlink:type="locator" />
    <link: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_B6D4423EC7B46CD82B581933ED56C383" xlink:to="loc_us-gaap_ProceedsFromStockOptionsExercised_88CD61F0A256B80F47A71933ED5606D4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_EE6CD8DA5CAF674E0A7E1933ED568A4E" xlink:type="locator" />
    <link: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_B6D4423EC7B46CD82B581933ED56C383" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_EE6CD8DA5CAF674E0A7E1933ED568A4E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RepaymentsOfLongTermLinesOfCredit" xlink:label="loc_us-gaap_RepaymentsOfLongTermLinesOfCredit_69CE1E2F9539EF28775D1933ED569C04" xlink:type="locator" />
    <link: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_NetCashProvidedByUsedInFinancingActivitiesAbstract_B6D4423EC7B46CD82B581933ED56C383" xlink:to="loc_us-gaap_RepaymentsOfLongTermLinesOfCredit_69CE1E2F9539EF28775D1933ED569C04" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProceedsFromLongTermLinesOfCredit" xlink:label="loc_us-gaap_ProceedsFromLongTermLinesOfCredit_FBF5B794257C885306351933ED572CD5" xlink:type="locator" />
    <link: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_NetCashProvidedByUsedInFinancingActivitiesAbstract_B6D4423EC7B46CD82B581933ED56C383" xlink:to="loc_us-gaap_ProceedsFromLongTermLinesOfCredit_FBF5B794257C885306351933ED572CD5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProceedsFromOtherEquity" xlink:label="loc_us-gaap_ProceedsFromOtherEquity_4CE9E4A4E47BE65024E91933ED5773FA" xlink:type="locator" />
    <link: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_NetCashProvidedByUsedInFinancingActivitiesAbstract_B6D4423EC7B46CD82B581933ED56C383" xlink:to="loc_us-gaap_ProceedsFromOtherEquity_4CE9E4A4E47BE65024E91933ED5773FA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_0BD19C9C9D1B98B33AC11933ED579B49" xlink:type="locator" />
    <link: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_NetCashProvidedByUsedInFinancingActivitiesAbstract_B6D4423EC7B46CD82B581933ED56C383" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_0BD19C9C9D1B98B33AC11933ED579B49" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents" xlink:label="loc_us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents_F55B2EEFE33C71C8531D1933ED572B57" xlink:type="locator" />
    <link: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_1E4B478A4B8A96A8B5D51933ED55DF1E" xlink:to="loc_us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents_F55B2EEFE33C71C8531D1933ED572B57" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_A15F58939BB53E025A5E1933ED57E8CB" xlink:type="locator" />
    <link: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_1E4B478A4B8A96A8B5D51933ED55DF1E" xlink:to="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_A15F58939BB53E025A5E1933ED57E8CB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_DDEC0E901FFB00192C881933ED578023" xlink:type="locator" />
    <link: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_1E4B478A4B8A96A8B5D51933ED55DF1E" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_DDEC0E901FFB00192C881933ED578023" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_1A0969FCB7900D4C0F5B1933ED574E81" xlink:type="locator" />
    <link: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_1E4B478A4B8A96A8B5D51933ED55DF1E" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_1A0969FCB7900D4C0F5B1933ED574E81" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SupplementalCashFlowInformationAbstract" xlink:label="loc_us-gaap_SupplementalCashFlowInformationAbstract_F20CE7099F023F95CB3B1933ED571E6D" xlink:type="locator" />
    <link: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_1E4B478A4B8A96A8B5D51933ED55DF1E" xlink:to="loc_us-gaap_SupplementalCashFlowInformationAbstract_F20CE7099F023F95CB3B1933ED571E6D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InterestPaid" xlink:label="loc_us-gaap_InterestPaid_4CFA5D592792E78AA5BC1933ED570D27" xlink:type="locator" />
    <link: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_F20CE7099F023F95CB3B1933ED571E6D" xlink:to="loc_us-gaap_InterestPaid_4CFA5D592792E78AA5BC1933ED570D27" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxesPaidNet" xlink:label="loc_us-gaap_IncomeTaxesPaidNet_7BA691E7DA0F0FE64D601933ED572CE0" xlink:type="locator" />
    <link: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_F20CE7099F023F95CB3B1933ED571E6D" xlink:to="loc_us-gaap_IncomeTaxesPaidNet_7BA691E7DA0F0FE64D601933ED572CE0" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/ConsolidatedStatementsOfOperationsAndComprehensiveIncome" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeStatementAbstract" xlink:label="loc_us-gaap_IncomeStatementAbstract_ECBBF12B5CC6EEEE0A2F7C3AF657D23C" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues_371392E53D631FC0B56D7C3AF6577010" xlink:type="locator" />
    <link: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_ECBBF12B5CC6EEEE0A2F7C3AF657D23C" xlink:to="loc_us-gaap_Revenues_371392E53D631FC0B56D7C3AF6577010" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CostOfRevenue" xlink:label="loc_us-gaap_CostOfRevenue_089FB64C084706262AA57C3AF657EACA" xlink:type="locator" />
    <link: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_ECBBF12B5CC6EEEE0A2F7C3AF657D23C" xlink:to="loc_us-gaap_CostOfRevenue_089FB64C084706262AA57C3AF657EACA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GrossProfit" xlink:label="loc_us-gaap_GrossProfit_7B86B4628A1F8C8D69107C3AF6572F55" xlink:type="locator" />
    <link: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_ECBBF12B5CC6EEEE0A2F7C3AF657D23C" xlink:to="loc_us-gaap_GrossProfit_7B86B4628A1F8C8D69107C3AF6572F55" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingExpensesAbstract" xlink:label="loc_us-gaap_OperatingExpensesAbstract_D855A977B24DB1DAABC67C3AF657BFF9" xlink:type="locator" />
    <link: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_ECBBF12B5CC6EEEE0A2F7C3AF657D23C" xlink:to="loc_us-gaap_OperatingExpensesAbstract_D855A977B24DB1DAABC67C3AF657BFF9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpense" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_23773C5705CBDC1065547C3AF65760FF" xlink:type="locator" />
    <link: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_D855A977B24DB1DAABC67C3AF657BFF9" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_23773C5705CBDC1065547C3AF65760FF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ResearchAndDevelopmentExpense" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_705AB5436AF1083208017C3AF6577AAE" xlink:type="locator" />
    <link: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_D855A977B24DB1DAABC67C3AF657BFF9" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpense_705AB5436AF1083208017C3AF6577AAE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_E488D3EEAC7EC22FAC307C3AF65752FE" xlink:type="locator" />
    <link: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_D855A977B24DB1DAABC67C3AF657BFF9" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_E488D3EEAC7EC22FAC307C3AF65752FE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RestructuringCharges" xlink:label="loc_us-gaap_RestructuringCharges_E9E61EFF2285C6BEEBAD7C3AF657152F" xlink:type="locator" />
    <link: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_D855A977B24DB1DAABC67C3AF657BFF9" xlink:to="loc_us-gaap_RestructuringCharges_E9E61EFF2285C6BEEBAD7C3AF657152F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationAcquisitionRelatedCosts" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_0510FA1622A277F18E387C3AF657E919" xlink:type="locator" />
    <link: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_D855A977B24DB1DAABC67C3AF657BFF9" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_0510FA1622A277F18E387C3AF657E919" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingExpenses" xlink:label="loc_us-gaap_OperatingExpenses_795B298E56C09CDD169E7C3AF657ABAA" xlink:type="locator" />
    <link: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_OperatingExpensesAbstract_D855A977B24DB1DAABC67C3AF657BFF9" xlink:to="loc_us-gaap_OperatingExpenses_795B298E56C09CDD169E7C3AF657ABAA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_9EA90DF6EF2EDE5839317C3AF6572B58" xlink:type="locator" />
    <link: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_ECBBF12B5CC6EEEE0A2F7C3AF657D23C" xlink:to="loc_us-gaap_OperatingIncomeLoss_9EA90DF6EF2EDE5839317C3AF6572B58" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InvestmentIncomeInterest" xlink:label="loc_us-gaap_InvestmentIncomeInterest_FD9327228136224C7E1C7C3AF657CA02" xlink:type="locator" />
    <link: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_ECBBF12B5CC6EEEE0A2F7C3AF657D23C" xlink:to="loc_us-gaap_InvestmentIncomeInterest_FD9327228136224C7E1C7C3AF657CA02" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InterestExpense" xlink:label="loc_us-gaap_InterestExpense_7B09D3637CFA514643C07C3AF657F764" xlink:type="locator" />
    <link: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_ECBBF12B5CC6EEEE0A2F7C3AF657D23C" xlink:to="loc_us-gaap_InterestExpense_7B09D3637CFA514643C07C3AF657F764" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_CBE832BEDC184860C91B7C3AF657A311" xlink:type="locator" />
    <link: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_ECBBF12B5CC6EEEE0A2F7C3AF657D23C" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_CBE832BEDC184860C91B7C3AF657A311" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_98931F7831685EC248E07C3AF657A15C" xlink:type="locator" />
    <link: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_ECBBF12B5CC6EEEE0A2F7C3AF657D23C" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_98931F7831685EC248E07C3AF657A15C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_E5EB9CCEE32574E9E1157C3AF65753C7" xlink:type="locator" />
    <link: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_ECBBF12B5CC6EEEE0A2F7C3AF657D23C" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_E5EB9CCEE32574E9E1157C3AF65753C7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_73B6423CEC5971FD87E17C3AF6572CBB" xlink:type="locator" />
    <link:presentationArc order="11" 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_ECBBF12B5CC6EEEE0A2F7C3AF657D23C" xlink:to="loc_us-gaap_NetIncomeLoss_73B6423CEC5971FD87E17C3AF6572CBB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="loc_us-gaap_EarningsPerShareBasic_D4485C7A3299448B57517C3AF6572937" xlink:type="locator" />
    <link: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_ECBBF12B5CC6EEEE0A2F7C3AF657D23C" xlink:to="loc_us-gaap_EarningsPerShareBasic_D4485C7A3299448B57517C3AF6572937" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="loc_us-gaap_EarningsPerShareDiluted_266CC4BAF0C8DF7848847C3AF657C017" xlink:type="locator" />
    <link:presentationArc order="13" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_ECBBF12B5CC6EEEE0A2F7C3AF657D23C" xlink:to="loc_us-gaap_EarningsPerShareDiluted_266CC4BAF0C8DF7848847C3AF657C017" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_WeightedAverageNumberBasicAndDilutedSharesOutstandingAbstract" xlink:label="loc_mrcy_WeightedAverageNumberBasicAndDilutedSharesOutstandingAbstract_992A282BE93D4E37D4427C3AF657DF30" xlink:type="locator" />
    <link: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_ECBBF12B5CC6EEEE0A2F7C3AF657D23C" xlink:to="loc_mrcy_WeightedAverageNumberBasicAndDilutedSharesOutstandingAbstract_992A282BE93D4E37D4427C3AF657DF30" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_065DA2CE56F4B753DB187C3AF657EAF4" xlink:type="locator" />
    <link: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_992A282BE93D4E37D4427C3AF657DF30" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_065DA2CE56F4B753DB187C3AF657EAF4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_1ADF8E49644FEF72944F7C3AF657E69F" xlink:type="locator" />
    <link: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_992A282BE93D4E37D4427C3AF657DF30" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_1ADF8E49644FEF72944F7C3AF657E69F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxAbstract" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_DBC2187E966BFF275B1D7C3AF657464E" xlink:type="locator" />
    <link:presentationArc order="15" 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_ECBBF12B5CC6EEEE0A2F7C3AF657D23C" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_DBC2187E966BFF275B1D7C3AF657464E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_F5CFF59F67103B74AF167C3AF657B5A8" xlink:type="locator" />
    <link:presentationArc order="1" 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_ComprehensiveIncomeNetOfTaxAbstract_DBC2187E966BFF275B1D7C3AF657464E" xlink:to="loc_us-gaap_NetIncomeLoss_F5CFF59F67103B74AF167C3AF657B5A8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_58DEF2FEE04AC448312A7C3AF657C61E" xlink:type="locator" />
    <link: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_DBC2187E966BFF275B1D7C3AF657464E" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_58DEF2FEE04AC448312A7C3AF657C61E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_9768D400916122F43D607C3AF65768E7" xlink:type="locator" />
    <link: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_ComprehensiveIncomeNetOfTaxAbstract_DBC2187E966BFF275B1D7C3AF657464E" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_9768D400916122F43D607C3AF65768E7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_E6D1DAD75E75129D5D067C3AF6577C77" xlink:type="locator" />
    <link: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_ComprehensiveIncomeNetOfTaxAbstract_DBC2187E966BFF275B1D7C3AF657464E" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_E6D1DAD75E75129D5D067C3AF6577C77" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_07621695B0AEE54C54A77C3AF657559F" xlink:type="locator" />
    <link: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_ComprehensiveIncomeNetOfTaxAbstract_DBC2187E966BFF275B1D7C3AF657464E" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTax_07621695B0AEE54C54A77C3AF657559F" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/Debt" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="loc_us-gaap_DebtDisclosureAbstract_6A6632BFDE4FFBCBDDEA7C3AF6A73889" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtDisclosureTextBlock" xlink:label="loc_us-gaap_DebtDisclosureTextBlock_FB58FA864C8945C132987C3AF6A75E57" xlink:type="locator" />
    <link: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_6A6632BFDE4FFBCBDDEA7C3AF6A73889" xlink:to="loc_us-gaap_DebtDisclosureTextBlock_FB58FA864C8945C132987C3AF6A75E57" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/DebtAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="loc_us-gaap_DebtDisclosureAbstract_502D8CAA50ED45E71AED192E8E904E1C" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="loc_us-gaap_DebtInstrumentTable_C452340AFACE8F116F23192E8E907841" xlink:type="locator" />
    <link: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_502D8CAA50ED45E71AED192E8E904E1C" xlink:to="loc_us-gaap_DebtInstrumentTable_C452340AFACE8F116F23192E8E907841" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CreditFacilityAxis" xlink:label="loc_us-gaap_CreditFacilityAxis_6AFCA554CF135E77013C192E8E902449" xlink:type="locator" />
    <link: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_C452340AFACE8F116F23192E8E907841" xlink:to="loc_us-gaap_CreditFacilityAxis_6AFCA554CF135E77013C192E8E902449" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_51F3FA0B78EED493ABC8192E8E907389" xlink:type="locator" />
    <link: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_6AFCA554CF135E77013C192E8E902449" xlink:to="loc_us-gaap_CreditFacilityDomain_51F3FA0B78EED493ABC8192E8E907389" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RevolvingCreditFacilityMember" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_53DACD96F5DC40185BA6192E8E90D7B7" xlink:type="locator" />
    <link: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_51F3FA0B78EED493ABC8192E8E907389" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_53DACD96F5DC40185BA6192E8E90D7B7" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_TermLoanMember" xlink:label="loc_mrcy_TermLoanMember_37AB75DF152D1E96F7A8192E8E907D93" xlink:type="locator" />
    <link: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_51F3FA0B78EED493ABC8192E8E907389" xlink:to="loc_mrcy_TermLoanMember_37AB75DF152D1E96F7A8192E8E907D93" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_BE7DD085AC1924174901192E8E907102" xlink:type="locator" />
    <link: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_DebtInstrumentTable_C452340AFACE8F116F23192E8E907841" xlink:to="loc_us-gaap_DebtInstrumentLineItems_BE7DD085AC1924174901192E8E907102" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_E3E72ECD79C4F99E6AAB192E8E909774" xlink:type="locator" />
    <link: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_DebtInstrumentLineItems_BE7DD085AC1924174901192E8E907102" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_E3E72ECD79C4F99E6AAB192E8E909774" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentTerm" xlink:label="loc_us-gaap_DebtInstrumentTerm_260FFAA3291C17D9E6D0192E8E906AC4" xlink:type="locator" />
    <link: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_BE7DD085AC1924174901192E8E907102" xlink:to="loc_us-gaap_DebtInstrumentTerm_260FFAA3291C17D9E6D0192E8E906AC4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredFinanceCostsGross" xlink:label="loc_us-gaap_DeferredFinanceCostsGross_2B1B0477BED652B5E4ED192E8E91A50F" xlink:type="locator" />
    <link: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_DebtInstrumentLineItems_BE7DD085AC1924174901192E8E907102" xlink:to="loc_us-gaap_DeferredFinanceCostsGross_2B1B0477BED652B5E4ED192E8E91A50F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProceedsFromLinesOfCredit" xlink:label="loc_us-gaap_ProceedsFromLinesOfCredit_91FB5625849794856C91192E8E912048" xlink:type="locator" />
    <link: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_DebtInstrumentLineItems_BE7DD085AC1924174901192E8E907102" xlink:to="loc_us-gaap_ProceedsFromLinesOfCredit_91FB5625849794856C91192E8E912048" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SecuredLongTermDebt" xlink:label="loc_us-gaap_SecuredLongTermDebt_93857D09A4813C4D8225193013722DF2" xlink:type="locator" />
    <link: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_BE7DD085AC1924174901192E8E907102" xlink:to="loc_us-gaap_SecuredLongTermDebt_93857D09A4813C4D8225193013722DF2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InterestExpense" xlink:label="loc_us-gaap_InterestExpense_F7D2740666F79623E4BF1933D50293A5" xlink:type="locator" />
    <link: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_DebtInstrumentLineItems_BE7DD085AC1924174901192E8E907102" xlink:to="loc_us-gaap_InterestExpense_F7D2740666F79623E4BF1933D50293A5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LettersOfCreditOutstandingAmount" xlink:label="loc_us-gaap_LettersOfCreditOutstandingAmount_6F6DF8F02FAA6A0307D7192E8E916A38" xlink:type="locator" />
    <link: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_DebtInstrumentLineItems_BE7DD085AC1924174901192E8E907102" xlink:to="loc_us-gaap_LettersOfCreditOutstandingAmount_6F6DF8F02FAA6A0307D7192E8E916A38" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/DescriptionOfBusiness" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_73E6F75FCD7B99EA12207C3AF6573141" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NatureOfOperations" xlink:label="loc_us-gaap_NatureOfOperations_FD32D85BBC6078D2F2DF7C3AF657BBD5" xlink:type="locator" />
    <link: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_73E6F75FCD7B99EA12207C3AF6573141" xlink:to="loc_us-gaap_NatureOfOperations_FD32D85BBC6078D2F2DF7C3AF657BBD5" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/DescriptionOfBusinessDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_1FDCAC115D4F3D89E4107C3AF701652A" xlink:type="locator" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_NatureofBusinessNumberofProgramsUsingProductsandServices" xlink:label="loc_mrcy_NatureofBusinessNumberofProgramsUsingProductsandServices_0E91D16A2C9DED99E71D7C3AF701A87A" xlink:type="locator" />
    <link: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_1FDCAC115D4F3D89E4107C3AF701652A" xlink:to="loc_mrcy_NatureofBusinessNumberofProgramsUsingProductsandServices_0E91D16A2C9DED99E71D7C3AF701A87A" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_NatureofBusinessNumberofDefensePrimeContractorsUsingProductsandServices" xlink:label="loc_mrcy_NatureofBusinessNumberofDefensePrimeContractorsUsingProductsandServices_E695286C77B2AA727AE07C3AF7010097" xlink:type="locator" />
    <link: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_1FDCAC115D4F3D89E4107C3AF701652A" xlink:to="loc_mrcy_NatureofBusinessNumberofDefensePrimeContractorsUsingProductsandServices_E695286C77B2AA727AE07C3AF7010097" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/DocumentAndEntityInformation" xlink:type="extended">
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_DocumentDocumentandEntityInformationAbstract" xlink:label="loc_mrcy_DocumentDocumentandEntityInformationAbstract_F77AFA705437B4BD45A47C3AF69DDBB1" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentType" xlink:label="loc_dei_DocumentType_15C4D4FB071EE387D1C67C3AF69D560A" xlink:type="locator" />
    <link: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_F77AFA705437B4BD45A47C3AF69DDBB1" xlink:to="loc_dei_DocumentType_15C4D4FB071EE387D1C67C3AF69D560A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_AmendmentFlag" xlink:label="loc_dei_AmendmentFlag_05E1803DDFED1F73CC007C3AF69DD7EA" xlink:type="locator" />
    <link: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_DocumentDocumentandEntityInformationAbstract_F77AFA705437B4BD45A47C3AF69DDBB1" xlink:to="loc_dei_AmendmentFlag_05E1803DDFED1F73CC007C3AF69DD7EA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentPeriodEndDate" xlink:label="loc_dei_DocumentPeriodEndDate_F071B2A02877B0425C337C3AF69D8262" xlink:type="locator" />
    <link: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_DocumentDocumentandEntityInformationAbstract_F77AFA705437B4BD45A47C3AF69DDBB1" xlink:to="loc_dei_DocumentPeriodEndDate_F071B2A02877B0425C337C3AF69D8262" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentFiscalYearFocus" xlink:label="loc_dei_DocumentFiscalYearFocus_E9B33AEED58099E3161E7C3AF69D39AD" xlink:type="locator" />
    <link: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_mrcy_DocumentDocumentandEntityInformationAbstract_F77AFA705437B4BD45A47C3AF69DDBB1" xlink:to="loc_dei_DocumentFiscalYearFocus_E9B33AEED58099E3161E7C3AF69D39AD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentFiscalPeriodFocus" xlink:label="loc_dei_DocumentFiscalPeriodFocus_3BE17DA76A2A05F8DAD77C3AF69D9B55" xlink:type="locator" />
    <link: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_mrcy_DocumentDocumentandEntityInformationAbstract_F77AFA705437B4BD45A47C3AF69DDBB1" xlink:to="loc_dei_DocumentFiscalPeriodFocus_3BE17DA76A2A05F8DAD77C3AF69D9B55" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_TradingSymbol" xlink:label="loc_dei_TradingSymbol_FC375342C86E6A2872D47C3AF69D560A" xlink:type="locator" />
    <link: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_mrcy_DocumentDocumentandEntityInformationAbstract_F77AFA705437B4BD45A47C3AF69DDBB1" xlink:to="loc_dei_TradingSymbol_FC375342C86E6A2872D47C3AF69D560A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityRegistrantName" xlink:label="loc_dei_EntityRegistrantName_00AE70E4563D06A190027C3AF69D5F05" xlink:type="locator" />
    <link: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_mrcy_DocumentDocumentandEntityInformationAbstract_F77AFA705437B4BD45A47C3AF69DDBB1" xlink:to="loc_dei_EntityRegistrantName_00AE70E4563D06A190027C3AF69D5F05" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityCentralIndexKey" xlink:label="loc_dei_EntityCentralIndexKey_44933C698A9B34B025417C3AF69D4CD1" xlink:type="locator" />
    <link: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_mrcy_DocumentDocumentandEntityInformationAbstract_F77AFA705437B4BD45A47C3AF69DDBB1" xlink:to="loc_dei_EntityCentralIndexKey_44933C698A9B34B025417C3AF69D4CD1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_CurrentFiscalYearEndDate" xlink:label="loc_dei_CurrentFiscalYearEndDate_18DF1DB878659FA667F67C3AF69DE140" xlink:type="locator" />
    <link: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_mrcy_DocumentDocumentandEntityInformationAbstract_F77AFA705437B4BD45A47C3AF69DDBB1" xlink:to="loc_dei_CurrentFiscalYearEndDate_18DF1DB878659FA667F67C3AF69DE140" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityFilerCategory" xlink:label="loc_dei_EntityFilerCategory_A9DFFD3AA4407E59F4A57C3AF69DC025" xlink:type="locator" />
    <link: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_mrcy_DocumentDocumentandEntityInformationAbstract_F77AFA705437B4BD45A47C3AF69DDBB1" xlink:to="loc_dei_EntityFilerCategory_A9DFFD3AA4407E59F4A57C3AF69DC025" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityCommonStockSharesOutstanding" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_C99B9FEF0144138092577C3AF69D3B80" xlink:type="locator" />
    <link: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_mrcy_DocumentDocumentandEntityInformationAbstract_F77AFA705437B4BD45A47C3AF69DDBB1" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_C99B9FEF0144138092577C3AF69D3B80" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/EmployeeBenefitPlanDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CompensationAndRetirementDisclosureAbstract" xlink:label="loc_us-gaap_CompensationAndRetirementDisclosureAbstract_1461E47EB69856C30256192B3F7A26F2" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_DE125F264F97CFCE1F77192B3F7ACBC8" xlink:type="locator" />
    <link: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_CompensationAndRetirementDisclosureAbstract_1461E47EB69856C30256192B3F7A26F2" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_DE125F264F97CFCE1F77192B3F7ACBC8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis" xlink:label="loc_us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis_19C9B39CD649086967C8192B3F7AB679" xlink:type="locator" />
    <link: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_ScheduleOfDefinedBenefitPlansDisclosuresTable_DE125F264F97CFCE1F77192B3F7ACBC8" xlink:to="loc_us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis_19C9B39CD649086967C8192B3F7AB679" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlansDomain" xlink:label="loc_us-gaap_DefinedBenefitPlansDomain_F29AF67E1E07E1FBA3CC192B3F7ABC04" xlink:type="locator" />
    <link: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_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis_19C9B39CD649086967C8192B3F7AB679" xlink:to="loc_us-gaap_DefinedBenefitPlansDomain_F29AF67E1E07E1FBA3CC192B3F7ABC04" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_0C8CDFFCEB73D5829616192B3F7A9BA4" xlink:type="locator" />
    <link: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_DefinedBenefitPlansDomain_F29AF67E1E07E1FBA3CC192B3F7ABC04" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_0C8CDFFCEB73D5829616192B3F7A9BA4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BalanceSheetLocationAxis" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_0B44E74FF903583C3439192B3F7BF6E3" xlink:type="locator" />
    <link: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_ScheduleOfDefinedBenefitPlansDisclosuresTable_DE125F264F97CFCE1F77192B3F7ACBC8" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_0B44E74FF903583C3439192B3F7BF6E3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BalanceSheetLocationDomain" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_A7280223891A3B9C3FC1192B3F7BBB63" xlink:type="locator" />
    <link: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_BalanceSheetLocationAxis_0B44E74FF903583C3439192B3F7BF6E3" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_A7280223891A3B9C3FC1192B3F7BBB63" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherNoncurrentLiabilitiesMember" xlink:label="loc_us-gaap_OtherNoncurrentLiabilitiesMember_EC2CBA37B36C9FF34672192B3F7B9765" xlink:type="locator" />
    <link: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_BalanceSheetLocationDomain_A7280223891A3B9C3FC1192B3F7BBB63" xlink:to="loc_us-gaap_OtherNoncurrentLiabilitiesMember_EC2CBA37B36C9FF34672192B3F7B9765" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_1A96A31CD5CC76D92EA3192B3F7BF607" xlink:type="locator" />
    <link: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_ScheduleOfDefinedBenefitPlansDisclosuresTable_DE125F264F97CFCE1F77192B3F7ACBC8" xlink:to="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_1A96A31CD5CC76D92EA3192B3F7BF607" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet" xlink:label="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet_0209DAE7FD3599E11C36192B3F7B5319" xlink:type="locator" />
    <link: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_DefinedBenefitPlanDisclosureLineItems_1A96A31CD5CC76D92EA3192B3F7BF607" xlink:to="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet_0209DAE7FD3599E11C36192B3F7B5319" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_EA4E29528F31B1A71452192B3F7BC756" xlink:type="locator" />
    <link: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_DefinedBenefitPlanDisclosureLineItems_1A96A31CD5CC76D92EA3192B3F7BF607" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_EA4E29528F31B1A71452192B3F7BC756" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_D2C9CF84D30B3313994D192B3F7BA657" xlink:type="locator" />
    <link: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_DefinedBenefitPlanDisclosureLineItems_1A96A31CD5CC76D92EA3192B3F7BF607" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_D2C9CF84D30B3313994D192B3F7BA657" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlansEstimatedFutureEmployerContributionsInCurrentFiscalYear" xlink:label="loc_us-gaap_DefinedBenefitPlansEstimatedFutureEmployerContributionsInCurrentFiscalYear_3BD474F27EF388A45362192B3F7B8E66" xlink:type="locator" />
    <link: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_DefinedBenefitPlanDisclosureLineItems_1A96A31CD5CC76D92EA3192B3F7BF607" xlink:to="loc_us-gaap_DefinedBenefitPlansEstimatedFutureEmployerContributionsInCurrentFiscalYear_3BD474F27EF388A45362192B3F7B8E66" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/EmployeeBenefitPlanEmployeeBenefitPlan" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CompensationAndRetirementDisclosureAbstract" xlink:label="loc_us-gaap_CompensationAndRetirementDisclosureAbstract_3ADC71DE6AE5DB4A23527C3AF6C5431B" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock" xlink:label="loc_us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock_B2AE5ADC658114390AC47C3AF6C507E4" xlink:type="locator" />
    <link: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_CompensationAndRetirementDisclosureAbstract_3ADC71DE6AE5DB4A23527C3AF6C5431B" xlink:to="loc_us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock_B2AE5ADC658114390AC47C3AF6C507E4" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/FairValueOfFinancialInstruments" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract_F25E21918C16D0D8949F7C3AF6D95268" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueDisclosuresTextBlock" xlink:label="loc_us-gaap_FairValueDisclosuresTextBlock_C6B6B9D3AB5390C4D39E7C3AF6D9D6CB" xlink:type="locator" />
    <link: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_F25E21918C16D0D8949F7C3AF6D95268" xlink:to="loc_us-gaap_FairValueDisclosuresTextBlock_C6B6B9D3AB5390C4D39E7C3AF6D9D6CB" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/FairValueOfFinancialInstrumentsSummaryOfFinancialAssetsMeasuredAtFairValueOnRecurringBasisDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract_F43FD02E8BF51053C2B77C3AF67F1988" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_73BEDF861EC2264F46027C3AF67FEA47" xlink:type="locator" />
    <link: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_F43FD02E8BF51053C2B77C3AF67F1988" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_73BEDF861EC2264F46027C3AF67FEA47" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueByMeasurementBasisAxis" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_097748C20280EF789EF77C3AF67F0A15" xlink:type="locator" />
    <link: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_73BEDF861EC2264F46027C3AF67FEA47" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_097748C20280EF789EF77C3AF67F0A15" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueDisclosureItemAmountsDomain" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_8C310D86DBD523F20E317C3AF67F242D" xlink:type="locator" />
    <link: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_097748C20280EF789EF77C3AF67F0A15" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_8C310D86DBD523F20E317C3AF67F242D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_62546F1D7AB0316F12C07C3AF67F0DAF" xlink:type="locator" />
    <link: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_8C310D86DBD523F20E317C3AF67F242D" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_62546F1D7AB0316F12C07C3AF67F0DAF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_71E487F7E9769C9DA9A97C3AF67FD7C2" xlink:type="locator" />
    <link: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_8C310D86DBD523F20E317C3AF67F242D" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_71E487F7E9769C9DA9A97C3AF67FD7C2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_B1272E9E0A7B14BBCF127C3AF67F7198" xlink:type="locator" />
    <link: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_73BEDF861EC2264F46027C3AF67FEA47" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_B1272E9E0A7B14BBCF127C3AF67F7198" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_6F672D55DE4363AA46007C3AF689C141" xlink:type="locator" />
    <link: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_B1272E9E0A7B14BBCF127C3AF67F7198" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_6F672D55DE4363AA46007C3AF689C141" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_494B11EE26D4F2BCC6877C3AF68973C9" xlink:type="locator" />
    <link: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_6F672D55DE4363AA46007C3AF689C141" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_494B11EE26D4F2BCC6877C3AF68973C9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_33A6BB53421A6AD1B7F47C3AF689129C" xlink:type="locator" />
    <link: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_73BEDF861EC2264F46027C3AF67FEA47" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_33A6BB53421A6AD1B7F47C3AF689129C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_791D810BE5CB00583D3B7C3AF68917DB" xlink:type="locator" />
    <link: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_33A6BB53421A6AD1B7F47C3AF689129C" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_791D810BE5CB00583D3B7C3AF68917DB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_30DD24FAF238265D3A6D7C3AF68901DA" xlink:type="locator" />
    <link: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_791D810BE5CB00583D3B7C3AF68917DB" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_30DD24FAF238265D3A6D7C3AF68901DA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_7E4692F3ADE2007DD0897C3AF689F6BA" xlink:type="locator" />
    <link: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_791D810BE5CB00583D3B7C3AF68917DB" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_7E4692F3ADE2007DD0897C3AF689F6BA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_81D78DBBDAB6D20F15807C3AF689855A" xlink:type="locator" />
    <link: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_791D810BE5CB00583D3B7C3AF68917DB" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_81D78DBBDAB6D20F15807C3AF689855A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueByAssetClassAxis" xlink:label="loc_us-gaap_FairValueByAssetClassAxis_780F2C61121D1B4CA8F27C3AF6894DBA" xlink:type="locator" />
    <link: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_73BEDF861EC2264F46027C3AF67FEA47" xlink:to="loc_us-gaap_FairValueByAssetClassAxis_780F2C61121D1B4CA8F27C3AF6894DBA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_BEC0B637E592EE10DFBF7C3AF689A919" xlink:type="locator" />
    <link: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_780F2C61121D1B4CA8F27C3AF6894DBA" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_BEC0B637E592EE10DFBF7C3AF689A919" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CertificatesOfDepositMember" xlink:label="loc_us-gaap_CertificatesOfDepositMember_F0C3FF839E3AE584D73B7C3AF689743A" xlink:type="locator" />
    <link: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_BEC0B637E592EE10DFBF7C3AF689A919" xlink:to="loc_us-gaap_CertificatesOfDepositMember_F0C3FF839E3AE584D73B7C3AF689743A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_79BB2891C1D49445B1E57C3AF68944DB" xlink:type="locator" />
    <link: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_73BEDF861EC2264F46027C3AF67FEA47" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_79BB2891C1D49445B1E57C3AF68944DB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AssetsFairValueDisclosureAbstract" xlink:label="loc_us-gaap_AssetsFairValueDisclosureAbstract_900FB508397D65BFA04A7C3AF689C665" xlink:type="locator" />
    <link: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_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_79BB2891C1D49445B1E57C3AF68944DB" xlink:to="loc_us-gaap_AssetsFairValueDisclosureAbstract_900FB508397D65BFA04A7C3AF689C665" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AssetsFairValueDisclosure" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_BC5FFE31A35CED2ECB917C3AF6898170" xlink:type="locator" />
    <link: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_900FB508397D65BFA04A7C3AF689C665" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_BC5FFE31A35CED2ECB917C3AF6898170" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/FairValueOfFinancialInstrumentsTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract_A9C3F6B03BC2397DD8007C3AF70B913F" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock_FB9AF5E64ED2CE2A923E7C3AF70B6B12" xlink:type="locator" />
    <link: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_A9C3F6B03BC2397DD8007C3AF70B913F" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock_FB9AF5E64ED2CE2A923E7C3AF70B6B12" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/Goodwill" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_713A1AE33ADEDB856B1E7C3AF6CF044C" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GoodwillDisclosureTextBlock" xlink:label="loc_us-gaap_GoodwillDisclosureTextBlock_37694C179E47C05F400A7C3AF6CFCD1E" xlink:type="locator" />
    <link: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_713A1AE33ADEDB856B1E7C3AF6CF044C" xlink:to="loc_us-gaap_GoodwillDisclosureTextBlock_37694C179E47C05F400A7C3AF6CFCD1E" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/GoodwillTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_F75771A2FE19628459E17C3AF69DBD01" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfGoodwillTextBlock" xlink:label="loc_us-gaap_ScheduleOfGoodwillTextBlock_F0E4CE2CA27A9A30CEE87C3AF69D3786" xlink:type="locator" />
    <link: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_F75771A2FE19628459E17C3AF69DBD01" xlink:to="loc_us-gaap_ScheduleOfGoodwillTextBlock_F0E4CE2CA27A9A30CEE87C3AF69D3786" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/IncomeTaxes" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="loc_us-gaap_IncomeTaxDisclosureAbstract_0080D1B6BF16F7D95EAA7C3AF6938924" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxDisclosureTextBlock" xlink:label="loc_us-gaap_IncomeTaxDisclosureTextBlock_65AAD6983C9D0101846D7C3AF693A245" xlink:type="locator" />
    <link: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_0080D1B6BF16F7D95EAA7C3AF6938924" xlink:to="loc_us-gaap_IncomeTaxDisclosureTextBlock_65AAD6983C9D0101846D7C3AF693A245" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/IncomeTaxesAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="loc_us-gaap_IncomeTaxDisclosureAbstract_B0CB59DFF0ECE7EDDCC81933EC6D893F" xlink:type="locator" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_TaxCutsAndJobsActOf2017FederalStatutoryRateBlendedRateForNextFiscalYear" xlink:label="loc_mrcy_TaxCutsAndJobsActOf2017FederalStatutoryRateBlendedRateForNextFiscalYear_88B37708F05730664FE51933EC6D67E5" xlink:type="locator" />
    <link: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_B0CB59DFF0ECE7EDDCC81933EC6D893F" xlink:to="loc_mrcy_TaxCutsAndJobsActOf2017FederalStatutoryRateBlendedRateForNextFiscalYear_88B37708F05730664FE51933EC6D67E5" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_TaxCutsAndJobsActOf2017FederalStatutoryRateBlendedRateForYearsSubsequentToNextFiscalYear" xlink:label="loc_mrcy_TaxCutsAndJobsActOf2017FederalStatutoryRateBlendedRateForYearsSubsequentToNextFiscalYear_098596C44A9B48DE0DB01933EC6DBC13" xlink:type="locator" />
    <link: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_IncomeTaxDisclosureAbstract_B0CB59DFF0ECE7EDDCC81933EC6D893F" xlink:to="loc_mrcy_TaxCutsAndJobsActOf2017FederalStatutoryRateBlendedRateForYearsSubsequentToNextFiscalYear_098596C44A9B48DE0DB01933EC6DBC13" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_TaxCutsAndJobsActOf2017ChangeInTaxRateDeferredTaxAssetIncomeTaxExpenseBenefit" xlink:label="loc_mrcy_TaxCutsAndJobsActOf2017ChangeInTaxRateDeferredTaxAssetIncomeTaxExpenseBenefit_68736B4A82DCA5746CD21933EC6D9BD8" xlink:type="locator" />
    <link: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_IncomeTaxDisclosureAbstract_B0CB59DFF0ECE7EDDCC81933EC6D893F" xlink:to="loc_mrcy_TaxCutsAndJobsActOf2017ChangeInTaxRateDeferredTaxAssetIncomeTaxExpenseBenefit_68736B4A82DCA5746CD21933EC6D9BD8" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_TaxCutsAndJobsActOf2017IncompleteAccountingTransitionTaxForAccumulatedForeignEarningsProvisionalIncomeTaxExpenseBenefit" xlink:label="loc_mrcy_TaxCutsAndJobsActOf2017IncompleteAccountingTransitionTaxForAccumulatedForeignEarningsProvisionalIncomeTaxExpenseBenefit_1E5D3515E42B406F8F481933EC6D258F" xlink:type="locator" />
    <link: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_IncomeTaxDisclosureAbstract_B0CB59DFF0ECE7EDDCC81933EC6D893F" xlink:to="loc_mrcy_TaxCutsAndJobsActOf2017IncompleteAccountingTransitionTaxForAccumulatedForeignEarningsProvisionalIncomeTaxExpenseBenefit_1E5D3515E42B406F8F481933EC6D258F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_A8487D64892BC005A5871933EC6D72B3" xlink:type="locator" />
    <link: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_IncomeTaxDisclosureAbstract_B0CB59DFF0ECE7EDDCC81933EC6D893F" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_A8487D64892BC005A5871933EC6D72B3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_B858E8C1B947B28C8A8E1933EC6D20EA" xlink:type="locator" />
    <link: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_IncomeTaxDisclosureAbstract_B0CB59DFF0ECE7EDDCC81933EC6D893F" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_B858E8C1B947B28C8A8E1933EC6D20EA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities" xlink:label="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities_6F3680F8F78303CD99D91933EC6D12DD" xlink:type="locator" />
    <link: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_IncomeTaxDisclosureAbstract_B0CB59DFF0ECE7EDDCC81933EC6D893F" xlink:to="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities_6F3680F8F78303CD99D91933EC6D12DD" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_OperatingLossCarryforwardIncreaseInCarryingValue" xlink:label="loc_mrcy_OperatingLossCarryforwardIncreaseInCarryingValue_5BCD5F6A37348379148F1933EC6D13A6" xlink:type="locator" />
    <link: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_IncomeTaxDisclosureAbstract_B0CB59DFF0ECE7EDDCC81933EC6D893F" xlink:to="loc_mrcy_OperatingLossCarryforwardIncreaseInCarryingValue_5BCD5F6A37348379148F1933EC6D13A6" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/Inventory" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InventoryDisclosureAbstract" xlink:label="loc_us-gaap_InventoryDisclosureAbstract_8D68D432BED023F8FA8C7C3AF657397A" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InventoryDisclosureTextBlock" xlink:label="loc_us-gaap_InventoryDisclosureTextBlock_71403D9F389919EB09B97C3AF65756C5" xlink:type="locator" />
    <link: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_8D68D432BED023F8FA8C7C3AF657397A" xlink:to="loc_us-gaap_InventoryDisclosureTextBlock_71403D9F389919EB09B97C3AF65756C5" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/InventoryAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InventoryDisclosureAbstract" xlink:label="loc_us-gaap_InventoryDisclosureAbstract_5193D61103312E334F4B7C3AF6A7A884" xlink:type="locator" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_ScheduleOfInventoryTable" xlink:label="loc_mrcy_ScheduleOfInventoryTable_A148CEEAE9459572BCB27C3AF6A74201" xlink:type="locator" />
    <link: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_5193D61103312E334F4B7C3AF6A7A884" xlink:to="loc_mrcy_ScheduleOfInventoryTable_A148CEEAE9459572BCB27C3AF6A74201" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProductOrServiceAxis" xlink:label="loc_us-gaap_ProductOrServiceAxis_F641FFBB59F753A663BF7C3AF6A76E3A" xlink:type="locator" />
    <link: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_A148CEEAE9459572BCB27C3AF6A74201" xlink:to="loc_us-gaap_ProductOrServiceAxis_F641FFBB59F753A663BF7C3AF6A76E3A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProductsAndServicesDomain" xlink:label="loc_us-gaap_ProductsAndServicesDomain_7279A07AB958F216B0C77C3AF6A71AD6" xlink:type="locator" />
    <link: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_F641FFBB59F753A663BF7C3AF6A76E3A" xlink:to="loc_us-gaap_ProductsAndServicesDomain_7279A07AB958F216B0C77C3AF6A71AD6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProductMember" xlink:label="loc_us-gaap_ProductMember_D1CA8449914FA1216CB37C3AF6A7B535" xlink:type="locator" />
    <link: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_7279A07AB958F216B0C77C3AF6A71AD6" xlink:to="loc_us-gaap_ProductMember_D1CA8449914FA1216CB37C3AF6A7B535" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_ScheduleOfInventoryLineItems" xlink:label="loc_mrcy_ScheduleOfInventoryLineItems_0FC4F2B0A451B4E617C67C3AF6A7E0C8" xlink:type="locator" />
    <link: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_A148CEEAE9459572BCB27C3AF6A74201" xlink:to="loc_mrcy_ScheduleOfInventoryLineItems_0FC4F2B0A451B4E617C67C3AF6A7E0C8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InventoryForLongTermContractsOrPrograms" xlink:label="loc_us-gaap_InventoryForLongTermContractsOrPrograms_362E56723FA848B1622C7C3AF6A70C76" xlink:type="locator" />
    <link: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_0FC4F2B0A451B4E617C67C3AF6A7E0C8" xlink:to="loc_us-gaap_InventoryForLongTermContractsOrPrograms_362E56723FA848B1622C7C3AF6A70C76" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingCycle" xlink:label="loc_us-gaap_OperatingCycle_A84AD6B669520B0BA2F67C3AF6A70191" xlink:type="locator" />
    <link: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_0FC4F2B0A451B4E617C67C3AF6A7E0C8" xlink:to="loc_us-gaap_OperatingCycle_A84AD6B669520B0BA2F67C3AF6A70191" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/InventoryDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InventoryDisclosureAbstract" xlink:label="loc_us-gaap_InventoryDisclosureAbstract_344D98D68D6B656681F77C3AF7016550" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InventoryRawMaterialsNetOfReserves" xlink:label="loc_us-gaap_InventoryRawMaterialsNetOfReserves_0F032C443C3F9C0C43437C3AF70108D3" xlink:type="locator" />
    <link: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_344D98D68D6B656681F77C3AF7016550" xlink:to="loc_us-gaap_InventoryRawMaterialsNetOfReserves_0F032C443C3F9C0C43437C3AF70108D3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InventoryWorkInProcessNetOfReserves" xlink:label="loc_us-gaap_InventoryWorkInProcessNetOfReserves_F7417743C172D359196A7C3AF7011244" xlink:type="locator" />
    <link: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_344D98D68D6B656681F77C3AF7016550" xlink:to="loc_us-gaap_InventoryWorkInProcessNetOfReserves_F7417743C172D359196A7C3AF7011244" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InventoryFinishedGoodsNetOfReserves" xlink:label="loc_us-gaap_InventoryFinishedGoodsNetOfReserves_3E71ECFD434A282653CA7C3AF701E7A7" xlink:type="locator" />
    <link: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_344D98D68D6B656681F77C3AF7016550" xlink:to="loc_us-gaap_InventoryFinishedGoodsNetOfReserves_3E71ECFD434A282653CA7C3AF701E7A7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InventoryNet" xlink:label="loc_us-gaap_InventoryNet_6914655DB81CCD0A5FE47C3AF70103E8" xlink:type="locator" />
    <link: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_344D98D68D6B656681F77C3AF7016550" xlink:to="loc_us-gaap_InventoryNet_6914655DB81CCD0A5FE47C3AF70103E8" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/InventoryTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InventoryDisclosureAbstract" xlink:label="loc_us-gaap_InventoryDisclosureAbstract_1201CD7EDB0DBBBFC2647C3AF701CCC5" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfInventoryCurrentTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfInventoryCurrentTableTextBlock_68A54D15D61480AA96217C3AF7019D8E" xlink:type="locator" />
    <link: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_1201CD7EDB0DBBBFC2647C3AF701CCC5" xlink:to="loc_us-gaap_ScheduleOfInventoryCurrentTableTextBlock_68A54D15D61480AA96217C3AF7019D8E" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/OperatingSegmentGeographicInformationAndSignificantCustomers" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_F19AD4AA79EE4FCA60847C3AF69D4F92" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentReportingDisclosureTextBlock" xlink:label="loc_us-gaap_SegmentReportingDisclosureTextBlock_38ACC33F8C6690BB884C7C3AF69DA2ED" xlink:type="locator" />
    <link: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_F19AD4AA79EE4FCA60847C3AF69D4F92" xlink:to="loc_us-gaap_SegmentReportingDisclosureTextBlock_38ACC33F8C6690BB884C7C3AF69DA2ED" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/OperatingSegmentGeographicInformationAndSignificantCustomersCustomersComprisingTenPercentOrMoreRevenuesDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_5C818A7DEBC3BCF1A3342737C16B5D39" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable" xlink:label="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_E3B8BBCEBDFB7F0E58252737C16B2F2E" xlink:type="locator" />
    <link: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_5C818A7DEBC3BCF1A3342737C16B5D39" xlink:to="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_E3B8BBCEBDFB7F0E58252737C16B2F2E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ConcentrationRiskByTypeAxis" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_3192B80D6C9C2E4513AD2737C16B02E8" xlink:type="locator" />
    <link: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_E3B8BBCEBDFB7F0E58252737C16B2F2E" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_3192B80D6C9C2E4513AD2737C16B02E8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_E0006C0D7D6D8BE5DEF22737C16B3952" xlink:type="locator" />
    <link: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_3192B80D6C9C2E4513AD2737C16B02E8" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_E0006C0D7D6D8BE5DEF22737C16B3952" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CustomerConcentrationRiskMember" xlink:label="loc_us-gaap_CustomerConcentrationRiskMember_5C826D2346AA1F0A7B632737C16B18DF" xlink:type="locator" />
    <link: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_E0006C0D7D6D8BE5DEF22737C16B3952" xlink:to="loc_us-gaap_CustomerConcentrationRiskMember_5C826D2346AA1F0A7B632737C16B18DF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_54F370B2113BB8A17FD62737C16B1EEA" xlink:type="locator" />
    <link: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_E3B8BBCEBDFB7F0E58252737C16B2F2E" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_54F370B2113BB8A17FD62737C16B1EEA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ConcentrationRiskBenchmarkDomain" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_FC2091A45076742FA90A2737C16B62C3" xlink:type="locator" />
    <link: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_54F370B2113BB8A17FD62737C16B1EEA" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_FC2091A45076742FA90A2737C16B62C3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SalesRevenueNetMember" xlink:label="loc_us-gaap_SalesRevenueNetMember_11F8013FF4DE310473012737C16BC15D" xlink:type="locator" />
    <link: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_FC2091A45076742FA90A2737C16B62C3" xlink:to="loc_us-gaap_SalesRevenueNetMember_11F8013FF4DE310473012737C16BC15D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MajorCustomersAxis" xlink:label="loc_us-gaap_MajorCustomersAxis_4A428796D89F7CCC1E092737C16B7E5E" xlink:type="locator" />
    <link: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_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_E3B8BBCEBDFB7F0E58252737C16B2F2E" xlink:to="loc_us-gaap_MajorCustomersAxis_4A428796D89F7CCC1E092737C16B7E5E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NameOfMajorCustomerDomain" xlink:label="loc_us-gaap_NameOfMajorCustomerDomain_709B52C4C2C86B34A9DE2737C16BEDDA" xlink:type="locator" />
    <link: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_4A428796D89F7CCC1E092737C16B7E5E" xlink:to="loc_us-gaap_NameOfMajorCustomerDomain_709B52C4C2C86B34A9DE2737C16BEDDA" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_RaytheonCompanyMember" xlink:label="loc_mrcy_RaytheonCompanyMember_B6FC258B8E527E59AFE62737C16BBDA4" xlink:type="locator" />
    <link: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_709B52C4C2C86B34A9DE2737C16BEDDA" xlink:to="loc_mrcy_RaytheonCompanyMember_B6FC258B8E527E59AFE62737C16BBDA4" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_LockheedMartinCorporationMember" xlink:label="loc_mrcy_LockheedMartinCorporationMember_248E8767BBE8873DB8B327383E5AED92" xlink:type="locator" />
    <link: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_709B52C4C2C86B34A9DE2737C16BEDDA" xlink:to="loc_mrcy_LockheedMartinCorporationMember_248E8767BBE8873DB8B327383E5AED92" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_NorthropGrummanCorporationMember" xlink:label="loc_mrcy_NorthropGrummanCorporationMember_0D83ADB6A0ED52B2CCC22737C16B913B" xlink:type="locator" />
    <link: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_709B52C4C2C86B34A9DE2737C16BEDDA" xlink:to="loc_mrcy_NorthropGrummanCorporationMember_0D83ADB6A0ED52B2CCC22737C16B913B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EntityWideRevenueMajorCustomerLineItems" xlink:label="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_B94414F7E3D2B9FBA8092737C16B2730" xlink:type="locator" />
    <link: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_E3B8BBCEBDFB7F0E58252737C16B2F2E" xlink:to="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_B94414F7E3D2B9FBA8092737C16B2730" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ConcentrationRiskPercentage1" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_0DE70AFA028D587F64882737C16BBD2E" xlink:type="locator" />
    <link: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_B94414F7E3D2B9FBA8092737C16B2730" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_0DE70AFA028D587F64882737C16BBD2E" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/OperatingSegmentGeographicInformationAndSignificantCustomersGeographicDistributionOfRevenuesAndLongLivedAssetsFromContinuingOperationsDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_067699EE2584DCB1A72F7C3AF693F5C3" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NumberOfOperatingSegments" xlink:label="loc_us-gaap_NumberOfOperatingSegments_4986FBFC5221E126991A7C3AF6932A5A" xlink:type="locator" />
    <link: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_067699EE2584DCB1A72F7C3AF693F5C3" xlink:to="loc_us-gaap_NumberOfOperatingSegments_4986FBFC5221E126991A7C3AF6932A5A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable" xlink:label="loc_us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable_3514AC5E77249AA6E62E7C3AF693A4D5" xlink:type="locator" />
    <link: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_067699EE2584DCB1A72F7C3AF693F5C3" xlink:to="loc_us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable_3514AC5E77249AA6E62E7C3AF693A4D5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ConsolidationItemsAxis" xlink:label="loc_us-gaap_ConsolidationItemsAxis_72412BFAB73A79CC04EF7C3AF6931DEB" xlink:type="locator" />
    <link: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_3514AC5E77249AA6E62E7C3AF693A4D5" xlink:to="loc_us-gaap_ConsolidationItemsAxis_72412BFAB73A79CC04EF7C3AF6931DEB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ConsolidationItemsDomain" xlink:label="loc_us-gaap_ConsolidationItemsDomain_3622082246CD7CAFD5117C3AF69380BA" xlink:type="locator" />
    <link: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_72412BFAB73A79CC04EF7C3AF6931DEB" xlink:to="loc_us-gaap_ConsolidationItemsDomain_3622082246CD7CAFD5117C3AF69380BA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ReportableGeographicalComponentsMember" xlink:label="loc_us-gaap_ReportableGeographicalComponentsMember_E12BB8CC385A1D6DBA9D7C3AF6933962" xlink:type="locator" />
    <link: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_3622082246CD7CAFD5117C3AF69380BA" xlink:to="loc_us-gaap_ReportableGeographicalComponentsMember_E12BB8CC385A1D6DBA9D7C3AF6933962" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GeographyEliminationsMember" xlink:label="loc_us-gaap_GeographyEliminationsMember_6ECD2F1F1AEE2BAA328C7C3AF6935B99" xlink:type="locator" />
    <link: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_3622082246CD7CAFD5117C3AF69380BA" xlink:to="loc_us-gaap_GeographyEliminationsMember_6ECD2F1F1AEE2BAA328C7C3AF6935B99" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementGeographicalAxis" xlink:label="loc_us-gaap_StatementGeographicalAxis_BE880372D50FA9A768DA7C3AF693C363" xlink:type="locator" />
    <link: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_3514AC5E77249AA6E62E7C3AF693A4D5" xlink:to="loc_us-gaap_StatementGeographicalAxis_BE880372D50FA9A768DA7C3AF693C363" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_EB1F04475DD9DE59EE6A7C3AF69335FF" xlink:type="locator" />
    <link: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_BE880372D50FA9A768DA7C3AF693C363" xlink:to="loc_us-gaap_SegmentGeographicalDomain_EB1F04475DD9DE59EE6A7C3AF69335FF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/country/2016/country-2016-01-31.xsd#country_US" xlink:label="loc_country_US_354478A5A5F3247B3D197C3AF6939555" xlink:type="locator" />
    <link: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_EB1F04475DD9DE59EE6A7C3AF69335FF" xlink:to="loc_country_US_354478A5A5F3247B3D197C3AF6939555" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EuropeMember" xlink:label="loc_us-gaap_EuropeMember_7D40427E34EB293E8C507C3AF6931C1A" xlink:type="locator" />
    <link: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_EB1F04475DD9DE59EE6A7C3AF69335FF" xlink:to="loc_us-gaap_EuropeMember_7D40427E34EB293E8C507C3AF6931C1A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AsiaPacificMember" xlink:label="loc_us-gaap_AsiaPacificMember_8DAC8B31BAFCBB3ECB2F7C3AF693D423" xlink:type="locator" />
    <link: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_EB1F04475DD9DE59EE6A7C3AF69335FF" xlink:to="loc_us-gaap_AsiaPacificMember_8DAC8B31BAFCBB3ECB2F7C3AF693D423" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GeographicDistributionAxis" xlink:label="loc_us-gaap_GeographicDistributionAxis_56340C045E652643D9BA7C3AF693CE0B" xlink:type="locator" />
    <link: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_ReconciliationOfRevenueFromSegmentsToConsolidatedTable_3514AC5E77249AA6E62E7C3AF693A4D5" xlink:to="loc_us-gaap_GeographicDistributionAxis_56340C045E652643D9BA7C3AF693CE0B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GeographicDistributionDomain" xlink:label="loc_us-gaap_GeographicDistributionDomain_7748568F2A126D4997777C3AF693A3BC" xlink:type="locator" />
    <link: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_GeographicDistributionAxis_56340C045E652643D9BA7C3AF693CE0B" xlink:to="loc_us-gaap_GeographicDistributionDomain_7748568F2A126D4997777C3AF693A3BC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GeographicDistributionDomesticMember" xlink:label="loc_us-gaap_GeographicDistributionDomesticMember_EA475D744E06B41DFB197C3AF6939381" xlink:type="locator" />
    <link: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_GeographicDistributionDomain_7748568F2A126D4997777C3AF693A3BC" xlink:to="loc_us-gaap_GeographicDistributionDomesticMember_EA475D744E06B41DFB197C3AF6939381" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GeographicDistributionForeignMember" xlink:label="loc_us-gaap_GeographicDistributionForeignMember_5704C094B0D1AF04A7F07C3AF69D2B7D" xlink:type="locator" />
    <link: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_GeographicDistributionDomain_7748568F2A126D4997777C3AF693A3BC" xlink:to="loc_us-gaap_GeographicDistributionForeignMember_5704C094B0D1AF04A7F07C3AF69D2B7D" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_EndApplicationAxis" xlink:label="loc_mrcy_EndApplicationAxis_15841B6D4F055BC477F27C3AF69D17C2" xlink:type="locator" />
    <link: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_ReconciliationOfRevenueFromSegmentsToConsolidatedTable_3514AC5E77249AA6E62E7C3AF693A4D5" xlink:to="loc_mrcy_EndApplicationAxis_15841B6D4F055BC477F27C3AF69D17C2" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_EndApplicationsDomain" xlink:label="loc_mrcy_EndApplicationsDomain_242038FCA0B53BB472727C3AF69D1E74" xlink:type="locator" />
    <link: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_EndApplicationAxis_15841B6D4F055BC477F27C3AF69D17C2" xlink:to="loc_mrcy_EndApplicationsDomain_242038FCA0B53BB472727C3AF69D1E74" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_TotalSensorAndEffectorApplicationsMember" xlink:label="loc_mrcy_TotalSensorAndEffectorApplicationsMember_91F11B2CB0253328833B7C3AF69D5322" xlink:type="locator" />
    <link: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_EndApplicationsDomain_242038FCA0B53BB472727C3AF69D1E74" xlink:to="loc_mrcy_TotalSensorAndEffectorApplicationsMember_91F11B2CB0253328833B7C3AF69D5322" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_RadarMember" xlink:label="loc_mrcy_RadarMember_DA0AE6C2BE215992A8427C3AF69D6C5B" xlink:type="locator" />
    <link: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_TotalSensorAndEffectorApplicationsMember_91F11B2CB0253328833B7C3AF69D5322" xlink:to="loc_mrcy_RadarMember_DA0AE6C2BE215992A8427C3AF69D6C5B" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_ElectronicWarfareMember" xlink:label="loc_mrcy_ElectronicWarfareMember_792DB1EF0E61B9203F927C3AF69D9CE9" xlink:type="locator" />
    <link: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_TotalSensorAndEffectorApplicationsMember_91F11B2CB0253328833B7C3AF69D5322" xlink:to="loc_mrcy_ElectronicWarfareMember_792DB1EF0E61B9203F927C3AF69D9CE9" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_OtherSensorAndEffectorApplicationsMember" xlink:label="loc_mrcy_OtherSensorAndEffectorApplicationsMember_D02E521E0AEA1C9131C37C3AF69D176D" xlink:type="locator" />
    <link: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_TotalSensorAndEffectorApplicationsMember_91F11B2CB0253328833B7C3AF69D5322" xlink:to="loc_mrcy_OtherSensorAndEffectorApplicationsMember_D02E521E0AEA1C9131C37C3AF69D176D" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_C4IApplicationsMember" xlink:label="loc_mrcy_C4IApplicationsMember_5468D45276773FE2309B7C3AF69DBF97" xlink:type="locator" />
    <link: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_EndApplicationsDomain_242038FCA0B53BB472727C3AF69D1E74" xlink:to="loc_mrcy_C4IApplicationsMember_5468D45276773FE2309B7C3AF69DBF97" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_OtherEndApplicationsMember" xlink:label="loc_mrcy_OtherEndApplicationsMember_E5359514F2927EF816CC7C3AF69D46D5" xlink:type="locator" />
    <link: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_EndApplicationsDomain_242038FCA0B53BB472727C3AF69D1E74" xlink:to="loc_mrcy_OtherEndApplicationsMember_E5359514F2927EF816CC7C3AF69D46D5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProductOrServiceAxis" xlink:label="loc_us-gaap_ProductOrServiceAxis_E4E0782B958F299617907C3AF69DFB00" xlink:type="locator" />
    <link: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_ReconciliationOfRevenueFromSegmentsToConsolidatedTable_3514AC5E77249AA6E62E7C3AF693A4D5" xlink:to="loc_us-gaap_ProductOrServiceAxis_E4E0782B958F299617907C3AF69DFB00" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProductsAndServicesDomain" xlink:label="loc_us-gaap_ProductsAndServicesDomain_A05CF926DCCFCA8B54687C3AF69D84AB" xlink:type="locator" />
    <link: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_E4E0782B958F299617907C3AF69DFB00" xlink:to="loc_us-gaap_ProductsAndServicesDomain_A05CF926DCCFCA8B54687C3AF69D84AB" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_ComponentsMember" xlink:label="loc_mrcy_ComponentsMember_D205813FDB85DD14FE1C7C3AF69D8A92" xlink:type="locator" />
    <link: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_A05CF926DCCFCA8B54687C3AF69D84AB" xlink:to="loc_mrcy_ComponentsMember_D205813FDB85DD14FE1C7C3AF69D8A92" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_ModulesandSubassembliesMember" xlink:label="loc_mrcy_ModulesandSubassembliesMember_938B98C41FAE6B7C2AFD7C3AF69D6EC6" xlink:type="locator" />
    <link: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_A05CF926DCCFCA8B54687C3AF69D84AB" xlink:to="loc_mrcy_ModulesandSubassembliesMember_938B98C41FAE6B7C2AFD7C3AF69D6EC6" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_IntegratedSubsystemsMember" xlink:label="loc_mrcy_IntegratedSubsystemsMember_E118DF3BDCCDBBF6CCED7C3AF69D3570" xlink:type="locator" />
    <link: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_A05CF926DCCFCA8B54687C3AF69D84AB" xlink:to="loc_mrcy_IntegratedSubsystemsMember_E118DF3BDCCDBBF6CCED7C3AF69D3570" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentReportingRevenueReconcilingItemLineItems" xlink:label="loc_us-gaap_SegmentReportingRevenueReconcilingItemLineItems_93074037AB98874C26C27C3AF69D6988" xlink:type="locator" />
    <link: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_ReconciliationOfRevenueFromSegmentsToConsolidatedTable_3514AC5E77249AA6E62E7C3AF693A4D5" xlink:to="loc_us-gaap_SegmentReportingRevenueReconcilingItemLineItems_93074037AB98874C26C27C3AF69D6988" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues_F9DB4F1DD130A79933777C3AF69D60EF" xlink:type="locator" />
    <link: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_SegmentReportingRevenueReconcilingItemLineItems_93074037AB98874C26C27C3AF69D6988" xlink:to="loc_us-gaap_Revenues_F9DB4F1DD130A79933777C3AF69D60EF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NoncurrentAssets" xlink:label="loc_us-gaap_NoncurrentAssets_EF3DD2456165725D38A27C3AF69D6F3E" xlink:type="locator" />
    <link: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_93074037AB98874C26C27C3AF69D6988" xlink:to="loc_us-gaap_NoncurrentAssets_EF3DD2456165725D38A27C3AF69D6F3E" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/OperatingSegmentGeographicInformationAndSignificantCustomersProgramsComprisingTenPercentOrMoreOfCompanysRevenueDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_698681ED065AC7D35B611933EC448E42" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_6BE9D1114AF355A916BC1933EC440A57" xlink:type="locator" />
    <link: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_698681ED065AC7D35B611933EC448E42" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_6BE9D1114AF355A916BC1933EC440A57" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_C7E068013BFFCA7C8D151933EC45CC89" xlink:type="locator" />
    <link: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_6BE9D1114AF355A916BC1933EC440A57" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_C7E068013BFFCA7C8D151933EC45CC89" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ConcentrationRiskBenchmarkDomain" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_09A855162BE4211D35591933EC455EE7" xlink:type="locator" />
    <link: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_C7E068013BFFCA7C8D151933EC45CC89" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_09A855162BE4211D35591933EC455EE7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SalesRevenueNetMember" xlink:label="loc_us-gaap_SalesRevenueNetMember_56565ACCDE1E5368E9521933EC45AB9A" xlink:type="locator" />
    <link: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_09A855162BE4211D35591933EC455EE7" xlink:to="loc_us-gaap_SalesRevenueNetMember_56565ACCDE1E5368E9521933EC45AB9A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ConcentrationRiskByTypeAxis" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_2DFEB6B0B231A91E99DA1933EC45D7DA" xlink:type="locator" />
    <link: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_6BE9D1114AF355A916BC1933EC440A57" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_2DFEB6B0B231A91E99DA1933EC45D7DA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_EEFD3CF2E54C4E91D0661933EC45A43F" xlink:type="locator" />
    <link: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_2DFEB6B0B231A91E99DA1933EC45D7DA" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_EEFD3CF2E54C4E91D0661933EC45A43F" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_ProgramConcentrationRiskMember" xlink:label="loc_mrcy_ProgramConcentrationRiskMember_DB75FBC635CC33565DDD1933EC4515CA" xlink:type="locator" />
    <link: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_EEFD3CF2E54C4E91D0661933EC45A43F" xlink:to="loc_mrcy_ProgramConcentrationRiskMember_DB75FBC635CC33565DDD1933EC4515CA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProductOrServiceAxis" xlink:label="loc_us-gaap_ProductOrServiceAxis_B2D4F72431C8E7FB1C331933EC45882C" xlink:type="locator" />
    <link: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_6BE9D1114AF355A916BC1933EC440A57" xlink:to="loc_us-gaap_ProductOrServiceAxis_B2D4F72431C8E7FB1C331933EC45882C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProductsAndServicesDomain" xlink:label="loc_us-gaap_ProductsAndServicesDomain_476725D4A490682ECA221933EC45A7AB" xlink:type="locator" />
    <link: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_B2D4F72431C8E7FB1C331933EC45882C" xlink:to="loc_us-gaap_ProductsAndServicesDomain_476725D4A490682ECA221933EC45A7AB" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_SEWIPProgramMember" xlink:label="loc_mrcy_SEWIPProgramMember_388611FCB983B3B30DAC196921727F5A" xlink:type="locator" />
    <link: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_476725D4A490682ECA221933EC45A7AB" xlink:to="loc_mrcy_SEWIPProgramMember_388611FCB983B3B30DAC196921727F5A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_236ADDCB7178A4FF02931933EC474C94" xlink:type="locator" />
    <link: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_ScheduleOfSegmentReportingInformationBySegmentTable_6BE9D1114AF355A916BC1933EC440A57" xlink:to="loc_us-gaap_SegmentReportingInformationLineItems_236ADDCB7178A4FF02931933EC474C94" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ConcentrationRiskPercentage1" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_2A102B898020CB780CAC1933EC474277" xlink:type="locator" />
    <link: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_236ADDCB7178A4FF02931933EC474C94" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_2A102B898020CB780CAC1933EC474277" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/OperatingSegmentGeographicInformationAndSignificantCustomersTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_D01D706860ED0F044A677C3AF69DEE89" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock_E20C31274C856C82F1987C3AF69D0286" xlink:type="locator" />
    <link: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_D01D706860ED0F044A677C3AF69DEE89" xlink:to="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock_E20C31274C856C82F1987C3AF69D0286" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfRevenueByMajorCustomersByReportingSegmentsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfRevenueByMajorCustomersByReportingSegmentsTableTextBlock_3ACEEC81F9A09E2AA8C17C3AF69DB5B3" xlink:type="locator" />
    <link: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_D01D706860ED0F044A677C3AF69DEE89" xlink:to="loc_us-gaap_ScheduleOfRevenueByMajorCustomersByReportingSegmentsTableTextBlock_3ACEEC81F9A09E2AA8C17C3AF69DB5B3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SchedulesOfConcentrationOfRiskByRiskFactorTextBlock" xlink:label="loc_us-gaap_SchedulesOfConcentrationOfRiskByRiskFactorTextBlock_EDC583FEFF80A03333E27C3AF69D34DE" xlink:type="locator" />
    <link: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_SegmentReportingAbstract_D01D706860ED0F044A677C3AF69DEE89" xlink:to="loc_us-gaap_SchedulesOfConcentrationOfRiskByRiskFactorTextBlock_EDC583FEFF80A03333E27C3AF69D34DE" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/Restructuring" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RestructuringAndRelatedActivitiesAbstract" xlink:label="loc_us-gaap_RestructuringAndRelatedActivitiesAbstract_82B0D300C230F0D3F95C7C3AF661F869" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock" xlink:label="loc_us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock_F4985BD7883F83B85C267C3AF6618A22" xlink:type="locator" />
    <link: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_82B0D300C230F0D3F95C7C3AF661F869" xlink:to="loc_us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock_F4985BD7883F83B85C267C3AF6618A22" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/RestructuringAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherIncomeAndExpensesAbstract" xlink:label="loc_us-gaap_OtherIncomeAndExpensesAbstract_EEE2F575630133B763D07C3AF6EDCEFE" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RestructuringCharges" xlink:label="loc_us-gaap_RestructuringCharges_2CBF038D1F6679E06C557C3AF6EDDA9A" xlink:type="locator" />
    <link:presentationArc order="1" 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_OtherIncomeAndExpensesAbstract_EEE2F575630133B763D07C3AF6EDCEFE" xlink:to="loc_us-gaap_RestructuringCharges_2CBF038D1F6679E06C557C3AF6EDDA9A" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/RestructuringExpensesByReportableSegmentForRestructuringPlansDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherIncomeAndExpensesAbstract" xlink:label="loc_us-gaap_OtherIncomeAndExpensesAbstract_80CD9ADAB1F94F7841121933ECE5174B" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_DA6962E69FD2F6292E441933ECE5C0F0" xlink:type="locator" />
    <link: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_80CD9ADAB1F94F7841121933ECE5174B" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_DA6962E69FD2F6292E441933ECE5C0F0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RestructuringCostAndReserveAxis" xlink:label="loc_us-gaap_RestructuringCostAndReserveAxis_B899F767E6D0006654FC1933ECE5A98B" xlink:type="locator" />
    <link: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_DA6962E69FD2F6292E441933ECE5C0F0" xlink:to="loc_us-gaap_RestructuringCostAndReserveAxis_B899F767E6D0006654FC1933ECE5A98B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_TypeOfRestructuringDomain" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_89FAF5721344F9A52DA81933ECE5064A" xlink:type="locator" />
    <link: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_B899F767E6D0006654FC1933ECE5A98B" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_89FAF5721344F9A52DA81933ECE5064A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EmployeeSeveranceMember" xlink:label="loc_us-gaap_EmployeeSeveranceMember_8234A85DCECB557E85B31933ECE54D04" xlink:type="locator" />
    <link: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_89FAF5721344F9A52DA81933ECE5064A" xlink:to="loc_us-gaap_EmployeeSeveranceMember_8234A85DCECB557E85B31933ECE54D04" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FacilityClosingMember" xlink:label="loc_us-gaap_FacilityClosingMember_2A38B2831613B6A7EE9C1933ECE58E51" xlink:type="locator" />
    <link: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_89FAF5721344F9A52DA81933ECE5064A" xlink:to="loc_us-gaap_FacilityClosingMember_2A38B2831613B6A7EE9C1933ECE58E51" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RestructuringCostAndReserveLineItems" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_08E6565C8A79C14241431933ECE58A00" xlink:type="locator" />
    <link: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_ScheduleOfRestructuringAndRelatedCostsTable_DA6962E69FD2F6292E441933ECE5C0F0" xlink:to="loc_us-gaap_RestructuringCostAndReserveLineItems_08E6565C8A79C14241431933ECE58A00" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RestructuringReserveRollForward" xlink:label="loc_us-gaap_RestructuringReserveRollForward_6BF7A8FE6DA3D2FE24431933ECE58157" xlink:type="locator" />
    <link: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_08E6565C8A79C14241431933ECE58A00" xlink:to="loc_us-gaap_RestructuringReserveRollForward_6BF7A8FE6DA3D2FE24431933ECE58157" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RestructuringReserveCurrent" xlink:label="loc_us-gaap_RestructuringReserveCurrent_8FE2B130A022E6E97D841933ECE51755" xlink:type="locator" />
    <link: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_6BF7A8FE6DA3D2FE24431933ECE58157" xlink:to="loc_us-gaap_RestructuringReserveCurrent_8FE2B130A022E6E97D841933ECE51755" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RestructuringSettlementAndImpairmentProvisions" xlink:label="loc_us-gaap_RestructuringSettlementAndImpairmentProvisions_12117103D569CA84DE1F1933ECE5CE84" xlink:type="locator" />
    <link: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_6BF7A8FE6DA3D2FE24431933ECE58157" xlink:to="loc_us-gaap_RestructuringSettlementAndImpairmentProvisions_12117103D569CA84DE1F1933ECE5CE84" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsForRestructuring" xlink:label="loc_us-gaap_PaymentsForRestructuring_86AE140EF797D9ADC35A1933ECE5C1C5" xlink:type="locator" />
    <link: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_6BF7A8FE6DA3D2FE24431933ECE58157" xlink:to="loc_us-gaap_PaymentsForRestructuring_86AE140EF797D9ADC35A1933ECE5C1C5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RestructuringReserveCurrent" xlink:label="loc_us-gaap_RestructuringReserveCurrent_2A355162551A0A78F09A1933ECE5F800" xlink:type="locator" />
    <link:presentationArc order="4" 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_6BF7A8FE6DA3D2FE24431933ECE58157" xlink:to="loc_us-gaap_RestructuringReserveCurrent_2A355162551A0A78F09A1933ECE5F800" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/RestructuringTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RestructuringAndRelatedActivitiesAbstract" xlink:label="loc_us-gaap_RestructuringAndRelatedActivitiesAbstract_DB12B8B64BA8513C9D3F7C3AF6E37002" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfRestructuringReserveByTypeOfCostTextBlock" xlink:label="loc_us-gaap_ScheduleOfRestructuringReserveByTypeOfCostTextBlock_A5F711A301D2F96DD25F7C3AF6E37F39" xlink:type="locator" />
    <link: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_DB12B8B64BA8513C9D3F7C3AF6E37002" xlink:to="loc_us-gaap_ScheduleOfRestructuringReserveByTypeOfCostTextBlock_A5F711A301D2F96DD25F7C3AF6E37F39" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/StockBasedCompensation" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_58E3A97DE082105966127C3AF6E3B70D" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_B17F79CD7E7393D3D4427C3AF6E3D1AF" xlink:type="locator" />
    <link: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_58E3A97DE082105966127C3AF6E3B70D" xlink:to="loc_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_B17F79CD7E7393D3D4427C3AF6E3D1AF" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/StockBasedCompensationAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_92BF137E5C0C7FA800327C3AF6753AEF" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_5DE4FE98A5AB9939B17F7C3AF6753C23" xlink:type="locator" />
    <link: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_92BF137E5C0C7FA800327C3AF6753AEF" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_5DE4FE98A5AB9939B17F7C3AF6753C23" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PlanNameAxis" xlink:label="loc_us-gaap_PlanNameAxis_434A789859BE779CE4B57C3AF675B740" xlink:type="locator" />
    <link: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_5DE4FE98A5AB9939B17F7C3AF6753C23" xlink:to="loc_us-gaap_PlanNameAxis_434A789859BE779CE4B57C3AF675B740" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PlanNameDomain" xlink:label="loc_us-gaap_PlanNameDomain_44080588299D1A57D3E07C3AF675FA29" xlink:type="locator" />
    <link: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_434A789859BE779CE4B57C3AF675B740" xlink:to="loc_us-gaap_PlanNameDomain_44080588299D1A57D3E07C3AF675FA29" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_StockOptionPlanTwentyZeroFiveMember" xlink:label="loc_mrcy_StockOptionPlanTwentyZeroFiveMember_FA15A40B528FFE4B80757C3AF675B0DD" xlink:type="locator" />
    <link: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_44080588299D1A57D3E07C3AF675FA29" xlink:to="loc_mrcy_StockOptionPlanTwentyZeroFiveMember_FA15A40B528FFE4B80757C3AF675B0DD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_3D19BAE20821720054497C3AF67571FF" xlink:type="locator" />
    <link: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_5DE4FE98A5AB9939B17F7C3AF6753C23" xlink:to="loc_us-gaap_RangeAxis_3D19BAE20821720054497C3AF67571FF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_EF20396953C1D6DC62767C3AF6751BA5" xlink:type="locator" />
    <link: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_3D19BAE20821720054497C3AF67571FF" xlink:to="loc_us-gaap_RangeMember_EF20396953C1D6DC62767C3AF6751BA5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_089A5B72269DE9065F287C3AF675DBA5" xlink:type="locator" />
    <link: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_EF20396953C1D6DC62767C3AF6751BA5" xlink:to="loc_us-gaap_MaximumMember_089A5B72269DE9065F287C3AF675DBA5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_B49BFF4DC98BD5FF375A7C3AF675873A" xlink:type="locator" />
    <link: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_5DE4FE98A5AB9939B17F7C3AF6753C23" xlink:to="loc_us-gaap_AwardTypeAxis_B49BFF4DC98BD5FF375A7C3AF675873A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_F4E4F7A54D092CC79EB47C3AF67534C1" xlink:type="locator" />
    <link: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_B49BFF4DC98BD5FF375A7C3AF675873A" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_F4E4F7A54D092CC79EB47C3AF67534C1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EmployeeStockMember" xlink:label="loc_us-gaap_EmployeeStockMember_526B891CF626C01534287C3AF6754BE3" xlink:type="locator" />
    <link: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_F4E4F7A54D092CC79EB47C3AF67534C1" xlink:to="loc_us-gaap_EmployeeStockMember_526B891CF626C01534287C3AF6754BE3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_429F5C33CE0D028D44D47C3AF675AF76" xlink:type="locator" />
    <link: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_5DE4FE98A5AB9939B17F7C3AF6753C23" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_429F5C33CE0D028D44D47C3AF675AF76" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_D5BDEA3357CB44BAB65C7C3AF675B810" xlink:type="locator" />
    <link: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_429F5C33CE0D028D44D47C3AF675AF76" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_D5BDEA3357CB44BAB65C7C3AF675B810" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_MinimumGrantDateFairValueOfNonqualifiedStockOptionsAsPercentageOfFairValueOfCommonStock" xlink:label="loc_mrcy_MinimumGrantDateFairValueOfNonqualifiedStockOptionsAsPercentageOfFairValueOfCommonStock_139AB00B6DBED57B54767C3AF675CD76" xlink:type="locator" />
    <link: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_429F5C33CE0D028D44D47C3AF675AF76" xlink:to="loc_mrcy_MinimumGrantDateFairValueOfNonqualifiedStockOptionsAsPercentageOfFairValueOfCommonStock_139AB00B6DBED57B54767C3AF675CD76" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_ShareBasedCompensationArrangementByShareBasedPaymentAwardContractualLife" xlink:label="loc_mrcy_ShareBasedCompensationArrangementByShareBasedPaymentAwardContractualLife_2398C7F0801488C37F1F7C3AF6751ACF" xlink:type="locator" />
    <link: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_429F5C33CE0D028D44D47C3AF675AF76" xlink:to="loc_mrcy_ShareBasedCompensationArrangementByShareBasedPaymentAwardContractualLife_2398C7F0801488C37F1F7C3AF6751ACF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_C476ADE5BCA0AA7ED78E7C3AF6756E64" xlink:type="locator" />
    <link: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_429F5C33CE0D028D44D47C3AF675AF76" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_C476ADE5BCA0AA7ED78E7C3AF6756E64" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPriceOfferingDate" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPriceOfferingDate_5FED998766BD9FA013A07C3AF675AAB6" xlink:type="locator" />
    <link: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_429F5C33CE0D028D44D47C3AF675AF76" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPriceOfferingDate_5FED998766BD9FA013A07C3AF675AAB6" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_EmployeeStockPurchasePlanMaximumPercentageOfCompensationToPurchaseSharesByEligibleParticipants" xlink:label="loc_mrcy_EmployeeStockPurchasePlanMaximumPercentageOfCompensationToPurchaseSharesByEligibleParticipants_DCC7CEFA614BC660CAAB7C3AF67518E0" xlink:type="locator" />
    <link: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_429F5C33CE0D028D44D47C3AF675AF76" xlink:to="loc_mrcy_EmployeeStockPurchasePlanMaximumPercentageOfCompensationToPurchaseSharesByEligibleParticipants_DCC7CEFA614BC660CAAB7C3AF67518E0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod_0EF7C150896F19D79A647C3AF675CB2C" xlink:type="locator" />
    <link: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_429F5C33CE0D028D44D47C3AF675AF76" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod_0EF7C150896F19D79A647C3AF675CB2C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_1925942A181EB292929F7C3AF6752B8A" xlink:type="locator" />
    <link: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_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_429F5C33CE0D028D44D47C3AF675AF76" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_1925942A181EB292929F7C3AF6752B8A" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/StockBasedCompensationStockBasedCompensationExpensesDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_92DDF8CB5E82EA4F965E7C3AF6D9498C" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_62033FAE81235467F41F7C3AF6D925A1" xlink:type="locator" />
    <link: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_92DDF8CB5E82EA4F965E7C3AF6D9498C" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_62033FAE81235467F41F7C3AF6D925A1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_61298305C7112094D2597C3AF6D9DF4B" xlink:type="locator" />
    <link: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_62033FAE81235467F41F7C3AF6D925A1" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_61298305C7112094D2597C3AF6D9DF4B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_80996CDB1869678049137C3AF6D94C2A" xlink:type="locator" />
    <link: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_61298305C7112094D2597C3AF6D9DF4B" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_80996CDB1869678049137C3AF6D94C2A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CostOfSalesMember" xlink:label="loc_us-gaap_CostOfSalesMember_A6798907FD649A553CCF7C3AF6D99100" xlink:type="locator" />
    <link: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_80996CDB1869678049137C3AF6D94C2A" xlink:to="loc_us-gaap_CostOfSalesMember_A6798907FD649A553CCF7C3AF6D99100" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesMember" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_4B31323D28848D4AD5AF7C3AF6D958A2" xlink:type="locator" />
    <link: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_80996CDB1869678049137C3AF6D94C2A" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_4B31323D28848D4AD5AF7C3AF6D958A2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ResearchAndDevelopmentExpenseMember" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpenseMember_8344F9EC4955D8C93AE97C3AF6D9668D" xlink:type="locator" />
    <link: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_80996CDB1869678049137C3AF6D94C2A" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpenseMember_8344F9EC4955D8C93AE97C3AF6D9668D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7F545F68D42F01F753F27C3AF6D9213C" xlink:type="locator" />
    <link: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_62033FAE81235467F41F7C3AF6D925A1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7F545F68D42F01F753F27C3AF6D9213C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_AB9876F2BDAA5A8BDD9D7C3AF6D99483" xlink:type="locator" />
    <link: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_7F545F68D42F01F753F27C3AF6D9213C" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_AB9876F2BDAA5A8BDD9D7C3AF6D99483" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_0EC277577DE2F8F3102C7C3AF6D9941E" xlink:type="locator" />
    <link: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_7F545F68D42F01F753F27C3AF6D9213C" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_0EC277577DE2F8F3102C7C3AF6D9941E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax_9049B33973065C035A637C3AF6D9C2B1" xlink:type="locator" />
    <link: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_7F545F68D42F01F753F27C3AF6D9213C" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax_9049B33973065C035A637C3AF6D9C2B1" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/StockBasedCompensationSummaryOfNonvestedRestrictedStockDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_7F16FF8E0AB21A23DD907C3AF6BB222E" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_5F0D2B61CCE784F9600D7C3AF6BB577B" xlink:type="locator" />
    <link: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_7F16FF8E0AB21A23DD907C3AF6BB222E" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_5F0D2B61CCE784F9600D7C3AF6BB577B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_7B62767D3B195325DD287C3AF6BB20CA" xlink:type="locator" />
    <link: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_5F0D2B61CCE784F9600D7C3AF6BB577B" xlink:to="loc_us-gaap_AwardTypeAxis_7B62767D3B195325DD287C3AF6BB20CA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_E29BF2376147E33B0F2A7C3AF6BB58F3" xlink:type="locator" />
    <link: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_7B62767D3B195325DD287C3AF6BB20CA" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_E29BF2376147E33B0F2A7C3AF6BB58F3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RestrictedStockMember" xlink:label="loc_us-gaap_RestrictedStockMember_E29E16CB885F816B12F17C3AF6BB8EAA" xlink:type="locator" />
    <link: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_E29BF2376147E33B0F2A7C3AF6BB58F3" xlink:to="loc_us-gaap_RestrictedStockMember_E29E16CB885F816B12F17C3AF6BB8EAA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_F205AF1E55557F7CC0547C3AF6BBDF6C" xlink:type="locator" />
    <link: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_5F0D2B61CCE784F9600D7C3AF6BB577B" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_F205AF1E55557F7CC0547C3AF6BBDF6C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_4645DF4025D5C4A8B4DB7C3AF6BB6780" xlink:type="locator" />
    <link: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_F205AF1E55557F7CC0547C3AF6BBDF6C" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_4645DF4025D5C4A8B4DB7C3AF6BB6780" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_69D735DEA18B2CA4EEE77C3AF6BBF894" xlink:type="locator" />
    <link: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_4645DF4025D5C4A8B4DB7C3AF6BB6780" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_69D735DEA18B2CA4EEE77C3AF6BBF894" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_4BE78188BE73DC7154217C3AF6BB603C" xlink:type="locator" />
    <link: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_4645DF4025D5C4A8B4DB7C3AF6BB6780" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_4BE78188BE73DC7154217C3AF6BB603C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_C3228DB98B37D9A20ADA7C3AF6BBD6BF" xlink:type="locator" />
    <link: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_4645DF4025D5C4A8B4DB7C3AF6BB6780" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_C3228DB98B37D9A20ADA7C3AF6BBD6BF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_40C67D1259673920514E7C3AF6BBC934" xlink:type="locator" />
    <link: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_4645DF4025D5C4A8B4DB7C3AF6BB6780" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_40C67D1259673920514E7C3AF6BBC934" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_C30ACA28A89C02665E897C3AF6BB802D" xlink:type="locator" />
    <link: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_4645DF4025D5C4A8B4DB7C3AF6BB6780" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_C30ACA28A89C02665E897C3AF6BB802D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_CB9CB6440FC737420EB27C3AF6BB3D12" xlink:type="locator" />
    <link: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_F205AF1E55557F7CC0547C3AF6BBDF6C" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_CB9CB6440FC737420EB27C3AF6BB3D12" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_69BD2C75F45A0C04D3BE7C3AF6BBCC1E" xlink:type="locator" />
    <link: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_CB9CB6440FC737420EB27C3AF6BB3D12" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_69BD2C75F45A0C04D3BE7C3AF6BBCC1E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_300B20A4D414DB9B562C7C3AF6BB2B41" xlink:type="locator" />
    <link: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_CB9CB6440FC737420EB27C3AF6BB3D12" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_300B20A4D414DB9B562C7C3AF6BB2B41" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_396B0E5577AA01CFCA467C3AF6BB6B05" xlink:type="locator" />
    <link: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_CB9CB6440FC737420EB27C3AF6BB3D12" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_396B0E5577AA01CFCA467C3AF6BB6B05" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_B0E6E96F3AB3B0C5A5017C3AF6BBC9B9" xlink:type="locator" />
    <link: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_CB9CB6440FC737420EB27C3AF6BB3D12" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_B0E6E96F3AB3B0C5A5017C3AF6BBC9B9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_E5D02425813121EBFAA17C3AF6BBEF57" xlink:type="locator" />
    <link: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_CB9CB6440FC737420EB27C3AF6BB3D12" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_E5D02425813121EBFAA17C3AF6BBEF57" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/StockBasedCompensationSummaryOfStockOptionPlansDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_CFD491EDB79166995B387C3AF701848B" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_4E1927C456546BBCB6057C3AF701FDE8" xlink:type="locator" />
    <link: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_CFD491EDB79166995B387C3AF701848B" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_4E1927C456546BBCB6057C3AF701FDE8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_2E2DB4EE7BC8A7D012D37C3AF701BB5A" xlink:type="locator" />
    <link: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_4E1927C456546BBCB6057C3AF701FDE8" xlink:to="loc_us-gaap_AwardTypeAxis_2E2DB4EE7BC8A7D012D37C3AF701BB5A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_CEE251BB1FAD95392DA87C3AF701B78C" xlink:type="locator" />
    <link: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_2E2DB4EE7BC8A7D012D37C3AF701BB5A" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_CEE251BB1FAD95392DA87C3AF701B78C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="loc_us-gaap_EmployeeStockOptionMember_0486D332197C2237CC327C3AF701B90B" xlink:type="locator" />
    <link: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_CEE251BB1FAD95392DA87C3AF701B78C" xlink:to="loc_us-gaap_EmployeeStockOptionMember_0486D332197C2237CC327C3AF701B90B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_F5BDB835A908637CC6367C3AF701D199" xlink:type="locator" />
    <link: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_4E1927C456546BBCB6057C3AF701FDE8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_F5BDB835A908637CC6367C3AF701D199" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_BD9AF4E35DB79A9483227C3AF701FE0F" xlink:type="locator" />
    <link: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_F5BDB835A908637CC6367C3AF701D199" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_BD9AF4E35DB79A9483227C3AF701FE0F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_2B9C660425881B6DE7977C3AF7016881" xlink:type="locator" />
    <link: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_BD9AF4E35DB79A9483227C3AF701FE0F" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_2B9C660425881B6DE7977C3AF7016881" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod_4911AADE13B77A4DF7B37C3AF7010CAD" xlink:type="locator" />
    <link: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_BD9AF4E35DB79A9483227C3AF701FE0F" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod_4911AADE13B77A4DF7B37C3AF7010CAD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_D9BFCE2FAA280369C0B67C3AF701F533" xlink:type="locator" />
    <link: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_BD9AF4E35DB79A9483227C3AF701FE0F" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_D9BFCE2FAA280369C0B67C3AF701F533" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod_DE0272123FE7D63860577C3AF7014583" xlink:type="locator" />
    <link: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_BD9AF4E35DB79A9483227C3AF701FE0F" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod_DE0272123FE7D63860577C3AF7014583" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_3189409E5D52EEEE1E937C3AF701DA9B" xlink:type="locator" />
    <link: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_BD9AF4E35DB79A9483227C3AF701FE0F" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_3189409E5D52EEEE1E937C3AF701DA9B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_057B7FF004A7D78D48927C3AF7016244" xlink:type="locator" />
    <link: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_F5BDB835A908637CC6367C3AF701D199" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_057B7FF004A7D78D48927C3AF7016244" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_A1C8ABDAED7DABD7D1507C3AF701BC2C" xlink:type="locator" />
    <link: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_057B7FF004A7D78D48927C3AF7016244" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_A1C8ABDAED7DABD7D1507C3AF701BC2C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_AA89150C6DA4E224D21D7C3AF7011D88" xlink:type="locator" />
    <link: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_057B7FF004A7D78D48927C3AF7016244" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_AA89150C6DA4E224D21D7C3AF7011D88" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_F799AFE7088BEAE239217C3AF701373D" xlink:type="locator" />
    <link: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_057B7FF004A7D78D48927C3AF7016244" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_F799AFE7088BEAE239217C3AF701373D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice_67379617CC0902E92F407C3AF70178D3" xlink:type="locator" />
    <link: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_057B7FF004A7D78D48927C3AF7016244" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice_67379617CC0902E92F407C3AF70178D3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_79F472E06839BDEDC7567C3AF701CAEE" xlink:type="locator" />
    <link: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_057B7FF004A7D78D48927C3AF7016244" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_79F472E06839BDEDC7567C3AF701CAEE" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract" xlink:label="loc_mrcy_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract_1342139978B77C51CD897C3AF701C862" xlink:type="locator" />
    <link: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_F5BDB835A908637CC6367C3AF701D199" xlink:to="loc_mrcy_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract_1342139978B77C51CD897C3AF701C862" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_544F1B16781EB9A881277C3AF7013516" xlink:type="locator" />
    <link: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_1342139978B77C51CD897C3AF701C862" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_544F1B16781EB9A881277C3AF7013516" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/StockBasedCompensationTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_036DC8EF102126FB63BF7C3AF69DE08A" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_C2AF1118A7560AA695077C3AF69DEF63" xlink:type="locator" />
    <link: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_036DC8EF102126FB63BF7C3AF69DE08A" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_C2AF1118A7560AA695077C3AF69DEF63" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfNonvestedShareActivityTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfNonvestedShareActivityTableTextBlock_21F1DBA0063223F7AE2D7C3AF69DAB5E" xlink:type="locator" />
    <link: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_036DC8EF102126FB63BF7C3AF69DE08A" xlink:to="loc_us-gaap_ScheduleOfNonvestedShareActivityTableTextBlock_21F1DBA0063223F7AE2D7C3AF69DAB5E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock" xlink:label="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock_462B0558391C09ECA9A87C3AF69D748E" xlink:type="locator" />
    <link: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_036DC8EF102126FB63BF7C3AF69DE08A" xlink:to="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock_462B0558391C09ECA9A87C3AF69D748E" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/SubsequentEvents" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SubsequentEventsAbstract" xlink:label="loc_us-gaap_SubsequentEventsAbstract_A8F07EAB20DD7CD27E607C3AF6614FF6" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SubsequentEventsTextBlock" xlink:label="loc_us-gaap_SubsequentEventsTextBlock_2A40CF749C17BC7E79DB7C3AF661A195" xlink:type="locator" />
    <link: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_A8F07EAB20DD7CD27E607C3AF6614FF6" xlink:to="loc_us-gaap_SubsequentEventsTextBlock_2A40CF749C17BC7E79DB7C3AF661A195" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/SummaryOfSignificantAccountingPolicies" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_978BE7DF02C2C43FE2F07C3AF6CF29E3" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SignificantAccountingPoliciesTextBlock" xlink:label="loc_us-gaap_SignificantAccountingPoliciesTextBlock_26E050CE49C88AB305ED7C3AF6CFAD90" xlink:type="locator" />
    <link: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_978BE7DF02C2C43FE2F07C3AF6CF29E3" xlink:to="loc_us-gaap_SignificantAccountingPoliciesTextBlock_26E050CE49C88AB305ED7C3AF6CFAD90" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/SummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_70070B7F33A54435068419B6F64F87FD" xlink:type="locator" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_SignificantAccountingPoliciesTable" xlink:label="loc_mrcy_SignificantAccountingPoliciesTable_75CED90CBC97EF90997719B6F64FC879" xlink:type="locator" />
    <link: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_70070B7F33A54435068419B6F64F87FD" xlink:to="loc_mrcy_SignificantAccountingPoliciesTable_75CED90CBC97EF90997719B6F64FC879" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredRevenueArrangementTypeAxis" xlink:label="loc_us-gaap_DeferredRevenueArrangementTypeAxis_96589076C5C072EA507F19B6F64F2794" xlink:type="locator" />
    <link: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_75CED90CBC97EF90997719B6F64FC879" xlink:to="loc_us-gaap_DeferredRevenueArrangementTypeAxis_96589076C5C072EA507F19B6F64F2794" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredRevenueArrangementTypeDomain" xlink:label="loc_us-gaap_DeferredRevenueArrangementTypeDomain_A5B8D23EE990074FCF9619B6F64F47AC" xlink:type="locator" />
    <link: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_96589076C5C072EA507F19B6F64F2794" xlink:to="loc_us-gaap_DeferredRevenueArrangementTypeDomain_A5B8D23EE990074FCF9619B6F64F47AC" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_ShipandBillMember" xlink:label="loc_mrcy_ShipandBillMember_A8C3C3E4EB7DFEAC50B019B6F65077FB" xlink:type="locator" />
    <link: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_A5B8D23EE990074FCF9619B6F64F47AC" xlink:to="loc_mrcy_ShipandBillMember_A8C3C3E4EB7DFEAC50B019B6F65077FB" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_MultipleDeliveryRevenueMember" xlink:label="loc_mrcy_MultipleDeliveryRevenueMember_D1DE618691EC0952F6CD19B6F6504344" xlink:type="locator" />
    <link: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_DeferredRevenueArrangementTypeDomain_A5B8D23EE990074FCF9619B6F64F47AC" xlink:to="loc_mrcy_MultipleDeliveryRevenueMember_D1DE618691EC0952F6CD19B6F6504344" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_ContractAccountingMember" xlink:label="loc_mrcy_ContractAccountingMember_9A619B768836AB2DC82119B6F6501BA0" xlink:type="locator" />
    <link: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_DeferredRevenueArrangementTypeDomain_A5B8D23EE990074FCF9619B6F64F47AC" xlink:to="loc_mrcy_ContractAccountingMember_9A619B768836AB2DC82119B6F6501BA0" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_SignificantAccountingPoliciesLineItems" xlink:label="loc_mrcy_SignificantAccountingPoliciesLineItems_8387EC285C68101CB72719B6F6502D19" xlink:type="locator" />
    <link: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_75CED90CBC97EF90997719B6F64FC879" xlink:to="loc_mrcy_SignificantAccountingPoliciesLineItems_8387EC285C68101CB72719B6F6502D19" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_RevenueRecognitionNumberOfAccountingMethods" xlink:label="loc_mrcy_RevenueRecognitionNumberOfAccountingMethods_89A311F7B06D36F38C8119B7BCE7AF0E" xlink:type="locator" />
    <link: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_8387EC285C68101CB72719B6F6502D19" xlink:to="loc_mrcy_RevenueRecognitionNumberOfAccountingMethods_89A311F7B06D36F38C8119B7BCE7AF0E" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_AccountsReceivablePurchaseAgreementMaximumReceivableBalances" xlink:label="loc_mrcy_AccountsReceivablePurchaseAgreementMaximumReceivableBalances_3037A6F99D716258181A19B6F650D2FE" xlink:type="locator" />
    <link: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_SignificantAccountingPoliciesLineItems_8387EC285C68101CB72719B6F6502D19" xlink:to="loc_mrcy_AccountsReceivablePurchaseAgreementMaximumReceivableBalances_3037A6F99D716258181A19B6F650D2FE" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_AccountsReceivableFactored" xlink:label="loc_mrcy_AccountsReceivableFactored_306BB7F87B3BF8ED818F19B6F6500593" xlink:type="locator" />
    <link: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_SignificantAccountingPoliciesLineItems_8387EC285C68101CB72719B6F6502D19" xlink:to="loc_mrcy_AccountsReceivableFactored_306BB7F87B3BF8ED818F19B6F6500593" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_AccountsReceivableFactoringFees" xlink:label="loc_mrcy_AccountsReceivableFactoringFees_96F1171F56C281B3BA6F19B6F650A8B5" xlink:type="locator" />
    <link: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_SignificantAccountingPoliciesLineItems_8387EC285C68101CB72719B6F6502D19" xlink:to="loc_mrcy_AccountsReceivableFactoringFees_96F1171F56C281B3BA6F19B6F650A8B5" xlink:type="arc" />
    <link:loc xlink:href="mrcy-20180331.xsd#mrcy_PercentageOfRevenueRecognized" xlink:label="loc_mrcy_PercentageOfRevenueRecognized_3FE341C4144C9853EAB619B6F65038E2" xlink:type="locator" />
    <link: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_SignificantAccountingPoliciesLineItems_8387EC285C68101CB72719B6F6502D19" xlink:to="loc_mrcy_PercentageOfRevenueRecognized_3FE341C4144C9853EAB619B6F65038E2" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/SummaryOfSignificantAccountingPoliciesBasicAndDilutedWeightedAverageSharesOutstandingDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EarningsPerShareAbstract" xlink:label="loc_us-gaap_EarningsPerShareAbstract_D8A20C226966B2E759287C3AF675610B" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_51CBF2F06FC9BCC85E1D7C3AF675785F" xlink:type="locator" />
    <link:presentationArc order="1" 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_D8A20C226966B2E759287C3AF675610B" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_51CBF2F06FC9BCC85E1D7C3AF675785F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment" xlink:label="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_AE9546FC811C68D7B46A7C3AF675C305" xlink:type="locator" />
    <link: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_EarningsPerShareAbstract_D8A20C226966B2E759287C3AF675610B" xlink:to="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_AE9546FC811C68D7B46A7C3AF675C305" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_8ACB6C3B5D82E72927627C3AF675A75D" xlink:type="locator" />
    <link: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_EarningsPerShareAbstract_D8A20C226966B2E759287C3AF675610B" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_8ACB6C3B5D82E72927627C3AF675A75D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_34D574F8B4B8CE2784F67C3AF6756B18" xlink:type="locator" />
    <link: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_EarningsPerShareAbstract_D8A20C226966B2E759287C3AF675610B" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_34D574F8B4B8CE2784F67C3AF6756B18" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/SummaryOfSignificantAccountingPoliciesPolicies" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_32D2CCA99843A296AA597C3AF6F7B218" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BasisOfAccountingPolicyPolicyTextBlock" xlink:label="loc_us-gaap_BasisOfAccountingPolicyPolicyTextBlock_3B66F319999810454FBA7C3AF6F76D65" xlink:type="locator" />
    <link: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_32D2CCA99843A296AA597C3AF6F7B218" xlink:to="loc_us-gaap_BasisOfAccountingPolicyPolicyTextBlock_3B66F319999810454FBA7C3AF6F76D65" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_UseOfEstimates" xlink:label="loc_us-gaap_UseOfEstimates_3A83211B68BD294A4E777C3AF6F73176" xlink:type="locator" />
    <link: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_AccountingPoliciesAbstract_32D2CCA99843A296AA597C3AF6F7B218" xlink:to="loc_us-gaap_UseOfEstimates_3A83211B68BD294A4E777C3AF6F73176" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationsPolicy" xlink:label="loc_us-gaap_BusinessCombinationsPolicy_58581E2868AD826570107C3AF6F784B6" xlink:type="locator" />
    <link: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_AccountingPoliciesAbstract_32D2CCA99843A296AA597C3AF6F7B218" xlink:to="loc_us-gaap_BusinessCombinationsPolicy_58581E2868AD826570107C3AF6F784B6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock" xlink:label="loc_us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock_7134184D4F4C871FA3837C3AF6F7EBB0" xlink:type="locator" />
    <link: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_AccountingPoliciesAbstract_32D2CCA99843A296AA597C3AF6F7B218" xlink:to="loc_us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock_7134184D4F4C871FA3837C3AF6F7EBB0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ReceivablesPolicyTextBlock" xlink:label="loc_us-gaap_ReceivablesPolicyTextBlock_4A3647AFE3D5ACF5B3D87C3AF6F7E7D4" xlink:type="locator" />
    <link: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_AccountingPoliciesAbstract_32D2CCA99843A296AA597C3AF6F7B218" xlink:to="loc_us-gaap_ReceivablesPolicyTextBlock_4A3647AFE3D5ACF5B3D87C3AF6F7E7D4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RevenueRecognitionPolicyTextBlock" xlink:label="loc_us-gaap_RevenueRecognitionPolicyTextBlock_CD91A03E98E0349D3E677C3AF6F763F0" xlink:type="locator" />
    <link: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_AccountingPoliciesAbstract_32D2CCA99843A296AA597C3AF6F7B218" xlink:to="loc_us-gaap_RevenueRecognitionPolicyTextBlock_CD91A03E98E0349D3E677C3AF6F763F0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EarningsPerSharePolicyTextBlock" xlink:label="loc_us-gaap_EarningsPerSharePolicyTextBlock_7F7D6E6020F731A9E3BD7C3AF6F760A5" xlink:type="locator" />
    <link: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_AccountingPoliciesAbstract_32D2CCA99843A296AA597C3AF6F7B218" xlink:to="loc_us-gaap_EarningsPerSharePolicyTextBlock_7F7D6E6020F731A9E3BD7C3AF6F760A5" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.mrcy.com/role/SummaryOfSignificantAccountingPoliciesTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_5F227BF9BF4336E4B4B77C3AF6E32012" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfWeightedAverageNumberOfSharesTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfWeightedAverageNumberOfSharesTableTextBlock_2A1487200A9C8597CB307C3AF6E34BE8" xlink:type="locator" />
    <link: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_5F227BF9BF4336E4B4B77C3AF6E32012" xlink:to="loc_us-gaap_ScheduleOfWeightedAverageNumberOfSharesTableTextBlock_2A1487200A9C8597CB307C3AF6E34BE8" xlink:type="arc" />
  </link:presentationLink>
</link:linkbase>
