<?xml version="1.0" encoding="US-ASCII"?>
<!--XBRL Document Created with WebFilings-->
<!-- -->
<linkbase xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <roleRef roleURI="http://mrcy.com/role/BasicAndDilutedWeightedAverageSharesOutstandingDetail" xlink:href="mrcy-20140331.xsd#BasicAndDilutedWeightedAverageSharesOutstandingDetail" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/ChangesInCarryingAmountOfGoodwillDetail" xlink:href="mrcy-20140331.xsd#ChangesInCarryingAmountOfGoodwillDetail" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/CommitmentsAndContingencies" xlink:href="mrcy-20140331.xsd#CommitmentsAndContingencies" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/CommitmentsAndContingenciesAdditionalInformationDetail" xlink:href="mrcy-20140331.xsd#CommitmentsAndContingenciesAdditionalInformationDetail" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/ConsolidatedBalanceSheets" xlink:href="mrcy-20140331.xsd#ConsolidatedBalanceSheets" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:href="mrcy-20140331.xsd#ConsolidatedBalanceSheetsParenthetical" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/ConsolidatedStatementsOfCashFlows" xlink:href="mrcy-20140331.xsd#ConsolidatedStatementsOfCashFlows" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/ConsolidatedStatementsOfOperationsAndComprehensiveLoss" xlink:href="mrcy-20140331.xsd#ConsolidatedStatementsOfOperationsAndComprehensiveLoss" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/CustomersComprisingTenPercentOrMoreRevenuesDetail" xlink:href="mrcy-20140331.xsd#CustomersComprisingTenPercentOrMoreRevenuesDetail" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/CustomersComprisingTenPercentOrMoreRevenuesParentheticalDetail" xlink:href="mrcy-20140331.xsd#CustomersComprisingTenPercentOrMoreRevenuesParentheticalDetail" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/Debt" xlink:href="mrcy-20140331.xsd#Debt" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/DebtAdditionalInformationDetail" xlink:href="mrcy-20140331.xsd#DebtAdditionalInformationDetail" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/DescriptionOfBusiness" xlink:href="mrcy-20140331.xsd#DescriptionOfBusiness" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/DescriptionOfBusinessDetails" xlink:href="mrcy-20140331.xsd#DescriptionOfBusinessDetails" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/DocumentAndEntityInformation" xlink:href="mrcy-20140331.xsd#DocumentAndEntityInformation" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/ExpensesByReportableSegmentForRestructuringPlansDetail" xlink:href="mrcy-20140331.xsd#ExpensesByReportableSegmentForRestructuringPlansDetail" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/FairValueOfFinancialInstruments" xlink:href="mrcy-20140331.xsd#FairValueOfFinancialInstruments" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/FairValueOfFinancialInstrumentsTables" xlink:href="mrcy-20140331.xsd#FairValueOfFinancialInstrumentsTables" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/GeographicDistributionOfRevenuesAndLongLivedAssetsFromContinuingOperationsDetail" xlink:href="mrcy-20140331.xsd#GeographicDistributionOfRevenuesAndLongLivedAssetsFromContinuingOperationsDetail" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/Goodwill" xlink:href="mrcy-20140331.xsd#Goodwill" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/GoodwillAdditionalInformationDetail" xlink:href="mrcy-20140331.xsd#GoodwillAdditionalInformationDetail" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/GoodwillTables" xlink:href="mrcy-20140331.xsd#GoodwillTables" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/IncomeTaxes" xlink:href="mrcy-20140331.xsd#IncomeTaxes" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/IncomeTaxesAdditionalInformationDetail" xlink:href="mrcy-20140331.xsd#IncomeTaxesAdditionalInformationDetail" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/Inventory" xlink:href="mrcy-20140331.xsd#Inventory" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/InventoryAdditionalInformationDetail" xlink:href="mrcy-20140331.xsd#InventoryAdditionalInformationDetail" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/InventoryDetail" xlink:href="mrcy-20140331.xsd#InventoryDetail" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/InventoryTables" xlink:href="mrcy-20140331.xsd#InventoryTables" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/OperatingSegmentGeographicInformationAndSignificantCustomers" xlink:href="mrcy-20140331.xsd#OperatingSegmentGeographicInformationAndSignificantCustomers" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/OperatingSegmentGeographicInformationAndSignificantCustomersAdditionalInformationDetails" xlink:href="mrcy-20140331.xsd#OperatingSegmentGeographicInformationAndSignificantCustomersAdditionalInformationDetails" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/OperatingSegmentGeographicInformationAndSignificantCustomersTables" xlink:href="mrcy-20140331.xsd#OperatingSegmentGeographicInformationAndSignificantCustomersTables" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/ProgramsComprisingTenPercentOrMoreOfCompanysRevenueDetail" xlink:href="mrcy-20140331.xsd#ProgramsComprisingTenPercentOrMoreOfCompanysRevenueDetail" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/ReconcilesNetIncomeLossMostDirectlyComparableGaapFinancialMeasureToAdjustedEbitdaDetail" xlink:href="mrcy-20140331.xsd#ReconcilesNetIncomeLossMostDirectlyComparableGaapFinancialMeasureToAdjustedEbitdaDetail" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/RestructuringPlan" xlink:href="mrcy-20140331.xsd#RestructuringPlan" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/RestructuringPlanAdditionalInformationDetail" xlink:href="mrcy-20140331.xsd#RestructuringPlanAdditionalInformationDetail" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/RestructuringPlanTables" xlink:href="mrcy-20140331.xsd#RestructuringPlanTables" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/StockBasedCompensation" xlink:href="mrcy-20140331.xsd#StockBasedCompensation" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/StockBasedCompensationAdditionalInformationDetail" xlink:href="mrcy-20140331.xsd#StockBasedCompensationAdditionalInformationDetail" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/StockBasedCompensationExpensesDetail" xlink:href="mrcy-20140331.xsd#StockBasedCompensationExpensesDetail" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/StockBasedCompensationTables" xlink:href="mrcy-20140331.xsd#StockBasedCompensationTables" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/SubsequentEvents" xlink:href="mrcy-20140331.xsd#SubsequentEvents" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/SummaryOfFinancialAssetsMeasuredAtFairValueOnRecurringBasisDetail" xlink:href="mrcy-20140331.xsd#SummaryOfFinancialAssetsMeasuredAtFairValueOnRecurringBasisDetail" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/SummaryOfNonvestedRestrictedStockDetail" xlink:href="mrcy-20140331.xsd#SummaryOfNonvestedRestrictedStockDetail" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/SummaryOfPerformanceOfOperationsByReportableSegmentDetail" xlink:href="mrcy-20140331.xsd#SummaryOfPerformanceOfOperationsByReportableSegmentDetail" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/SummaryOfSignificantAccountingPolicies" xlink:href="mrcy-20140331.xsd#SummaryOfSignificantAccountingPolicies" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/SummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" xlink:href="mrcy-20140331.xsd#SummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/SummaryOfSignificantAccountingPoliciesPolicies" xlink:href="mrcy-20140331.xsd#SummaryOfSignificantAccountingPoliciesPolicies" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/SummaryOfSignificantAccountingPoliciesTables" xlink:href="mrcy-20140331.xsd#SummaryOfSignificantAccountingPoliciesTables" xlink:type="simple" />
  <roleRef roleURI="http://mrcy.com/role/SummaryOfStockOptionPlansDetail" xlink:href="mrcy-20140331.xsd#SummaryOfStockOptionPlansDetail" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedLabel" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedNetLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedNetLabel" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodEndLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodEndLabel" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodStartLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodStartLabel" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTerseLabel" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTotalLabel" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/netLabel" xlink:href="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd#netLabel" xlink:type="simple" />
  <presentationLink xlink:role="http://mrcy.com/role/BasicAndDilutedWeightedAverageSharesOutstandingDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EarningsPerShareAbstract" xlink:label="loc_us-gaap_EarningsPerShareAbstract_B56AD50146D9A04EC22A03DFF50A60B0" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_8BC2D1241614603B815F03DFF50AD53E" xlink:type="locator" />
    <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_B56AD50146D9A04EC22A03DFF50A60B0" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_8BC2D1241614603B815F03DFF50AD53E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment" xlink:label="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_2D8E8BB8E54BAD9FDF1603DFF50AC0D9" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareAbstract_B56AD50146D9A04EC22A03DFF50A60B0" xlink:to="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_2D8E8BB8E54BAD9FDF1603DFF50AC0D9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_4CE42060B501110D40F903DFF50A38B4" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareAbstract_B56AD50146D9A04EC22A03DFF50A60B0" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_4CE42060B501110D40F903DFF50A38B4" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/ChangesInCarryingAmountOfGoodwillDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_B4A24F19DDBDE2E0A3C203DFF4F90DA6" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfGoodwillTable" xlink:label="loc_us-gaap_ScheduleOfGoodwillTable_6B40B3D51E09ABFF97E203DFF4F9269F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_B4A24F19DDBDE2E0A3C203DFF4F90DA6" xlink:to="loc_us-gaap_ScheduleOfGoodwillTable_6B40B3D51E09ABFF97E203DFF4F9269F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_D70441EA070DFAE4A08E03DFF4F97B2D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_6B40B3D51E09ABFF97E203DFF4F9269F" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_D70441EA070DFAE4A08E03DFF4F97B2D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_A72CA11973210F0D4B9003DFF4FAF449" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_D70441EA070DFAE4A08E03DFF4F97B2D" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_A72CA11973210F0D4B9003DFF4FAF449" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_MicroneticsMember" xlink:label="loc_mrcy_MicroneticsMember_8B1924482226DD21922303DFF4FAAA3E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_A72CA11973210F0D4B9003DFF4FAF449" xlink:to="loc_mrcy_MicroneticsMember_8B1924482226DD21922303DFF4FAAA3E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_3ADAE6624666515B3D7F03DFF4FA15F9" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_6B40B3D51E09ABFF97E203DFF4F9269F" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_3ADAE6624666515B3D7F03DFF4FA15F9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_663ED527058897E3F41A03DFF4FA370C" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_3ADAE6624666515B3D7F03DFF4FA15F9" xlink:to="loc_us-gaap_SegmentDomain_663ED527058897E3F41A03DFF4FA370C" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_MercuryCommercialElectronicsMember" xlink:label="loc_mrcy_MercuryCommercialElectronicsMember_F6104CA70D446C4D390E03DFF4FA509C" xlink:type="locator" />
    <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_SegmentDomain_663ED527058897E3F41A03DFF4FA370C" xlink:to="loc_mrcy_MercuryCommercialElectronicsMember_F6104CA70D446C4D390E03DFF4FA509C" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_MercuryDefenseSystemsMember" xlink:label="loc_mrcy_MercuryDefenseSystemsMember_FE5047A5FA8B3CF52AEC03DFF4FA8C8A" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentDomain_663ED527058897E3F41A03DFF4FA370C" xlink:to="loc_mrcy_MercuryDefenseSystemsMember_FE5047A5FA8B3CF52AEC03DFF4FA8C8A" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_MercuryIntelligenceSystemsMember" xlink:label="loc_mrcy_MercuryIntelligenceSystemsMember_762314E2A24FD1E5105A03DFF4FA32F9" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentDomain_663ED527058897E3F41A03DFF4FA370C" xlink:to="loc_mrcy_MercuryIntelligenceSystemsMember_762314E2A24FD1E5105A03DFF4FA32F9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_GoodwillLineItems" xlink:label="loc_us-gaap_GoodwillLineItems_739576C5991892925B3003DFF4FAC007" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_6B40B3D51E09ABFF97E203DFF4F9269F" xlink:to="loc_us-gaap_GoodwillLineItems_739576C5991892925B3003DFF4FAC007" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_GoodwillRollForward" xlink:label="loc_us-gaap_GoodwillRollForward_243FBB6D4071B2D37D7E03DFF4FB0488" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillLineItems_739576C5991892925B3003DFF4FAC007" xlink:to="loc_us-gaap_GoodwillRollForward_243FBB6D4071B2D37D7E03DFF4FB0488" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_4B333A130043C0A5A21503DFF4FB2095" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillRollForward_243FBB6D4071B2D37D7E03DFF4FB0488" xlink:to="loc_us-gaap_Goodwill_4B333A130043C0A5A21503DFF4FB2095" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_GoodwillPeriodIncreaseDecrease" xlink:label="loc_us-gaap_GoodwillPeriodIncreaseDecrease_2E5B3CC47DB2DE6A7BED03DFF4FBDCED" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillRollForward_243FBB6D4071B2D37D7E03DFF4FB0488" xlink:to="loc_us-gaap_GoodwillPeriodIncreaseDecrease_2E5B3CC47DB2DE6A7BED03DFF4FBDCED" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_D7C28E4DBAC70A8CD58403DFF4FBBA9E" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillRollForward_243FBB6D4071B2D37D7E03DFF4FB0488" xlink:to="loc_us-gaap_Goodwill_D7C28E4DBAC70A8CD58403DFF4FBBA9E" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/CommitmentsAndContingencies" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:label="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_AE5F88E1E323FCB7A81603DFF556348C" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureTextBlock" xlink:label="loc_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_E3E7D98BB420DF97752203DFF557EFCC" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_AE5F88E1E323FCB7A81603DFF556348C" xlink:to="loc_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_E3E7D98BB420DF97752203DFF557EFCC" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/CommitmentsAndContingenciesAdditionalInformationDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:label="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_A1272ECA1C5284E0C34B03DFF5463C5F" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongTermPurchaseCommitmentTable" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentTable_198E32DE1D118A4477D003DFF5467B3B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_A1272ECA1C5284E0C34B03DFF5463C5F" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentTable_198E32DE1D118A4477D003DFF5467B3B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_772684AFA57A4A7F3B5703DFF546A760" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentTable_198E32DE1D118A4477D003DFF5467B3B" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_772684AFA57A4A7F3B5703DFF546A760" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_951C980EA1AD01DEAB6303DFF5466526" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_772684AFA57A4A7F3B5703DFF546A760" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_951C980EA1AD01DEAB6303DFF5466526" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_NonCancelablePurchaseCommitmentsMember" xlink:label="loc_mrcy_NonCancelablePurchaseCommitmentsMember_F86EE9067532B43F82C003DFF5467E62" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_951C980EA1AD01DEAB6303DFF5466526" xlink:to="loc_mrcy_NonCancelablePurchaseCommitmentsMember_F86EE9067532B43F82C003DFF5467E62" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongTermPurchaseCommitmentLineItems" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentLineItems_B389FFCAAAFC5F639FB403DFF5464DD2" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentTable_198E32DE1D118A4477D003DFF5467B3B" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentLineItems_B389FFCAAAFC5F639FB403DFF5464DD2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SignificantPurchaseCommitmentRemainingMinimumAmountCommitted" xlink:label="loc_us-gaap_SignificantPurchaseCommitmentRemainingMinimumAmountCommitted_49B1404A86B874679B6D03DFF5468275" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_B389FFCAAAFC5F639FB403DFF5464DD2" xlink:to="loc_us-gaap_SignificantPurchaseCommitmentRemainingMinimumAmountCommitted_49B1404A86B874679B6D03DFF5468275" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/ConsolidatedBalanceSheets" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="loc_us-gaap_StatementOfFinancialPositionAbstract_CE1FDBCAA1AF0DB08266D34F1D3B5AAD" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="loc_us-gaap_AssetsAbstract_57DE12F1FB219C2B9E51D34F1D3BDA48" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_CE1FDBCAA1AF0DB08266D34F1D3B5AAD" xlink:to="loc_us-gaap_AssetsAbstract_57DE12F1FB219C2B9E51D34F1D3BDA48" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="loc_us-gaap_AssetsCurrentAbstract_DA6ACA2DB4D74F1FF6C2D34F1D3B3E87" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_57DE12F1FB219C2B9E51D34F1D3BDA48" xlink:to="loc_us-gaap_AssetsCurrentAbstract_DA6ACA2DB4D74F1FF6C2D34F1D3B3E87" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_6CDAC7FFDFFA7CDA0E7DD34F1D3B974F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_DA6ACA2DB4D74F1FF6C2D34F1D3B3E87" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_6CDAC7FFDFFA7CDA0E7DD34F1D3B974F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_831E677DE5D8ED5DE16DD34F1D3B53A9" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_DA6ACA2DB4D74F1FF6C2D34F1D3B3E87" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_831E677DE5D8ED5DE16DD34F1D3B53A9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CostsInExcessOfBillingsOnUncompletedContractsOrProgramsExpectedToBeCollectedWithinOneYear" xlink:label="loc_us-gaap_CostsInExcessOfBillingsOnUncompletedContractsOrProgramsExpectedToBeCollectedWithinOneYear_C921496C3C0F3AADBA43D34F1D3B0728" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_DA6ACA2DB4D74F1FF6C2D34F1D3B3E87" xlink:to="loc_us-gaap_CostsInExcessOfBillingsOnUncompletedContractsOrProgramsExpectedToBeCollectedWithinOneYear_C921496C3C0F3AADBA43D34F1D3B0728" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InventoryNet" xlink:label="loc_us-gaap_InventoryNet_9C797FA6B84CEFC7A35AD34F1D3B5808" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_DA6ACA2DB4D74F1FF6C2D34F1D3B3E87" xlink:to="loc_us-gaap_InventoryNet_9C797FA6B84CEFC7A35AD34F1D3B5808" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsNetCurrent" xlink:label="loc_us-gaap_DeferredTaxAssetsNetCurrent_D132C864A1271F4628EDD34F1D3B3B31" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_DA6ACA2DB4D74F1FF6C2D34F1D3B3E87" xlink:to="loc_us-gaap_DeferredTaxAssetsNetCurrent_D132C864A1271F4628EDD34F1D3B3B31" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PrepaidTaxes" xlink:label="loc_us-gaap_PrepaidTaxes_38FFEDECBDCD027BDB12D34F1D3BCA21" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_DA6ACA2DB4D74F1FF6C2D34F1D3B3E87" xlink:to="loc_us-gaap_PrepaidTaxes_38FFEDECBDCD027BDB12D34F1D3BCA21" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_C9D68D6A692F2F4DF570D34F1D3BB021" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_DA6ACA2DB4D74F1FF6C2D34F1D3B3E87" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_C9D68D6A692F2F4DF570D34F1D3BB021" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="loc_us-gaap_AssetsCurrent_1E7434C290EECF555A99D34F1D3B50CA" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_DA6ACA2DB4D74F1FF6C2D34F1D3B3E87" xlink:to="loc_us-gaap_AssetsCurrent_1E7434C290EECF555A99D34F1D3B50CA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsNoncurrent" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsNoncurrent_9EA6C9B47A3247243DE6D34F1D3B726C" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_57DE12F1FB219C2B9E51D34F1D3BDA48" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsNoncurrent_9EA6C9B47A3247243DE6D34F1D3B726C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_5B3947BE1E57C8A566F7D34F1D3CD58E" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_57DE12F1FB219C2B9E51D34F1D3BDA48" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_5B3947BE1E57C8A566F7D34F1D3CD58E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_EF9C2AC4073E00E1819ED34F1D3CD179" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_57DE12F1FB219C2B9E51D34F1D3BDA48" xlink:to="loc_us-gaap_Goodwill_EF9C2AC4073E00E1819ED34F1D3CD179" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_3608AA0F0DE3FDEF9487D34F1D3C7A8D" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_57DE12F1FB219C2B9E51D34F1D3BDA48" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_3608AA0F0DE3FDEF9487D34F1D3C7A8D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_AAB098AE065748C2B95BD34F1D3CF012" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_57DE12F1FB219C2B9E51D34F1D3BDA48" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_AAB098AE065748C2B95BD34F1D3CF012" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_BAE7581415618F33D3FFD34F1D3C97DA" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_57DE12F1FB219C2B9E51D34F1D3BDA48" xlink:to="loc_us-gaap_Assets_BAE7581415618F33D3FFD34F1D3C97DA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_29B3CE2F4772844D5DAED34F1D3CD443" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_CE1FDBCAA1AF0DB08266D34F1D3B5AAD" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_29B3CE2F4772844D5DAED34F1D3CD443" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract_4802577B5D3E692B3057D34F1D3C2366" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_29B3CE2F4772844D5DAED34F1D3CD443" xlink:to="loc_us-gaap_LiabilitiesCurrentAbstract_4802577B5D3E692B3057D34F1D3C2366" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccountsPayableCurrent" xlink:label="loc_us-gaap_AccountsPayableCurrent_F343A20E26483C282BDFD34F1D3CE950" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_4802577B5D3E692B3057D34F1D3C2366" xlink:to="loc_us-gaap_AccountsPayableCurrent_F343A20E26483C282BDFD34F1D3CE950" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_FD1356DCFC38FE097C6CD34F1D3C728E" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_4802577B5D3E692B3057D34F1D3C2366" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_FD1356DCFC38FE097C6CD34F1D3C728E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_7798FF0F5A6842636E20D34F1D3CC186" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_4802577B5D3E692B3057D34F1D3C2366" xlink:to="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_7798FF0F5A6842636E20D34F1D3CC186" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredRevenueCurrent" xlink:label="loc_us-gaap_DeferredRevenueCurrent_4DB48DD35C4BF844D45DD34F1D3CEB1C" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_4802577B5D3E692B3057D34F1D3C2366" xlink:to="loc_us-gaap_DeferredRevenueCurrent_4DB48DD35C4BF844D45DD34F1D3CEB1C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="loc_us-gaap_LiabilitiesCurrent_3F241A8CCB22E61EC251D34F1D3C6FC7" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_4802577B5D3E692B3057D34F1D3C2366" xlink:to="loc_us-gaap_LiabilitiesCurrent_3F241A8CCB22E61EC251D34F1D3C6FC7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SaleLeasebackTransactionDeferredGainNet" xlink:label="loc_us-gaap_SaleLeasebackTransactionDeferredGainNet_47155338EBB87C6CDD11D34F1D3C0823" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_29B3CE2F4772844D5DAED34F1D3CD443" xlink:to="loc_us-gaap_SaleLeasebackTransactionDeferredGainNet_47155338EBB87C6CDD11D34F1D3C0823" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxLiabilitiesNoncurrent" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesNoncurrent_CC73A7D7DD2500C95A09D34F1D3C7ED7" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_29B3CE2F4772844D5DAED34F1D3CD443" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesNoncurrent_CC73A7D7DD2500C95A09D34F1D3C7ED7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccruedIncomeTaxesNoncurrent" xlink:label="loc_us-gaap_AccruedIncomeTaxesNoncurrent_2C776A1731017AF4497BD34F1D3CC99C" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_29B3CE2F4772844D5DAED34F1D3CD443" xlink:to="loc_us-gaap_AccruedIncomeTaxesNoncurrent_2C776A1731017AF4497BD34F1D3CC99C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_07A1ED6416AD40593CDCD34F1D3DEEC6" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_29B3CE2F4772844D5DAED34F1D3CD443" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_07A1ED6416AD40593CDCD34F1D3DEEC6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Liabilities" xlink:label="loc_us-gaap_Liabilities_485B6CBD07E0C71564FDD34F1D3DA07C" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_29B3CE2F4772844D5DAED34F1D3CD443" xlink:to="loc_us-gaap_Liabilities_485B6CBD07E0C71564FDD34F1D3DA07C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="loc_us-gaap_CommitmentsAndContingencies_C5647260C101E9CB5E24D34F1D3DAFB0" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_29B3CE2F4772844D5DAED34F1D3CD443" xlink:to="loc_us-gaap_CommitmentsAndContingencies_C5647260C101E9CB5E24D34F1D3DAFB0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="loc_us-gaap_StockholdersEquityAbstract_76D1A9BEE0601DBE989CD34F1D3D5D37" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_29B3CE2F4772844D5DAED34F1D3CD443" xlink:to="loc_us-gaap_StockholdersEquityAbstract_76D1A9BEE0601DBE989CD34F1D3D5D37" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PreferredStockValue" xlink:label="loc_us-gaap_PreferredStockValue_DCD9742BC9226DCF2C00D34F1D3DD15B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_76D1A9BEE0601DBE989CD34F1D3D5D37" xlink:to="loc_us-gaap_PreferredStockValue_DCD9742BC9226DCF2C00D34F1D3DD15B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommonStockValue" xlink:label="loc_us-gaap_CommonStockValue_BCE28730623FCC42ACCDD34F1D3DE9B5" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_76D1A9BEE0601DBE989CD34F1D3D5D37" xlink:to="loc_us-gaap_CommonStockValue_BCE28730623FCC42ACCDD34F1D3DE9B5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AdditionalPaidInCapital" xlink:label="loc_us-gaap_AdditionalPaidInCapital_880B961A2470E8F7661FD34F1D3D7D00" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_76D1A9BEE0601DBE989CD34F1D3D5D37" xlink:to="loc_us-gaap_AdditionalPaidInCapital_880B961A2470E8F7661FD34F1D3D7D00" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_1638B3B2273A85122465D34F1D3DB28F" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_76D1A9BEE0601DBE989CD34F1D3D5D37" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_1638B3B2273A85122465D34F1D3DB28F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_F05B5D11D0633F886C44D34F1D3D1491" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_76D1A9BEE0601DBE989CD34F1D3D5D37" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_F05B5D11D0633F886C44D34F1D3D1491" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_848B58E9BAFC73738EDDD34F1D3D310E" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_76D1A9BEE0601DBE989CD34F1D3D5D37" xlink:to="loc_us-gaap_StockholdersEquity_848B58E9BAFC73738EDDD34F1D3D310E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_670C901B5AA012BC0672D34F1D3D95D0" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_29B3CE2F4772844D5DAED34F1D3CD443" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquity_670C901B5AA012BC0672D34F1D3D95D0" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="loc_us-gaap_StatementOfFinancialPositionAbstract_0F273CCD5CEFA7302FDB03DFF4F53962" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_6D9EA2F4D521D29ED23B03DFF4F53CDF" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_0F273CCD5CEFA7302FDB03DFF4F53962" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_6D9EA2F4D521D29ED23B03DFF4F53CDF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PreferredStockParOrStatedValuePerShare" xlink:label="loc_us-gaap_PreferredStockParOrStatedValuePerShare_E68E7ED09FD7F664DA0D03DFF4F50854" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_0F273CCD5CEFA7302FDB03DFF4F53962" xlink:to="loc_us-gaap_PreferredStockParOrStatedValuePerShare_E68E7ED09FD7F664DA0D03DFF4F50854" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PreferredStockSharesAuthorized" xlink:label="loc_us-gaap_PreferredStockSharesAuthorized_FCE142016D1838D6F3E103DFF4F59CD9" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_0F273CCD5CEFA7302FDB03DFF4F53962" xlink:to="loc_us-gaap_PreferredStockSharesAuthorized_FCE142016D1838D6F3E103DFF4F59CD9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PreferredStockSharesIssued" xlink:label="loc_us-gaap_PreferredStockSharesIssued_922CDEC1CEF89B655E5B03DFF4F52B4E" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_0F273CCD5CEFA7302FDB03DFF4F53962" xlink:to="loc_us-gaap_PreferredStockSharesIssued_922CDEC1CEF89B655E5B03DFF4F52B4E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PreferredStockSharesOutstanding" xlink:label="loc_us-gaap_PreferredStockSharesOutstanding_F31CE5AA8514DBE3B44203DFF4F55CDE" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_0F273CCD5CEFA7302FDB03DFF4F53962" xlink:to="loc_us-gaap_PreferredStockSharesOutstanding_F31CE5AA8514DBE3B44203DFF4F55CDE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_CCFB81CCF9046984E67A03DFF4F54CC6" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_0F273CCD5CEFA7302FDB03DFF4F53962" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_CCFB81CCF9046984E67A03DFF4F54CC6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommonStockSharesAuthorized" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_4214E91E92E6363AAFFF03DFF4F5916A" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_0F273CCD5CEFA7302FDB03DFF4F53962" xlink:to="loc_us-gaap_CommonStockSharesAuthorized_4214E91E92E6363AAFFF03DFF4F5916A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommonStockSharesIssued" xlink:label="loc_us-gaap_CommonStockSharesIssued_2B5D44ACCDF8C3C0AD6E03DFF4F5A31A" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_0F273CCD5CEFA7302FDB03DFF4F53962" xlink:to="loc_us-gaap_CommonStockSharesIssued_2B5D44ACCDF8C3C0AD6E03DFF4F5A31A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_A1F79B46F439EE818DAF03DFF4F53FE9" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_0F273CCD5CEFA7302FDB03DFF4F53962" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_A1F79B46F439EE818DAF03DFF4F53FE9" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/ConsolidatedStatementsOfCashFlows" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementOfCashFlowsAbstract" xlink:label="loc_us-gaap_StatementOfCashFlowsAbstract_229D4B794B2AA39AD544D34F1D141453" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_FD2E03B7D209AA2E65C1D34F1D145A2E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_229D4B794B2AA39AD544D34F1D141453" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_FD2E03B7D209AA2E65C1D34F1D145A2E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_81F6BF35233F8F0DFBFCD34F1D15E9EA" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_FD2E03B7D209AA2E65C1D34F1D145A2E" xlink:to="loc_us-gaap_NetIncomeLoss_81F6BF35233F8F0DFBFCD34F1D15E9EA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_B2554B9BA234E64F49B5D34F1D15D17A" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_FD2E03B7D209AA2E65C1D34F1D145A2E" xlink:to="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_B2554B9BA234E64F49B5D34F1D15D17A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_113C8FBB5F27C8FB4476D34F1D1523F5" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_B2554B9BA234E64F49B5D34F1D15D17A" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_113C8FBB5F27C8FB4476D34F1D1523F5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_us-gaap_ShareBasedCompensation_98A2AF9A338A6838C8D6D34F1D15A0AC" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_B2554B9BA234E64F49B5D34F1D15D17A" xlink:to="loc_us-gaap_ShareBasedCompensation_98A2AF9A338A6838C8D6D34F1D15A0AC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_9C279210F6A81DDA48F3D34F1D151E95" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_B2554B9BA234E64F49B5D34F1D15D17A" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_9C279210F6A81DDA48F3D34F1D151E95" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities" xlink:label="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities_5DE4FF4F4BBE6B2686D3D34F1D156ABB" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_B2554B9BA234E64F49B5D34F1D15D17A" xlink:to="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities_5DE4FF4F4BBE6B2686D3D34F1D156ABB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherNoncashIncomeExpense" xlink:label="loc_us-gaap_OtherNoncashIncomeExpense_5A66D116615D8826F096D34F1D15FFCC" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_B2554B9BA234E64F49B5D34F1D15D17A" xlink:to="loc_us-gaap_OtherNoncashIncomeExpense_5A66D116615D8826F096D34F1D15FFCC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_5B65CE82BADC2E774C15D34F1D15DD52" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_B2554B9BA234E64F49B5D34F1D15D17A" xlink:to="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_5B65CE82BADC2E774C15D34F1D15DD52" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_5D46801A62FE7EDD22DBD34F1D158C84" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_5B65CE82BADC2E774C15D34F1D15DD52" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_5D46801A62FE7EDD22DBD34F1D158C84" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInInventories" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_36763652E79E99DEBE23D34F1D1558E1" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_5B65CE82BADC2E774C15D34F1D15DD52" xlink:to="loc_us-gaap_IncreaseDecreaseInInventories_36763652E79E99DEBE23D34F1D1558E1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidTaxes" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidTaxes_5291387B063EA506A51AD34F1D156EBB" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_5B65CE82BADC2E774C15D34F1D15DD52" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidTaxes_5291387B063EA506A51AD34F1D156EBB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidExpense" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidExpense_C7720C5187B1C9EF8C0DD34F1D154D02" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_5B65CE82BADC2E774C15D34F1D15DD52" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidExpense_C7720C5187B1C9EF8C0DD34F1D154D02" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInOtherNoncurrentAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentAssets_DFD68C31692847A2C096D34F1D15275D" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_5B65CE82BADC2E774C15D34F1D15DD52" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentAssets_DFD68C31692847A2C096D34F1D15275D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_42539127AA5F896D8A42D34F1D16E3F1" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_5B65CE82BADC2E774C15D34F1D15DD52" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_42539127AA5F896D8A42D34F1D16E3F1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInDeferredRevenueAndCustomerAdvancesAndDeposits" xlink:label="loc_us-gaap_IncreaseDecreaseInDeferredRevenueAndCustomerAdvancesAndDeposits_10C7D4E3D7B4EE6A900BD34F1D1BD09C" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_5B65CE82BADC2E774C15D34F1D15DD52" xlink:to="loc_us-gaap_IncreaseDecreaseInDeferredRevenueAndCustomerAdvancesAndDeposits_10C7D4E3D7B4EE6A900BD34F1D1BD09C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_BD674D850DFFF6C9B468D34F1D1B1C2B" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_5B65CE82BADC2E774C15D34F1D15DD52" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_BD674D850DFFF6C9B468D34F1D1B1C2B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities_420B5E0CB0E8C704E696D34F1D1BC292" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_5B65CE82BADC2E774C15D34F1D15DD52" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities_420B5E0CB0E8C704E696D34F1D1BC292" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_0A06864E8A8F36DCF069D34F1D1B6B59" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_FD2E03B7D209AA2E65C1D34F1D145A2E" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_0A06864E8A8F36DCF069D34F1D1B6B59" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_3BF4BEA1F1D50D571731D34F1D1B60BF" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_229D4B794B2AA39AD544D34F1D141453" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_3BF4BEA1F1D50D571731D34F1D1B60BF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_725860426A0D4C5384FAD34F1D1B4582" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_3BF4BEA1F1D50D571731D34F1D1B60BF" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_725860426A0D4C5384FAD34F1D1B4582" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_B6B02D9A2C128A6F9882D34F1D1B140D" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_3BF4BEA1F1D50D571731D34F1D1B60BF" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_B6B02D9A2C128A6F9882D34F1D1B140D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsForProceedsFromOtherInvestingActivities" xlink:label="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_4580A6F0B4C8D8E51DCFD34F1D1B5450" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_3BF4BEA1F1D50D571731D34F1D1B60BF" xlink:to="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_4580A6F0B4C8D8E51DCFD34F1D1B5450" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_893B05087E94B07119C6D34F1D1B94B1" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_3BF4BEA1F1D50D571731D34F1D1B60BF" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_893B05087E94B07119C6D34F1D1B94B1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_4F1B26DA1C413E68E54ED34F1D1BB30A" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_229D4B794B2AA39AD544D34F1D141453" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_4F1B26DA1C413E68E54ED34F1D1BB30A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromStockOptionsExercised" xlink:label="loc_us-gaap_ProceedsFromStockOptionsExercised_2A857137A505299CD25DD34F1D1C4561" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_4F1B26DA1C413E68E54ED34F1D1BB30A" xlink:to="loc_us-gaap_ProceedsFromStockOptionsExercised_2A857137A505299CD25DD34F1D1C4561" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities" xlink:label="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_7AA5D5E777E1C3A991AED34F1D1C716E" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_4F1B26DA1C413E68E54ED34F1D1BB30A" xlink:to="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_7AA5D5E777E1C3A991AED34F1D1C716E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsOfStockIssuanceCosts" xlink:label="loc_us-gaap_PaymentsOfStockIssuanceCosts_65B81D52F1DA9A2B752ED34F1D1C7FD9" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_4F1B26DA1C413E68E54ED34F1D1BB30A" xlink:to="loc_us-gaap_PaymentsOfStockIssuanceCosts_65B81D52F1DA9A2B752ED34F1D1C7FD9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt" xlink:label="loc_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt_D4E013B2ABD39AC6D3B3D34F1D1CAE48" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_4F1B26DA1C413E68E54ED34F1D1BB30A" xlink:to="loc_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt_D4E013B2ABD39AC6D3B3D34F1D1CAE48" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromRepaymentsOfRestrictedCashFinancingActivities" xlink:label="loc_us-gaap_ProceedsFromRepaymentsOfRestrictedCashFinancingActivities_6D4FC09CB84B1530F7A8D34F1D1C79DF" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_4F1B26DA1C413E68E54ED34F1D1BB30A" xlink:to="loc_us-gaap_ProceedsFromRepaymentsOfRestrictedCashFinancingActivities_6D4FC09CB84B1530F7A8D34F1D1C79DF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations" xlink:label="loc_us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations_76B183FD885FB4DED10DD34F1D1C076E" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_4F1B26DA1C413E68E54ED34F1D1BB30A" xlink:to="loc_us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations_76B183FD885FB4DED10DD34F1D1C076E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_9C3C7A74B54B27BD9FE0D34F1D1C3506" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_4F1B26DA1C413E68E54ED34F1D1BB30A" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_9C3C7A74B54B27BD9FE0D34F1D1C3506" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents" xlink:label="loc_us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents_8C79CAABC26CE75754F0D34F1D1C4289" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_229D4B794B2AA39AD544D34F1D141453" xlink:to="loc_us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents_8C79CAABC26CE75754F0D34F1D1C4289" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_A060A50C3353E19592B7D34F1D1CB6A8" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_229D4B794B2AA39AD544D34F1D141453" xlink:to="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_A060A50C3353E19592B7D34F1D1CB6A8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_8092BC129C0FD03741F3D34F1D1CF0B1" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_229D4B794B2AA39AD544D34F1D141453" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_8092BC129C0FD03741F3D34F1D1CF0B1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_C4988908E7584F7C8B96D34F1D1CB978" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_229D4B794B2AA39AD544D34F1D141453" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_C4988908E7584F7C8B96D34F1D1CB978" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SupplementalCashFlowInformationAbstract" xlink:label="loc_us-gaap_SupplementalCashFlowInformationAbstract_BDD38A70EE3CD20261D6D34F1D1C70F5" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_229D4B794B2AA39AD544D34F1D141453" xlink:to="loc_us-gaap_SupplementalCashFlowInformationAbstract_BDD38A70EE3CD20261D6D34F1D1C70F5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestPaid" xlink:label="loc_us-gaap_InterestPaid_C6A8EC3CDE0593617E2AD34F1D1C141C" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SupplementalCashFlowInformationAbstract_BDD38A70EE3CD20261D6D34F1D1C70F5" xlink:to="loc_us-gaap_InterestPaid_C6A8EC3CDE0593617E2AD34F1D1C141C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeTaxesPaidNet" xlink:label="loc_us-gaap_IncomeTaxesPaidNet_6B27E48A9157869BF699D34F1D1C5B70" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SupplementalCashFlowInformationAbstract_BDD38A70EE3CD20261D6D34F1D1C70F5" xlink:to="loc_us-gaap_IncomeTaxesPaidNet_6B27E48A9157869BF699D34F1D1C5B70" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract" xlink:label="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_EC5F209387231189073CD34F1D1C92A7" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_229D4B794B2AA39AD544D34F1D141453" xlink:to="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_EC5F209387231189073CD34F1D1C92A7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockIssued1" xlink:label="loc_us-gaap_StockIssued1_F248D8953CC756A7EBEDD34F1D1CEACA" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_EC5F209387231189073CD34F1D1C92A7" xlink:to="loc_us-gaap_StockIssued1_F248D8953CC756A7EBEDD34F1D1CEACA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CapitalLeaseObligationsIncurred" xlink:label="loc_us-gaap_CapitalLeaseObligationsIncurred_9638737DCB9BE1FC66ECD34F1D1D86B6" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_EC5F209387231189073CD34F1D1C92A7" xlink:to="loc_us-gaap_CapitalLeaseObligationsIncurred_9638737DCB9BE1FC66ECD34F1D1D86B6" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_FairValueOfUnvestedStockOptionsAssumed" xlink:label="loc_mrcy_FairValueOfUnvestedStockOptionsAssumed_D1D56B0C1D3DB468583BD34F1D1DDD31" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_EC5F209387231189073CD34F1D1C92A7" xlink:to="loc_mrcy_FairValueOfUnvestedStockOptionsAssumed_D1D56B0C1D3DB468583BD34F1D1DDD31" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/ConsolidatedStatementsOfOperationsAndComprehensiveLoss" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeStatementAbstract" xlink:label="loc_us-gaap_IncomeStatementAbstract_7257FDF0EFACFD25BE6CD34F1D2B74DC" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues_F11B658014394C2549C3D34F1D2BB684" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_7257FDF0EFACFD25BE6CD34F1D2B74DC" xlink:to="loc_us-gaap_Revenues_F11B658014394C2549C3D34F1D2BB684" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CostOfRevenue" xlink:label="loc_us-gaap_CostOfRevenue_817DC71F4F608AB4C54FD34F1D2CDA90" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_7257FDF0EFACFD25BE6CD34F1D2B74DC" xlink:to="loc_us-gaap_CostOfRevenue_817DC71F4F608AB4C54FD34F1D2CDA90" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_GrossProfit" xlink:label="loc_us-gaap_GrossProfit_1530921A3018581DD965D34F1D2CFD18" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_7257FDF0EFACFD25BE6CD34F1D2B74DC" xlink:to="loc_us-gaap_GrossProfit_1530921A3018581DD965D34F1D2CFD18" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OperatingExpensesAbstract" xlink:label="loc_us-gaap_OperatingExpensesAbstract_7BD7137EC7EA83CC40FDD34F1D2C0E66" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_7257FDF0EFACFD25BE6CD34F1D2B74DC" xlink:to="loc_us-gaap_OperatingExpensesAbstract_7BD7137EC7EA83CC40FDD34F1D2C0E66" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpense" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_C5679F0B48226778808CD34F1D2C4051" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_7BD7137EC7EA83CC40FDD34F1D2C0E66" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_C5679F0B48226778808CD34F1D2C4051" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ResearchAndDevelopmentExpense" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_CE27FA693B7475A4C614D34F1D2CB0A5" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_7BD7137EC7EA83CC40FDD34F1D2C0E66" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpense_CE27FA693B7475A4C614D34F1D2CB0A5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_2B3AF80FBD267C17CEB4D34F1D2C31EF" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_7BD7137EC7EA83CC40FDD34F1D2C0E66" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_2B3AF80FBD267C17CEB4D34F1D2C31EF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RestructuringCharges" xlink:label="loc_us-gaap_RestructuringCharges_61DF732275E635FD16E3D34F1D2C0AE6" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_7BD7137EC7EA83CC40FDD34F1D2C0E66" xlink:to="loc_us-gaap_RestructuringCharges_61DF732275E635FD16E3D34F1D2C0AE6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessCombinationAcquisitionRelatedCosts" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_7DAED1181C98957E0D14D34F1D2C2B06" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_7BD7137EC7EA83CC40FDD34F1D2C0E66" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_7DAED1181C98957E0D14D34F1D2C2B06" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OperatingExpenses" xlink:label="loc_us-gaap_OperatingExpenses_30CBFD1FBBFF462CF2C4D34F1D2C9A89" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_7BD7137EC7EA83CC40FDD34F1D2C0E66" xlink:to="loc_us-gaap_OperatingExpenses_30CBFD1FBBFF462CF2C4D34F1D2C9A89" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_D6F18CF52A98D92325F3D34F1D2CC3AA" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_7257FDF0EFACFD25BE6CD34F1D2B74DC" xlink:to="loc_us-gaap_OperatingIncomeLoss_D6F18CF52A98D92325F3D34F1D2CC3AA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InvestmentIncomeInterest" xlink:label="loc_us-gaap_InvestmentIncomeInterest_754E5F27D3E7B4EE68B3D34F1D2C7E0A" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_7257FDF0EFACFD25BE6CD34F1D2B74DC" xlink:to="loc_us-gaap_InvestmentIncomeInterest_754E5F27D3E7B4EE68B3D34F1D2C7E0A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestExpense" xlink:label="loc_us-gaap_InterestExpense_EE900ECA8279666CFE6CD34F1D2CDD10" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_7257FDF0EFACFD25BE6CD34F1D2B74DC" xlink:to="loc_us-gaap_InterestExpense_EE900ECA8279666CFE6CD34F1D2CDD10" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_B8C122BFDE4AE5FC77D1D34F1D2CC2DD" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_7257FDF0EFACFD25BE6CD34F1D2B74DC" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_B8C122BFDE4AE5FC77D1D34F1D2CC2DD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_808B7709743CFE5DFC8AD34F1D2C9B18" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_7257FDF0EFACFD25BE6CD34F1D2B74DC" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_808B7709743CFE5DFC8AD34F1D2C9B18" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_A9A351942528D76BB16FD34F1D2DA599" xlink:type="locator" />
    <presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_7257FDF0EFACFD25BE6CD34F1D2B74DC" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_A9A351942528D76BB16FD34F1D2DA599" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_65237F17C85ED3865E37D34F1D2D3A39" xlink:type="locator" />
    <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_7257FDF0EFACFD25BE6CD34F1D2B74DC" xlink:to="loc_us-gaap_NetIncomeLoss_65237F17C85ED3865E37D34F1D2D3A39" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsPerBasicShare" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_EE8FC5D1B44E8A38C7D9D34F1D2D989B" xlink:type="locator" />
    <presentationArc order="12" preferredLabel="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_7257FDF0EFACFD25BE6CD34F1D2B74DC" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_EE8FC5D1B44E8A38C7D9D34F1D2D989B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_C1EAE97B528DE6BD310AD34F1D2DABD7" xlink:type="locator" />
    <presentationArc order="13" preferredLabel="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_7257FDF0EFACFD25BE6CD34F1D2B74DC" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_C1EAE97B528DE6BD310AD34F1D2DABD7" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_WeightedAverageNumberBasicAndDilutedSharesOutstandingAbstract" xlink:label="loc_mrcy_WeightedAverageNumberBasicAndDilutedSharesOutstandingAbstract_ABE1971788D99189571BD34F1D2DB932" xlink:type="locator" />
    <presentationArc order="14" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_7257FDF0EFACFD25BE6CD34F1D2B74DC" xlink:to="loc_mrcy_WeightedAverageNumberBasicAndDilutedSharesOutstandingAbstract_ABE1971788D99189571BD34F1D2DB932" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_B6061DAA50F3ED2CC5A5D34F1D2D140D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mrcy_WeightedAverageNumberBasicAndDilutedSharesOutstandingAbstract_ABE1971788D99189571BD34F1D2DB932" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_B6061DAA50F3ED2CC5A5D34F1D2D140D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_CC225999FA4CE3F3AB88D34F1D2D8AB1" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mrcy_WeightedAverageNumberBasicAndDilutedSharesOutstandingAbstract_ABE1971788D99189571BD34F1D2DB932" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_CC225999FA4CE3F3AB88D34F1D2D8AB1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxAbstract" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_33AB1DFE53BB3952230BD34F1D2DC598" xlink:type="locator" />
    <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_7257FDF0EFACFD25BE6CD34F1D2B74DC" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_33AB1DFE53BB3952230BD34F1D2DC598" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_8E331B15672F7D95EC84D34F1D2DD486" xlink:type="locator" />
    <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_33AB1DFE53BB3952230BD34F1D2DC598" xlink:to="loc_us-gaap_NetIncomeLoss_8E331B15672F7D95EC84D34F1D2DD486" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_5AFCA2D7D2F10B32260DD34F1D2D09FE" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_33AB1DFE53BB3952230BD34F1D2DC598" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_5AFCA2D7D2F10B32260DD34F1D2D09FE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_D8940E9327242506CB58D34F1D2D04C9" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_33AB1DFE53BB3952230BD34F1D2DC598" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTax_D8940E9327242506CB58D34F1D2D04C9" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/CustomersComprisingTenPercentOrMoreRevenuesDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_B2740CF8614501EBB8BED278D1C5E774" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable" xlink:label="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_C00B818A7F7019598760D278D1C51787" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_B2740CF8614501EBB8BED278D1C5E774" xlink:to="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_C00B818A7F7019598760D278D1C51787" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_5D36FBEFD4E1E22A0956D278D1C544EC" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_C00B818A7F7019598760D278D1C51787" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_5D36FBEFD4E1E22A0956D278D1C544EC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_559FB628103C9EA7D0C8D278D1C53CE4" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_5D36FBEFD4E1E22A0956D278D1C544EC" xlink:to="loc_us-gaap_SegmentDomain_559FB628103C9EA7D0C8D278D1C53CE4" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_MercuryCommercialElectronicsMember" xlink:label="loc_mrcy_MercuryCommercialElectronicsMember_9ED778F8F68BC51A4F97D278D1C5DA2F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentDomain_559FB628103C9EA7D0C8D278D1C53CE4" xlink:to="loc_mrcy_MercuryCommercialElectronicsMember_9ED778F8F68BC51A4F97D278D1C5DA2F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MajorCustomersAxis" xlink:label="loc_us-gaap_MajorCustomersAxis_7056892758644B3AEA5FD278D1C54C9B" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_C00B818A7F7019598760D278D1C51787" xlink:to="loc_us-gaap_MajorCustomersAxis_7056892758644B3AEA5FD278D1C54C9B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NameOfMajorCustomerDomain" xlink:label="loc_us-gaap_NameOfMajorCustomerDomain_CE3B248B7C0A154E7372D278D1C53C95" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorCustomersAxis_7056892758644B3AEA5FD278D1C54C9B" xlink:to="loc_us-gaap_NameOfMajorCustomerDomain_CE3B248B7C0A154E7372D278D1C53C95" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_CustomerOneMember" xlink:label="loc_mrcy_CustomerOneMember_1D2B4D9F4A995FFF3226D278D1C576E1" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NameOfMajorCustomerDomain_CE3B248B7C0A154E7372D278D1C53C95" xlink:to="loc_mrcy_CustomerOneMember_1D2B4D9F4A995FFF3226D278D1C576E1" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_CustomerTwoMember" xlink:label="loc_mrcy_CustomerTwoMember_7BDDB139C4412312E88CD278D1C5174D" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NameOfMajorCustomerDomain_CE3B248B7C0A154E7372D278D1C53C95" xlink:to="loc_mrcy_CustomerTwoMember_7BDDB139C4412312E88CD278D1C5174D" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_CustomerThreeMember" xlink:label="loc_mrcy_CustomerThreeMember_DA68D37E96BAD0B8C28BD278D1C5638E" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NameOfMajorCustomerDomain_CE3B248B7C0A154E7372D278D1C53C95" xlink:to="loc_mrcy_CustomerThreeMember_DA68D37E96BAD0B8C28BD278D1C5638E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EntityWideRevenueMajorCustomerLineItems" xlink:label="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_EE89290F5BCD6209FA06D278D1C5DFA7" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_C00B818A7F7019598760D278D1C51787" xlink:to="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_EE89290F5BCD6209FA06D278D1C5DFA7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EntityWideRevenueMajorCustomerPercentage" xlink:label="loc_us-gaap_EntityWideRevenueMajorCustomerPercentage_62410C806C1718D633BDD278D1C5DADB" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_EE89290F5BCD6209FA06D278D1C5DFA7" xlink:to="loc_us-gaap_EntityWideRevenueMajorCustomerPercentage_62410C806C1718D633BDD278D1C5DADB" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/CustomersComprisingTenPercentOrMoreRevenuesParentheticalDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_791C31D0344CA2FBFA44D34F1B59E81F" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable" xlink:label="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_5DAB2D0E7F1083CD96F2D34F1B59A2CB" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_791C31D0344CA2FBFA44D34F1B59E81F" xlink:to="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_5DAB2D0E7F1083CD96F2D34F1B59A2CB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_B6B385225270ABCC411FD34F1B5915F6" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_5DAB2D0E7F1083CD96F2D34F1B59A2CB" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_B6B385225270ABCC411FD34F1B5915F6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_C77CF8D6B5558EFF1A12D34F1B591927" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_B6B385225270ABCC411FD34F1B5915F6" xlink:to="loc_us-gaap_SegmentDomain_C77CF8D6B5558EFF1A12D34F1B591927" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_MercuryCommercialElectronicsMember" xlink:label="loc_mrcy_MercuryCommercialElectronicsMember_371BFB39DDEBE1957693D34F1B59A5B4" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentDomain_C77CF8D6B5558EFF1A12D34F1B591927" xlink:to="loc_mrcy_MercuryCommercialElectronicsMember_371BFB39DDEBE1957693D34F1B59A5B4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MajorCustomersAxis" xlink:label="loc_us-gaap_MajorCustomersAxis_E04260EFE77B1C58B79AD34F1B5A3114" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_5DAB2D0E7F1083CD96F2D34F1B59A2CB" xlink:to="loc_us-gaap_MajorCustomersAxis_E04260EFE77B1C58B79AD34F1B5A3114" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NameOfMajorCustomerDomain" xlink:label="loc_us-gaap_NameOfMajorCustomerDomain_D1C81F4023162465DE08D34F1B5ABB34" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorCustomersAxis_E04260EFE77B1C58B79AD34F1B5A3114" xlink:to="loc_us-gaap_NameOfMajorCustomerDomain_D1C81F4023162465DE08D34F1B5ABB34" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_CustomerTwoMember" xlink:label="loc_mrcy_CustomerTwoMember_86CA611370474327A5A7D34F1B5A0D37" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NameOfMajorCustomerDomain_D1C81F4023162465DE08D34F1B5ABB34" xlink:to="loc_mrcy_CustomerTwoMember_86CA611370474327A5A7D34F1B5A0D37" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_FE1BC5C4AC2515ADE24DD34F1B5ADAF5" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_5DAB2D0E7F1083CD96F2D34F1B59A2CB" xlink:to="loc_us-gaap_RangeAxis_FE1BC5C4AC2515ADE24DD34F1B5ADAF5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_4A745CBF67CCC6FDD408D34F1B5A4157" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeAxis_FE1BC5C4AC2515ADE24DD34F1B5ADAF5" xlink:to="loc_us-gaap_RangeMember_4A745CBF67CCC6FDD408D34F1B5A4157" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_6269D34A041795667B0FD34F1B5AEAFC" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_4A745CBF67CCC6FDD408D34F1B5A4157" xlink:to="loc_us-gaap_MaximumMember_6269D34A041795667B0FD34F1B5AEAFC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EntityWideRevenueMajorCustomerLineItems" xlink:label="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_A0177C677999EA766EADD34F1B5A8F81" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_5DAB2D0E7F1083CD96F2D34F1B59A2CB" xlink:to="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_A0177C677999EA766EADD34F1B5A8F81" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EntityWideRevenueMajorCustomerPercentage" xlink:label="loc_us-gaap_EntityWideRevenueMajorCustomerPercentage_C89638AE938A7E0F59E2D34F1B5A221F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_A0177C677999EA766EADD34F1B5A8F81" xlink:to="loc_us-gaap_EntityWideRevenueMajorCustomerPercentage_C89638AE938A7E0F59E2D34F1B5A221F" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_PercentageOfCompanyRevenue" xlink:label="loc_mrcy_PercentageOfCompanyRevenue_BBC601AA498F711640ADD34F1B5AD979" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_A0177C677999EA766EADD34F1B5A8F81" xlink:to="loc_mrcy_PercentageOfCompanyRevenue_BBC601AA498F711640ADD34F1B5AD979" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/Debt" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="loc_us-gaap_DebtDisclosureAbstract_58738D2F1BFBE3306F6A03DFF50B167F" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtDisclosureTextBlock" xlink:label="loc_us-gaap_DebtDisclosureTextBlock_E02A16E3149FDAF897B103DFF50B2DCB" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtDisclosureAbstract_58738D2F1BFBE3306F6A03DFF50B167F" xlink:to="loc_us-gaap_DebtDisclosureTextBlock_E02A16E3149FDAF897B103DFF50B2DCB" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/DebtAdditionalInformationDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="loc_us-gaap_DebtDisclosureAbstract_EFC3F974D9613A53420203DFF5A7094D" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="loc_us-gaap_DebtInstrumentTable_084600005C32FF418EBF03DFF5A7E2F8" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtDisclosureAbstract_EFC3F974D9613A53420203DFF5A7094D" xlink:to="loc_us-gaap_DebtInstrumentTable_084600005C32FF418EBF03DFF5A7E2F8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LineOfCreditFacilityAxis" xlink:label="loc_us-gaap_LineOfCreditFacilityAxis_8CE02374209638EAD6C803DFF5A72AA0" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_084600005C32FF418EBF03DFF5A7E2F8" xlink:to="loc_us-gaap_LineOfCreditFacilityAxis_8CE02374209638EAD6C803DFF5A72AA0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LineOfCreditFacilityLenderDomain" xlink:label="loc_us-gaap_LineOfCreditFacilityLenderDomain_33E1F4BEE78C2726B72803DFF5A7FEF9" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityAxis_8CE02374209638EAD6C803DFF5A72AA0" xlink:to="loc_us-gaap_LineOfCreditFacilityLenderDomain_33E1F4BEE78C2726B72803DFF5A7FEF9" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_SeniorUnsecuredCreditFacilitiesMember" xlink:label="loc_mrcy_SeniorUnsecuredCreditFacilitiesMember_DFF126568CE12659429803DFF5A7366A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityLenderDomain_33E1F4BEE78C2726B72803DFF5A7FEF9" xlink:to="loc_mrcy_SeniorUnsecuredCreditFacilitiesMember_DFF126568CE12659429803DFF5A7366A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="loc_us-gaap_StatementScenarioAxis_B22201CA6BDBCBBB511003DFF5A70DFE" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_084600005C32FF418EBF03DFF5A7E2F8" xlink:to="loc_us-gaap_StatementScenarioAxis_B22201CA6BDBCBBB511003DFF5A70DFE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_D07FB3A276365BBD223603DFF5A729D9" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementScenarioAxis_B22201CA6BDBCBBB511003DFF5A70DFE" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_D07FB3A276365BBD223603DFF5A729D9" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_AcquisitionCovenantsMember" xlink:label="loc_mrcy_AcquisitionCovenantsMember_F18D4DEB16833CFC072603DFF5A776CE" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScenarioUnspecifiedDomain_D07FB3A276365BBD223603DFF5A729D9" xlink:to="loc_mrcy_AcquisitionCovenantsMember_F18D4DEB16833CFC072603DFF5A776CE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CreditFacilityAxis" xlink:label="loc_us-gaap_CreditFacilityAxis_4004AC2CA870F9290A9F03DFF5A741DA" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_084600005C32FF418EBF03DFF5A7E2F8" xlink:to="loc_us-gaap_CreditFacilityAxis_4004AC2CA870F9290A9F03DFF5A741DA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_7265870606DA4C7F908303DFF5A70A8D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CreditFacilityAxis_4004AC2CA870F9290A9F03DFF5A741DA" xlink:to="loc_us-gaap_CreditFacilityDomain_7265870606DA4C7F908303DFF5A70A8D" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_KeyBankCreditFacilityMember" xlink:label="loc_mrcy_KeyBankCreditFacilityMember_79EA857030D514B8C59A03DFF5A86783" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CreditFacilityDomain_7265870606DA4C7F908303DFF5A70A8D" xlink:to="loc_mrcy_KeyBankCreditFacilityMember_79EA857030D514B8C59A03DFF5A86783" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_AE080E81D3CAC4A0783503DFF5A8D706" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_084600005C32FF418EBF03DFF5A7E2F8" xlink:to="loc_us-gaap_RangeAxis_AE080E81D3CAC4A0783503DFF5A8D706" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_4C384B0C4E2CA5116C1C03DFF5A80943" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeAxis_AE080E81D3CAC4A0783503DFF5A8D706" xlink:to="loc_us-gaap_RangeMember_4C384B0C4E2CA5116C1C03DFF5A80943" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_6AC2D7C29C55DF02165103DFF5A8E6E8" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_4C384B0C4E2CA5116C1C03DFF5A80943" xlink:to="loc_us-gaap_MaximumMember_6AC2D7C29C55DF02165103DFF5A8E6E8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_1ED8889F5C36B30F853303DFF5A8C9A5" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_4C384B0C4E2CA5116C1C03DFF5A80943" xlink:to="loc_us-gaap_MinimumMember_1ED8889F5C36B30F853303DFF5A8C9A5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_8118CFACBCDC9AEB277203DFF5A82159" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_084600005C32FF418EBF03DFF5A7E2F8" xlink:to="loc_us-gaap_DebtInstrumentLineItems_8118CFACBCDC9AEB277203DFF5A82159" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_9B26B92DD6659722459503DFF5A85595" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8118CFACBCDC9AEB277203DFF5A82159" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_9B26B92DD6659722459503DFF5A85595" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_DebtInstrumentBorrowingPeriod" xlink:label="loc_mrcy_DebtInstrumentBorrowingPeriod_6C141358927424DC7C6503DFF5A87248" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8118CFACBCDC9AEB277203DFF5A82159" xlink:to="loc_mrcy_DebtInstrumentBorrowingPeriod_6C141358927424DC7C6503DFF5A87248" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_LineOfCreditFacilityPermitsAdditionalBorrowingsAccordionFeature" xlink:label="loc_mrcy_LineOfCreditFacilityPermitsAdditionalBorrowingsAccordionFeature_6BDE4DD7AEE3AB35E48803DFF5A88D67" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8118CFACBCDC9AEB277203DFF5A82159" xlink:to="loc_mrcy_LineOfCreditFacilityPermitsAdditionalBorrowingsAccordionFeature_6BDE4DD7AEE3AB35E48803DFF5A88D67" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_LeverageRatio" xlink:label="loc_mrcy_LeverageRatio_C410844B92796F7F157103DFF5A80F2E" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8118CFACBCDC9AEB277203DFF5A82159" xlink:to="loc_mrcy_LeverageRatio_C410844B92796F7F157103DFF5A80F2E" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_InterestCoverageRatio" xlink:label="loc_mrcy_InterestCoverageRatio_084063B6495844A194D303DFF5A83447" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8118CFACBCDC9AEB277203DFF5A82159" xlink:to="loc_mrcy_InterestCoverageRatio_084063B6495844A194D303DFF5A83447" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_9838E45FA2BEABB264EA03DFF5A85928" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8118CFACBCDC9AEB277203DFF5A82159" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_9838E45FA2BEABB264EA03DFF5A85928" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LineOfCreditFacilityAmountOutstanding" xlink:label="loc_us-gaap_LineOfCreditFacilityAmountOutstanding_E625A2B079DA6030995503DFF5A84EE7" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8118CFACBCDC9AEB277203DFF5A82159" xlink:to="loc_us-gaap_LineOfCreditFacilityAmountOutstanding_E625A2B079DA6030995503DFF5A84EE7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LettersOfCreditOutstandingAmount" xlink:label="loc_us-gaap_LettersOfCreditOutstandingAmount_22E4699D22CF2AC9E67803DFF5A86A62" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8118CFACBCDC9AEB277203DFF5A82159" xlink:to="loc_us-gaap_LettersOfCreditOutstandingAmount_22E4699D22CF2AC9E67803DFF5A86A62" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/DescriptionOfBusiness" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_64D2DCFAB1DC1990AB0B03DFF5F84E08" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NatureOfOperations" xlink:label="loc_us-gaap_NatureOfOperations_E0A6651425A87031309D03DFF5F81709" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_64D2DCFAB1DC1990AB0B03DFF5F84E08" xlink:to="loc_us-gaap_NatureOfOperations_E0A6651425A87031309D03DFF5F81709" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/DescriptionOfBusinessDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_A4F1E4CD3F18D4B3655DD1C91356E136" xlink:type="locator" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_NatureofBusinessNumberofProgramsUsingProductsandServices" xlink:label="loc_mrcy_NatureofBusinessNumberofProgramsUsingProductsandServices_C1BBBF173F78FD91F696D1C9135D8415" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_A4F1E4CD3F18D4B3655DD1C91356E136" xlink:to="loc_mrcy_NatureofBusinessNumberofProgramsUsingProductsandServices_C1BBBF173F78FD91F696D1C9135D8415" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_NatureofBusinessNumberofContractorsUsingProductsandServices" xlink:label="loc_mrcy_NatureofBusinessNumberofContractorsUsingProductsandServices_1D92BE96696C010D43F1D1C9135D60D2" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_A4F1E4CD3F18D4B3655DD1C91356E136" xlink:to="loc_mrcy_NatureofBusinessNumberofContractorsUsingProductsandServices_1D92BE96696C010D43F1D1C9135D60D2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NumberOfOperatingSegments" xlink:label="loc_us-gaap_NumberOfOperatingSegments_4F2B3F374E0A4F4F18EBD1C9384CE896" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_A4F1E4CD3F18D4B3655DD1C91356E136" xlink:to="loc_us-gaap_NumberOfOperatingSegments_4F2B3F374E0A4F4F18EBD1C9384CE896" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/DocumentAndEntityInformation" xlink:type="extended">
    <loc xlink:href="mrcy-20140331.xsd#mrcy_DocumentDocumentandEntityInformationAbstract" xlink:label="loc_mrcy_DocumentDocumentandEntityInformationAbstract_81012D76CA489679588F03DFF5EC3F2A" xlink:type="locator" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_EntitiesTable" xlink:label="loc_dei_EntitiesTable_66E7B31CF8AF94069BDB03DFF5EC427E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mrcy_DocumentDocumentandEntityInformationAbstract_81012D76CA489679588F03DFF5EC3F2A" xlink:to="loc_dei_EntitiesTable_66E7B31CF8AF94069BDB03DFF5EC427E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_701459115A668BFD8EC603DFF5EC24BB" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntitiesTable_66E7B31CF8AF94069BDB03DFF5EC427E" xlink:to="loc_dei_LegalEntityAxis_701459115A668BFD8EC603DFF5EC24BB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_3538B0D753127290443B03DFF5EC6033" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_LegalEntityAxis_701459115A668BFD8EC603DFF5EC24BB" xlink:to="loc_dei_EntityDomain_3538B0D753127290443B03DFF5EC6033" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_DocumentInformationLineItems" xlink:label="loc_dei_DocumentInformationLineItems_EA809D9458A5908C28A003DFF5EC9A43" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntitiesTable_66E7B31CF8AF94069BDB03DFF5EC427E" xlink:to="loc_dei_DocumentInformationLineItems_EA809D9458A5908C28A003DFF5EC9A43" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_DocumentType" xlink:label="loc_dei_DocumentType_E46916B500B632E4212903DFF5EDB65F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_EA809D9458A5908C28A003DFF5EC9A43" xlink:to="loc_dei_DocumentType_E46916B500B632E4212903DFF5EDB65F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_AmendmentFlag" xlink:label="loc_dei_AmendmentFlag_D3428A63C493FFC8635503DFF5EDAF41" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_EA809D9458A5908C28A003DFF5EC9A43" xlink:to="loc_dei_AmendmentFlag_D3428A63C493FFC8635503DFF5EDAF41" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_DocumentPeriodEndDate" xlink:label="loc_dei_DocumentPeriodEndDate_A6FD70159983EDDAF51803DFF5ED372E" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_EA809D9458A5908C28A003DFF5EC9A43" xlink:to="loc_dei_DocumentPeriodEndDate_A6FD70159983EDDAF51803DFF5ED372E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_DocumentFiscalYearFocus" xlink:label="loc_dei_DocumentFiscalYearFocus_AFAC6C6422E39315B7E903DFF5ED5F36" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_EA809D9458A5908C28A003DFF5EC9A43" xlink:to="loc_dei_DocumentFiscalYearFocus_AFAC6C6422E39315B7E903DFF5ED5F36" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_DocumentFiscalPeriodFocus" xlink:label="loc_dei_DocumentFiscalPeriodFocus_355458D745827467D36F03DFF5EDB148" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_EA809D9458A5908C28A003DFF5EC9A43" xlink:to="loc_dei_DocumentFiscalPeriodFocus_355458D745827467D36F03DFF5EDB148" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_TradingSymbol" xlink:label="loc_dei_TradingSymbol_482C03FAB55D6C8D4E7A03DFF5ED54E4" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_EA809D9458A5908C28A003DFF5EC9A43" xlink:to="loc_dei_TradingSymbol_482C03FAB55D6C8D4E7A03DFF5ED54E4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_EntityRegistrantName" xlink:label="loc_dei_EntityRegistrantName_720026A284E366077A4C03DFF5EDA291" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_EA809D9458A5908C28A003DFF5EC9A43" xlink:to="loc_dei_EntityRegistrantName_720026A284E366077A4C03DFF5EDA291" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_EntityCentralIndexKey" xlink:label="loc_dei_EntityCentralIndexKey_3A8329B1A5C467002CFB03DFF5EDB427" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_EA809D9458A5908C28A003DFF5EC9A43" xlink:to="loc_dei_EntityCentralIndexKey_3A8329B1A5C467002CFB03DFF5EDB427" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_CurrentFiscalYearEndDate" xlink:label="loc_dei_CurrentFiscalYearEndDate_242E002804018AC3B0EE03DFF5ED3966" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_EA809D9458A5908C28A003DFF5EC9A43" xlink:to="loc_dei_CurrentFiscalYearEndDate_242E002804018AC3B0EE03DFF5ED3966" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_EntityFilerCategory" xlink:label="loc_dei_EntityFilerCategory_1ED78C76C112519142EF03DFF5ED35DC" xlink:type="locator" />
    <presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_EA809D9458A5908C28A003DFF5EC9A43" xlink:to="loc_dei_EntityFilerCategory_1ED78C76C112519142EF03DFF5ED35DC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_EntityCommonStockSharesOutstanding" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_1CA61260776F0D99238103DFF5EDBF48" xlink:type="locator" />
    <presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_EA809D9458A5908C28A003DFF5EC9A43" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_1CA61260776F0D99238103DFF5EDBF48" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/ExpensesByReportableSegmentForRestructuringPlansDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherIncomeAndExpensesAbstract" xlink:label="loc_us-gaap_OtherIncomeAndExpensesAbstract_F4336418955E2F2FE64CD34F1C2FE0BD" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ComponentOfOtherOperatingCostAndExpenseTable" xlink:label="loc_us-gaap_ComponentOfOtherOperatingCostAndExpenseTable_3A3EB6DD973DD8302E14D34F1C2FCE22" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherIncomeAndExpensesAbstract_F4336418955E2F2FE64CD34F1C2FE0BD" xlink:to="loc_us-gaap_ComponentOfOtherOperatingCostAndExpenseTable_3A3EB6DD973DD8302E14D34F1C2FCE22" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_8AD1189B9BC81690EA58D34F1C2F1798" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ComponentOfOtherOperatingCostAndExpenseTable_3A3EB6DD973DD8302E14D34F1C2FCE22" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_8AD1189B9BC81690EA58D34F1C2F1798" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_C4A5A7ED5BDE745E7B46D34F1C2FF2A1" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_8AD1189B9BC81690EA58D34F1C2F1798" xlink:to="loc_us-gaap_SegmentDomain_C4A5A7ED5BDE745E7B46D34F1C2FF2A1" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_MercuryCommercialElectronicsMember" xlink:label="loc_mrcy_MercuryCommercialElectronicsMember_4133F8B88C50F49B4E1FD34F1C2F5735" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentDomain_C4A5A7ED5BDE745E7B46D34F1C2FF2A1" xlink:to="loc_mrcy_MercuryCommercialElectronicsMember_4133F8B88C50F49B4E1FD34F1C2F5735" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_MercuryDefenseAndIntelligenceSystemsMember" xlink:label="loc_mrcy_MercuryDefenseAndIntelligenceSystemsMember_80CA102BDFDF966E0A42D34F1C2F9AA4" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentDomain_C4A5A7ED5BDE745E7B46D34F1C2FF2A1" xlink:to="loc_mrcy_MercuryDefenseAndIntelligenceSystemsMember_80CA102BDFDF966E0A42D34F1C2F9AA4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="loc_us-gaap_StatementScenarioAxis_361544045DCBF21FC7D0D34F1C2FC916" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ComponentOfOtherOperatingCostAndExpenseTable_3A3EB6DD973DD8302E14D34F1C2FCE22" xlink:to="loc_us-gaap_StatementScenarioAxis_361544045DCBF21FC7D0D34F1C2FC916" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_9961FE56F50183208601D34F1C2F3760" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementScenarioAxis_361544045DCBF21FC7D0D34F1C2FC916" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_9961FE56F50183208601D34F1C2F3760" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_SeveranceMember" xlink:label="loc_mrcy_SeveranceMember_4800A948F1CC40F63EA9D34F1C2FC46F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScenarioUnspecifiedDomain_9961FE56F50183208601D34F1C2F3760" xlink:to="loc_mrcy_SeveranceMember_4800A948F1CC40F63EA9D34F1C2FC46F" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_FacilitiesAndOtherMember" xlink:label="loc_mrcy_FacilitiesAndOtherMember_4CDB3B232E28AEA6E639D34F1C3058F9" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScenarioUnspecifiedDomain_9961FE56F50183208601D34F1C2F3760" xlink:to="loc_mrcy_FacilitiesAndOtherMember_4CDB3B232E28AEA6E639D34F1C3058F9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ComponentOfOperatingOtherCostAndExpenseLineItems" xlink:label="loc_us-gaap_ComponentOfOperatingOtherCostAndExpenseLineItems_B112B7B44FF5242B506ED34F1C304B68" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ComponentOfOtherOperatingCostAndExpenseTable_3A3EB6DD973DD8302E14D34F1C2FCE22" xlink:to="loc_us-gaap_ComponentOfOperatingOtherCostAndExpenseLineItems_B112B7B44FF5242B506ED34F1C304B68" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RestructuringSettlementAndImpairmentProvisions" xlink:label="loc_us-gaap_RestructuringSettlementAndImpairmentProvisions_C3F851CA5D86901E51FAD34F1C30FBE6" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ComponentOfOperatingOtherCostAndExpenseLineItems_B112B7B44FF5242B506ED34F1C304B68" xlink:to="loc_us-gaap_RestructuringSettlementAndImpairmentProvisions_C3F851CA5D86901E51FAD34F1C30FBE6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RestructuringReserveRollForward" xlink:label="loc_us-gaap_RestructuringReserveRollForward_DDB7CA648AE0B1A3E0B2D34F1C30396E" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ComponentOfOperatingOtherCostAndExpenseLineItems_B112B7B44FF5242B506ED34F1C304B68" xlink:to="loc_us-gaap_RestructuringReserveRollForward_DDB7CA648AE0B1A3E0B2D34F1C30396E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RestructuringReserveCurrent" xlink:label="loc_us-gaap_RestructuringReserveCurrent_AE3809D682A2AA32D70BD34F1C30BC97" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RestructuringReserveRollForward_DDB7CA648AE0B1A3E0B2D34F1C30396E" xlink:to="loc_us-gaap_RestructuringReserveCurrent_AE3809D682A2AA32D70BD34F1C30BC97" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsForRestructuring" xlink:label="loc_us-gaap_PaymentsForRestructuring_61287D2174C3CCE6CBEFD34F1C30F6BC" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RestructuringReserveRollForward_DDB7CA648AE0B1A3E0B2D34F1C30396E" xlink:to="loc_us-gaap_PaymentsForRestructuring_61287D2174C3CCE6CBEFD34F1C30F6BC" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_RestructuringExpenseReversal" xlink:label="loc_mrcy_RestructuringExpenseReversal_BB739E8208814A910AC3D34F1C3031BE" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RestructuringReserveRollForward_DDB7CA648AE0B1A3E0B2D34F1C30396E" xlink:to="loc_mrcy_RestructuringExpenseReversal_BB739E8208814A910AC3D34F1C3031BE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RestructuringReserveCurrent" xlink:label="loc_us-gaap_RestructuringReserveCurrent_A784EB1CEFB02A74DCF3D34F1C30EF5D" xlink:type="locator" />
    <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_DDB7CA648AE0B1A3E0B2D34F1C30396E" xlink:to="loc_us-gaap_RestructuringReserveCurrent_A784EB1CEFB02A74DCF3D34F1C30EF5D" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/FairValueOfFinancialInstruments" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract_B72337E915A1F2DD068203DFF5AD0EBB" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueDisclosuresTextBlock" xlink:label="loc_us-gaap_FairValueDisclosuresTextBlock_9A409597A84B97A662FA03DFF5ADC565" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_B72337E915A1F2DD068203DFF5AD0EBB" xlink:to="loc_us-gaap_FairValueDisclosuresTextBlock_9A409597A84B97A662FA03DFF5ADC565" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/FairValueOfFinancialInstrumentsTables" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract_10C41A94BD961D01F3E603DFF4F2451D" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock_FCEFB384F1635D837AB703DFF4F28287" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_10C41A94BD961D01F3E603DFF4F2451D" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock_FCEFB384F1635D837AB703DFF4F28287" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/GeographicDistributionOfRevenuesAndLongLivedAssetsFromContinuingOperationsDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_BA678BE017D096085B6D03DFF51EF20C" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable" xlink:label="loc_us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable_445045AD4BB0367C36E003DFF51E699F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_BA678BE017D096085B6D03DFF51EF20C" xlink:to="loc_us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable_445045AD4BB0367C36E003DFF51E699F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementGeographicalAxis" xlink:label="loc_us-gaap_StatementGeographicalAxis_13EF9BFF3A72D30AD90303DFF51ED3D6" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable_445045AD4BB0367C36E003DFF51E699F" xlink:to="loc_us-gaap_StatementGeographicalAxis_13EF9BFF3A72D30AD90303DFF51ED3D6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_81B31E75943FF642FB8A03DFF51E99C5" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementGeographicalAxis_13EF9BFF3A72D30AD90303DFF51ED3D6" xlink:to="loc_us-gaap_SegmentGeographicalDomain_81B31E75943FF642FB8A03DFF51E99C5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/country/2012/country-2012-01-31.xsd#country_US" xlink:label="loc_country_US_7E04696C3DA600CC13C103DFF51FAF75" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentGeographicalDomain_81B31E75943FF642FB8A03DFF51E99C5" xlink:to="loc_country_US_7E04696C3DA600CC13C103DFF51FAF75" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_EuropeMember" xlink:label="loc_mrcy_EuropeMember_FA26A1455B05AAC100DA03DFF51F9D4B" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentGeographicalDomain_81B31E75943FF642FB8A03DFF51E99C5" xlink:to="loc_mrcy_EuropeMember_FA26A1455B05AAC100DA03DFF51F9D4B" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_AsiaPacificMember" xlink:label="loc_mrcy_AsiaPacificMember_296AD8F647A9D15DD80A03DFF51F4295" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentGeographicalDomain_81B31E75943FF642FB8A03DFF51E99C5" xlink:to="loc_mrcy_AsiaPacificMember_296AD8F647A9D15DD80A03DFF51F4295" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_GeographicalIntersegmentEliminationsMember" xlink:label="loc_us-gaap_GeographicalIntersegmentEliminationsMember_1D506582C4940A7F6D2003DFF51FAC50" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentGeographicalDomain_81B31E75943FF642FB8A03DFF51E99C5" xlink:to="loc_us-gaap_GeographicalIntersegmentEliminationsMember_1D506582C4940A7F6D2003DFF51FAC50" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SegmentReportingRevenueReconcilingItemLineItems" xlink:label="loc_us-gaap_SegmentReportingRevenueReconcilingItemLineItems_8154FE9B697426DA99EE03DFF51F8350" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable_445045AD4BB0367C36E003DFF51E699F" xlink:to="loc_us-gaap_SegmentReportingRevenueReconcilingItemLineItems_8154FE9B697426DA99EE03DFF51F8350" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_EntityWideDisclosureOnGeographicAreasRevenueFromExternalCustomersAttributedToIndividualForeignCountries" xlink:label="loc_mrcy_EntityWideDisclosureOnGeographicAreasRevenueFromExternalCustomersAttributedToIndividualForeignCountries_2E72ECBDB5C38855E6B403DFF51F5DA8" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingRevenueReconcilingItemLineItems_8154FE9B697426DA99EE03DFF51F8350" xlink:to="loc_mrcy_EntityWideDisclosureOnGeographicAreasRevenueFromExternalCustomersAttributedToIndividualForeignCountries_2E72ECBDB5C38855E6B403DFF51F5DA8" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_RevenuesFromTransactionsWithOtherGeographicLocationsOfSameEntity" xlink:label="loc_mrcy_RevenuesFromTransactionsWithOtherGeographicLocationsOfSameEntity_2E3B3D0701326FC07AEB03DFF51F49D8" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingRevenueReconcilingItemLineItems_8154FE9B697426DA99EE03DFF51F8350" xlink:to="loc_mrcy_RevenuesFromTransactionsWithOtherGeographicLocationsOfSameEntity_2E3B3D0701326FC07AEB03DFF51F49D8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues_8F3B4B50EA5495A1979903DFF51F65E2" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingRevenueReconcilingItemLineItems_8154FE9B697426DA99EE03DFF51F8350" xlink:to="loc_us-gaap_Revenues_8F3B4B50EA5495A1979903DFF51F65E2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EntityWideDisclosureOnGeographicAreasLongLivedAssetsInEntitysCountryOfDomicile" xlink:label="loc_us-gaap_EntityWideDisclosureOnGeographicAreasLongLivedAssetsInEntitysCountryOfDomicile_5FDDE4863831B11F185F03DFF51FCD45" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingRevenueReconcilingItemLineItems_8154FE9B697426DA99EE03DFF51F8350" xlink:to="loc_us-gaap_EntityWideDisclosureOnGeographicAreasLongLivedAssetsInEntitysCountryOfDomicile_5FDDE4863831B11F185F03DFF51FCD45" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/Goodwill" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_FC2EF5238E1C0C23EF1D03DFF5E3337F" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_GoodwillDisclosureTextBlock" xlink:label="loc_us-gaap_GoodwillDisclosureTextBlock_266A360387877D0B1C7A03DFF5E34FD5" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_FC2EF5238E1C0C23EF1D03DFF5E3337F" xlink:to="loc_us-gaap_GoodwillDisclosureTextBlock_266A360387877D0B1C7A03DFF5E34FD5" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/GoodwillAdditionalInformationDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_FBB5AB23FEC42B997788D34D21B88D02" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_GoodwillPurchaseAccountingAdjustments" xlink:label="loc_us-gaap_GoodwillPurchaseAccountingAdjustments_9BA4E21238F6C747396AD34D24D38B9A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_FBB5AB23FEC42B997788D34D21B88D02" xlink:to="loc_us-gaap_GoodwillPurchaseAccountingAdjustments_9BA4E21238F6C747396AD34D24D38B9A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_GoodwillSubsequentRecognitionOfDeferredTaxAsset" xlink:label="loc_us-gaap_GoodwillSubsequentRecognitionOfDeferredTaxAsset_746E4FA6A4CD9A0DF5ACD36BDF60B63E" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_FBB5AB23FEC42B997788D34D21B88D02" xlink:to="loc_us-gaap_GoodwillSubsequentRecognitionOfDeferredTaxAsset_746E4FA6A4CD9A0DF5ACD36BDF60B63E" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/GoodwillTables" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_79EAF1636DF4282A779203DFF508C1CE" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfGoodwillTextBlock" xlink:label="loc_us-gaap_ScheduleOfGoodwillTextBlock_9E739BC2542747E54C1A03DFF5087F23" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_79EAF1636DF4282A779203DFF508C1CE" xlink:to="loc_us-gaap_ScheduleOfGoodwillTextBlock_9E739BC2542747E54C1A03DFF5087F23" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/IncomeTaxes" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="loc_us-gaap_IncomeTaxDisclosureAbstract_15381DE7B80234FAACA903DFF557D417" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeTaxDisclosureTextBlock" xlink:label="loc_us-gaap_IncomeTaxDisclosureTextBlock_35B94F58E367514591DC03DFF5585567" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_15381DE7B80234FAACA903DFF557D417" xlink:to="loc_us-gaap_IncomeTaxDisclosureTextBlock_35B94F58E367514591DC03DFF5585567" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/IncomeTaxesAdditionalInformationDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="loc_us-gaap_IncomeTaxDisclosureAbstract_D155BFDD5BDCC8F970D603DFF5F186BA" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_8E3325DD75DEC818A94503DFF5F1D389" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_D155BFDD5BDCC8F970D603DFF5F186BA" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_8E3325DD75DEC818A94503DFF5F1D389" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_A9A3628286522D5714F203DFF5F1F9D5" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_D155BFDD5BDCC8F970D603DFF5F186BA" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_A9A3628286522D5714F203DFF5F1F9D5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ImmaterialErrorCorrection" xlink:label="loc_us-gaap_ImmaterialErrorCorrection_3E4CF5BB989F854D96A403DFF5F1B40D" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_D155BFDD5BDCC8F970D603DFF5F186BA" xlink:to="loc_us-gaap_ImmaterialErrorCorrection_3E4CF5BB989F854D96A403DFF5F1B40D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit" xlink:label="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit_E6EB6D8609230F7168AB03DFF5F1DFA6" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_D155BFDD5BDCC8F970D603DFF5F186BA" xlink:to="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit_E6EB6D8609230F7168AB03DFF5F1DFA6" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/Inventory" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InventoryDisclosureAbstract" xlink:label="loc_us-gaap_InventoryDisclosureAbstract_C0043090C9A02FF9673003DFF5B507C1" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InventoryDisclosureTextBlock" xlink:label="loc_us-gaap_InventoryDisclosureTextBlock_CB321F8019E62CDFDD7E03DFF5B58E21" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryDisclosureAbstract_C0043090C9A02FF9673003DFF5B507C1" xlink:to="loc_us-gaap_InventoryDisclosureTextBlock_CB321F8019E62CDFDD7E03DFF5B58E21" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/InventoryAdditionalInformationDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InventoryDisclosureAbstract" xlink:label="loc_us-gaap_InventoryDisclosureAbstract_FD181D8ED6B40D73D1D903DFF506BC33" xlink:type="locator" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_ScheduleOfInventoryTable" xlink:label="loc_mrcy_ScheduleOfInventoryTable_1691AFD47531E6C5F01D03DFF506D6EA" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryDisclosureAbstract_FD181D8ED6B40D73D1D903DFF506BC33" xlink:to="loc_mrcy_ScheduleOfInventoryTable_1691AFD47531E6C5F01D03DFF506D6EA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProductOrServiceAxis" xlink:label="loc_us-gaap_ProductOrServiceAxis_AA9CAC4B36B5E8E9DC3F03DFF50625CA" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mrcy_ScheduleOfInventoryTable_1691AFD47531E6C5F01D03DFF506D6EA" xlink:to="loc_us-gaap_ProductOrServiceAxis_AA9CAC4B36B5E8E9DC3F03DFF50625CA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProductsAndServicesDomain" xlink:label="loc_us-gaap_ProductsAndServicesDomain_1E2E3CE72E57340F79E603DFF506CC58" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ProductOrServiceAxis_AA9CAC4B36B5E8E9DC3F03DFF50625CA" xlink:to="loc_us-gaap_ProductsAndServicesDomain_1E2E3CE72E57340F79E603DFF506CC58" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProductMember" xlink:label="loc_us-gaap_ProductMember_1C2B9556D4A7DC92F76F03DFF5066CB8" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ProductsAndServicesDomain_1E2E3CE72E57340F79E603DFF506CC58" xlink:to="loc_us-gaap_ProductMember_1C2B9556D4A7DC92F76F03DFF5066CB8" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_ScheduleOfInventoryLineItems" xlink:label="loc_mrcy_ScheduleOfInventoryLineItems_435BABF8856A678E1F3703DFF506CABD" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mrcy_ScheduleOfInventoryTable_1691AFD47531E6C5F01D03DFF506D6EA" xlink:to="loc_mrcy_ScheduleOfInventoryLineItems_435BABF8856A678E1F3703DFF506CABD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInInventories" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_750C8E63CE2BCE2BFB0103DFF506C2FD" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mrcy_ScheduleOfInventoryLineItems_435BABF8856A678E1F3703DFF506CABD" xlink:to="loc_us-gaap_IncreaseDecreaseInInventories_750C8E63CE2BCE2BFB0103DFF506C2FD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InventoryForLongTermContractsOrPrograms" xlink:label="loc_us-gaap_InventoryForLongTermContractsOrPrograms_6ABAB144076AA9D2E45303DFF5077CCB" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mrcy_ScheduleOfInventoryLineItems_435BABF8856A678E1F3703DFF506CABD" xlink:to="loc_us-gaap_InventoryForLongTermContractsOrPrograms_6ABAB144076AA9D2E45303DFF5077CCB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OperatingCycle" xlink:label="loc_us-gaap_OperatingCycle_56FABC87EFCAAC47202D03DFF5076304" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mrcy_ScheduleOfInventoryLineItems_435BABF8856A678E1F3703DFF506CABD" xlink:to="loc_us-gaap_OperatingCycle_56FABC87EFCAAC47202D03DFF5076304" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/InventoryDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InventoryDisclosureAbstract" xlink:label="loc_us-gaap_InventoryDisclosureAbstract_3C0F31CCD7875A2CF63503DFF5022BC4" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InventoryRawMaterialsNetOfReserves" xlink:label="loc_us-gaap_InventoryRawMaterialsNetOfReserves_049C202A0A592CC5D32803DFF503FD3A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryDisclosureAbstract_3C0F31CCD7875A2CF63503DFF5022BC4" xlink:to="loc_us-gaap_InventoryRawMaterialsNetOfReserves_049C202A0A592CC5D32803DFF503FD3A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InventoryWorkInProcessNetOfReserves" xlink:label="loc_us-gaap_InventoryWorkInProcessNetOfReserves_77C7984B8E6C5BBBDA0603DFF5031879" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryDisclosureAbstract_3C0F31CCD7875A2CF63503DFF5022BC4" xlink:to="loc_us-gaap_InventoryWorkInProcessNetOfReserves_77C7984B8E6C5BBBDA0603DFF5031879" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InventoryFinishedGoodsNetOfReserves" xlink:label="loc_us-gaap_InventoryFinishedGoodsNetOfReserves_ED04274FA38FFFE5CD3303DFF503CB13" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryDisclosureAbstract_3C0F31CCD7875A2CF63503DFF5022BC4" xlink:to="loc_us-gaap_InventoryFinishedGoodsNetOfReserves_ED04274FA38FFFE5CD3303DFF503CB13" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InventoryNet" xlink:label="loc_us-gaap_InventoryNet_2663229DD2737C09DB8303DFF503D22F" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryDisclosureAbstract_3C0F31CCD7875A2CF63503DFF5022BC4" xlink:to="loc_us-gaap_InventoryNet_2663229DD2737C09DB8303DFF503D22F" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/InventoryTables" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InventoryDisclosureAbstract" xlink:label="loc_us-gaap_InventoryDisclosureAbstract_80F0B0E3B2B69DA54C4703DFF55C223F" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfInventoryCurrentTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfInventoryCurrentTableTextBlock_BE76FE5E147C415EF14F03DFF55C4528" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryDisclosureAbstract_80F0B0E3B2B69DA54C4703DFF55C223F" xlink:to="loc_us-gaap_ScheduleOfInventoryCurrentTableTextBlock_BE76FE5E147C415EF14F03DFF55C4528" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/OperatingSegmentGeographicInformationAndSignificantCustomers" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_0A31DA895E5586DF425103DFF555965D" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SegmentReportingDisclosureTextBlock" xlink:label="loc_us-gaap_SegmentReportingDisclosureTextBlock_8B005E58762271E5CDC803DFF555E995" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_0A31DA895E5586DF425103DFF555965D" xlink:to="loc_us-gaap_SegmentReportingDisclosureTextBlock_8B005E58762271E5CDC803DFF555E995" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/OperatingSegmentGeographicInformationAndSignificantCustomersAdditionalInformationDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_E51C55DA066B4860152ED35BB4E8A89B" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NumberOfOperatingSegments" xlink:label="loc_us-gaap_NumberOfOperatingSegments_810963AA0F61438D617AD35BB4EB5511" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_E51C55DA066B4860152ED35BB4E8A89B" xlink:to="loc_us-gaap_NumberOfOperatingSegments_810963AA0F61438D617AD35BB4EB5511" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/OperatingSegmentGeographicInformationAndSignificantCustomersTables" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_516F3F8C240A0B8892A703DFF4E08D46" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_D187DC680B74D137C17703DFF4E0C626" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_516F3F8C240A0B8892A703DFF4E08D46" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_D187DC680B74D137C17703DFF4E0C626" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_ScheduleOfReconciliationOfNetIncomeTableTextBlock" xlink:label="loc_mrcy_ScheduleOfReconciliationOfNetIncomeTableTextBlock_D0FE2CB3C70BBBF2ED7603DFF4E0D085" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_516F3F8C240A0B8892A703DFF4E08D46" xlink:to="loc_mrcy_ScheduleOfReconciliationOfNetIncomeTableTextBlock_D0FE2CB3C70BBBF2ED7603DFF4E0D085" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock_155F8F72B882224F493903DFF4E00BCF" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_516F3F8C240A0B8892A703DFF4E08D46" xlink:to="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock_155F8F72B882224F493903DFF4E00BCF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfRevenueByMajorCustomersByReportingSegmentsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfRevenueByMajorCustomersByReportingSegmentsTableTextBlock_7BE4AEE2245B32C094F003DFF4E05009" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_516F3F8C240A0B8892A703DFF4E08D46" xlink:to="loc_us-gaap_ScheduleOfRevenueByMajorCustomersByReportingSegmentsTableTextBlock_7BE4AEE2245B32C094F003DFF4E05009" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/ProgramsComprisingTenPercentOrMoreOfCompanysRevenueDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_0C0D7A9A4FECE12D3D36904A377F8684" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_F94E24EFC23362870065904A377F18F9" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_0C0D7A9A4FECE12D3D36904A377F8684" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_F94E24EFC23362870065904A377F18F9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ConcentrationRiskByTypeAxis" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_D8C96704B92522454B3E904A377F0538" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_F94E24EFC23362870065904A377F18F9" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_D8C96704B92522454B3E904A377F0538" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_32AA88E9FEA48B415E9F904A377FFE51" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_D8C96704B92522454B3E904A377F0538" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_32AA88E9FEA48B415E9F904A377FFE51" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_ProgramOneMember" xlink:label="loc_mrcy_ProgramOneMember_686E34046D0D0099B41F904A3780B99B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_32AA88E9FEA48B415E9F904A377FFE51" xlink:to="loc_mrcy_ProgramOneMember_686E34046D0D0099B41F904A3780B99B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_BF307B7187F7437469B0904A3780ABF6" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_F94E24EFC23362870065904A377F18F9" xlink:to="loc_us-gaap_SegmentReportingInformationLineItems_BF307B7187F7437469B0904A3780ABF6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ConcentrationRiskPercentage1" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_6E75FDF21F190D2A4881904A3780A7AF" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_BF307B7187F7437469B0904A3780ABF6" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_6E75FDF21F190D2A4881904A3780A7AF" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/ReconcilesNetIncomeLossMostDirectlyComparableGaapFinancialMeasureToAdjustedEbitdaDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_146CFC0302D84E2EB6F3D34F1B83E8CF" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_C4F609B6F25A8F0247A0D34F1B83F5E0" xlink:type="locator" />
    <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_SegmentReportingAbstract_146CFC0302D84E2EB6F3D34F1B83E8CF" xlink:to="loc_us-gaap_NetIncomeLoss_C4F609B6F25A8F0247A0D34F1B83F5E0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestIncomeExpenseNet" xlink:label="loc_us-gaap_InterestIncomeExpenseNet_3618EF6198DAC7905271D34F1B838E5A" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_146CFC0302D84E2EB6F3D34F1B83E8CF" xlink:to="loc_us-gaap_InterestIncomeExpenseNet_3618EF6198DAC7905271D34F1B838E5A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_A055301893F0A07B3A9FD34F1B839722" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_146CFC0302D84E2EB6F3D34F1B83E8CF" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_A055301893F0A07B3A9FD34F1B839722" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Depreciation" xlink:label="loc_us-gaap_Depreciation_58EEFC0A158C3BE417F1D34F1B84370C" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_146CFC0302D84E2EB6F3D34F1B83E8CF" xlink:to="loc_us-gaap_Depreciation_58EEFC0A158C3BE417F1D34F1B84370C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AmortizationOfAcquiredIntangibleAssets" xlink:label="loc_us-gaap_AmortizationOfAcquiredIntangibleAssets_F4F068788F8D25750C8FD34F1B84F731" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_146CFC0302D84E2EB6F3D34F1B83E8CF" xlink:to="loc_us-gaap_AmortizationOfAcquiredIntangibleAssets_F4F068788F8D25750C8FD34F1B84F731" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RestructuringCharges" xlink:label="loc_us-gaap_RestructuringCharges_AF9E76388CBBB28B2DF3D34F1B8492E8" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_146CFC0302D84E2EB6F3D34F1B83E8CF" xlink:to="loc_us-gaap_RestructuringCharges_AF9E76388CBBB28B2DF3D34F1B8492E8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessCombinationAcquisitionRelatedCosts" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_871EA2FC454A9E522DF6D34F1B845295" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_146CFC0302D84E2EB6F3D34F1B83E8CF" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_871EA2FC454A9E522DF6D34F1B845295" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_FairValueAdjustmentsFromPurchaseAccounting" xlink:label="loc_mrcy_FairValueAdjustmentsFromPurchaseAccounting_547CEFFA60931A63F563D34F1B846EE5" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_146CFC0302D84E2EB6F3D34F1B83E8CF" xlink:to="loc_mrcy_FairValueAdjustmentsFromPurchaseAccounting_547CEFFA60931A63F563D34F1B846EE5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_us-gaap_ShareBasedCompensation_27FE0FA29677C6D5EE8ED34F1B843F6F" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_146CFC0302D84E2EB6F3D34F1B83E8CF" xlink:to="loc_us-gaap_ShareBasedCompensation_27FE0FA29677C6D5EE8ED34F1B843F6F" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization" xlink:label="loc_mrcy_AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization_06FC6826FAEACB9FF595D34F1B846C3F" xlink:type="locator" />
    <presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_146CFC0302D84E2EB6F3D34F1B83E8CF" xlink:to="loc_mrcy_AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization_06FC6826FAEACB9FF595D34F1B846C3F" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/RestructuringPlan" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RestructuringAndRelatedActivitiesAbstract" xlink:label="loc_us-gaap_RestructuringAndRelatedActivitiesAbstract_70EF5F1C5EB0C30416AB03DFF5BD9FA8" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock" xlink:label="loc_us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock_3EC340C4D0C8B9D41D0603DFF5BDB5F3" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RestructuringAndRelatedActivitiesAbstract_70EF5F1C5EB0C30416AB03DFF5BD9FA8" xlink:to="loc_us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock_3EC340C4D0C8B9D41D0603DFF5BDB5F3" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/RestructuringPlanAdditionalInformationDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherIncomeAndExpensesAbstract" xlink:label="loc_us-gaap_OtherIncomeAndExpensesAbstract_601E0364CDD50BFDC749D34F1C396CDD" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_78323C3229326D8E5478D34F1C3A2F4C" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherIncomeAndExpensesAbstract_601E0364CDD50BFDC749D34F1C396CDD" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_78323C3229326D8E5478D34F1C3A2F4C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_503F7640395D8675FFE5D34F1C3A61A4" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_78323C3229326D8E5478D34F1C3A2F4C" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_503F7640395D8675FFE5D34F1C3A61A4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_A9EEB528057516958DE4D34F1C3A1251" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_503F7640395D8675FFE5D34F1C3A61A4" xlink:to="loc_us-gaap_SegmentDomain_A9EEB528057516958DE4D34F1C3A1251" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_MercuryCommercialElectronicsMember" xlink:label="loc_mrcy_MercuryCommercialElectronicsMember_411A53FAA0F96CF8F0E0D34F1C3AECB4" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentDomain_A9EEB528057516958DE4D34F1C3A1251" xlink:to="loc_mrcy_MercuryCommercialElectronicsMember_411A53FAA0F96CF8F0E0D34F1C3AECB4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RestructuringCostAndReserveLineItems" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_9915AA3BEE464939E204D34F1C3B4B92" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_78323C3229326D8E5478D34F1C3A2F4C" xlink:to="loc_us-gaap_RestructuringCostAndReserveLineItems_9915AA3BEE464939E204D34F1C3B4B92" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminated" xlink:label="loc_us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminated_6D586A2E10E8CD7A1AB4D34F1C3BF6B8" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_9915AA3BEE464939E204D34F1C3B4B92" xlink:to="loc_us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminated_6D586A2E10E8CD7A1AB4D34F1C3BF6B8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RestructuringCharges" xlink:label="loc_us-gaap_RestructuringCharges_EA0797F979AA42757B4CD34F1C4053FB" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/positiveLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_9915AA3BEE464939E204D34F1C3B4B92" xlink:to="loc_us-gaap_RestructuringCharges_EA0797F979AA42757B4CD34F1C4053FB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RestructuringAndRelatedCostExpectedCost" xlink:label="loc_us-gaap_RestructuringAndRelatedCostExpectedCost_AC9351CB85253C610961D34F1C40F1CC" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_9915AA3BEE464939E204D34F1C3B4B92" xlink:to="loc_us-gaap_RestructuringAndRelatedCostExpectedCost_AC9351CB85253C610961D34F1C40F1CC" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/RestructuringPlanTables" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RestructuringAndRelatedActivitiesAbstract" xlink:label="loc_us-gaap_RestructuringAndRelatedActivitiesAbstract_41768E2BE4E21B802E8903DFF5B68A1D" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfRestructuringReserveByTypeOfCostTextBlock" xlink:label="loc_us-gaap_ScheduleOfRestructuringReserveByTypeOfCostTextBlock_8D4495A9A34B773087D703DFF5B6E8A6" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RestructuringAndRelatedActivitiesAbstract_41768E2BE4E21B802E8903DFF5B68A1D" xlink:to="loc_us-gaap_ScheduleOfRestructuringReserveByTypeOfCostTextBlock_8D4495A9A34B773087D703DFF5B6E8A6" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/StockBasedCompensation" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_1B8635554B9088B878C903DFF5DD2A6A" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_540BA7337B376BF0548003DFF5DDC8CF" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_1B8635554B9088B878C903DFF5DD2A6A" xlink:to="loc_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_540BA7337B376BF0548003DFF5DDC8CF" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/StockBasedCompensationAdditionalInformationDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_6CE4F054E62C8A2E2B2E03DFF53089B6" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_9864B1DF422A2127A20903DFF5307892" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_6CE4F054E62C8A2E2B2E03DFF53089B6" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_9864B1DF422A2127A20903DFF5307892" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PlanNameAxis" xlink:label="loc_us-gaap_PlanNameAxis_ED58216C0F34CD19621403DFF5308FCD" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_9864B1DF422A2127A20903DFF5307892" xlink:to="loc_us-gaap_PlanNameAxis_ED58216C0F34CD19621403DFF5308FCD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PlanNameDomain" xlink:label="loc_us-gaap_PlanNameDomain_3045C73C81DFEF6549CF03DFF5305E9D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PlanNameAxis_ED58216C0F34CD19621403DFF5308FCD" xlink:to="loc_us-gaap_PlanNameDomain_3045C73C81DFEF6549CF03DFF5305E9D" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_StockOptionPlanTwentyZeroFiveMember" xlink:label="loc_mrcy_StockOptionPlanTwentyZeroFiveMember_38AE8BB3C908D29FAA9603DFF531D4D3" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PlanNameDomain_3045C73C81DFEF6549CF03DFF5305E9D" xlink:to="loc_mrcy_StockOptionPlanTwentyZeroFiveMember_38AE8BB3C908D29FAA9603DFF531D4D3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_2FF039463F13E464702003DFF531E7A5" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_9864B1DF422A2127A20903DFF5307892" xlink:to="loc_us-gaap_AwardTypeAxis_2FF039463F13E464702003DFF531E7A5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8D187917C98DBF0BD62203DFF531CC0A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AwardTypeAxis_2FF039463F13E464702003DFF531E7A5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8D187917C98DBF0BD62203DFF531CC0A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EmployeeStockMember" xlink:label="loc_us-gaap_EmployeeStockMember_3A9B9A9187C0210A850E03DFF531F39B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8D187917C98DBF0BD62203DFF531CC0A" xlink:to="loc_us-gaap_EmployeeStockMember_3A9B9A9187C0210A850E03DFF531F39B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RestrictedStockMember" xlink:label="loc_us-gaap_RestrictedStockMember_29C2091E19BC5F4D9FA503DFF5318DFE" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8D187917C98DBF0BD62203DFF531CC0A" xlink:to="loc_us-gaap_RestrictedStockMember_29C2091E19BC5F4D9FA503DFF5318DFE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_7BF978AAB39BC606A21A03DFF531DB98" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_9864B1DF422A2127A20903DFF5307892" xlink:to="loc_us-gaap_RangeAxis_7BF978AAB39BC606A21A03DFF531DB98" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_7D4A88486251E819BEDA03DFF5310283" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeAxis_7BF978AAB39BC606A21A03DFF531DB98" xlink:to="loc_us-gaap_RangeMember_7D4A88486251E819BEDA03DFF5310283" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_5CC74AC6A0E41D16A8CF03DFF531B88E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_7D4A88486251E819BEDA03DFF5310283" xlink:to="loc_us-gaap_MaximumMember_5CC74AC6A0E41D16A8CF03DFF531B88E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_221C0766BB9DEF97651603DFF531D2BD" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_7D4A88486251E819BEDA03DFF5310283" xlink:to="loc_us-gaap_MinimumMember_221C0766BB9DEF97651603DFF531D2BD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_B85EC0220DE1EF3B2D8303DFF531BBD8" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_9864B1DF422A2127A20903DFF5307892" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_B85EC0220DE1EF3B2D8303DFF531BBD8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_95D44E9DBFA4D7AE034803DFF5319E2F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_B85EC0220DE1EF3B2D8303DFF531BBD8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_95D44E9DBFA4D7AE034803DFF5319E2F" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_MinimumGrantDateFairValueOfNonqualifiedStockOptionsAsPercentageOfFairValueOfCommonStock" xlink:label="loc_mrcy_MinimumGrantDateFairValueOfNonqualifiedStockOptionsAsPercentageOfFairValueOfCommonStock_900486AC5BA3BB06D4B003DFF531CDC7" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_B85EC0220DE1EF3B2D8303DFF531BBD8" xlink:to="loc_mrcy_MinimumGrantDateFairValueOfNonqualifiedStockOptionsAsPercentageOfFairValueOfCommonStock_900486AC5BA3BB06D4B003DFF531CDC7" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_ShareBasedCompensationArrangementByShareBasedPaymentAwardContractualLife" xlink:label="loc_mrcy_ShareBasedCompensationArrangementByShareBasedPaymentAwardContractualLife_7D612FA7B2E7072C68D403DFF531AD9C" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_B85EC0220DE1EF3B2D8303DFF531BBD8" xlink:to="loc_mrcy_ShareBasedCompensationArrangementByShareBasedPaymentAwardContractualLife_7D612FA7B2E7072C68D403DFF531AD9C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_CA2BE3686F87B9B22F4303DFF5318D83" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_B85EC0220DE1EF3B2D8303DFF531BBD8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_CA2BE3686F87B9B22F4303DFF5318D83" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPriceOfferingDate" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPriceOfferingDate_8309B75F7CDD1CD7C28F03DFF5310A7E" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_B85EC0220DE1EF3B2D8303DFF531BBD8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPriceOfferingDate_8309B75F7CDD1CD7C28F03DFF5310A7E" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_EmployeeStockPurchasePlanMaximumPercentageOfCompensationToPurchaseSharesByEligibleParticipants" xlink:label="loc_mrcy_EmployeeStockPurchasePlanMaximumPercentageOfCompensationToPurchaseSharesByEligibleParticipants_E0678657BBED9603B8FA03DFF5325018" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_B85EC0220DE1EF3B2D8303DFF531BBD8" xlink:to="loc_mrcy_EmployeeStockPurchasePlanMaximumPercentageOfCompensationToPurchaseSharesByEligibleParticipants_E0678657BBED9603B8FA03DFF5325018" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/StockBasedCompensationExpensesDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_39AB7042BCF2B7A8EB9B03DFF5C1E5A6" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_2716AF6E2737003FB28803DFF5C18180" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_39AB7042BCF2B7A8EB9B03DFF5C1E5A6" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_2716AF6E2737003FB28803DFF5C18180" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsByReportLineAxis" xlink:label="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsByReportLineAxis_C9BAA64E9A0C8340454D03DFF5C26070" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_2716AF6E2737003FB28803DFF5C18180" xlink:to="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsByReportLineAxis_C9BAA64E9A0C8340454D03DFF5C26070" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsReportLineDomain" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsReportLineDomain_C489E5564B487334235303DFF5C2A3CF" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsByReportLineAxis_C9BAA64E9A0C8340454D03DFF5C26070" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsReportLineDomain_C489E5564B487334235303DFF5C2A3CF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CostOfSalesMember" xlink:label="loc_us-gaap_CostOfSalesMember_CC7B20B82AA7B7428D7603DFF5C275BF" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsReportLineDomain_C489E5564B487334235303DFF5C2A3CF" xlink:to="loc_us-gaap_CostOfSalesMember_CC7B20B82AA7B7428D7603DFF5C275BF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesMember" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_0523AFE77CFECDAF3B3D03DFF5C20A9E" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsReportLineDomain_C489E5564B487334235303DFF5C2A3CF" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_0523AFE77CFECDAF3B3D03DFF5C20A9E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ResearchAndDevelopmentExpenseMember" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpenseMember_AAA807E8432B70DFAD2803DFF5C2698C" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsReportLineDomain_C489E5564B487334235303DFF5C2A3CF" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpenseMember_AAA807E8432B70DFAD2803DFF5C2698C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_AD7993213134C1C7E0AA03DFF5C2753B" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_2716AF6E2737003FB28803DFF5C18180" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_AD7993213134C1C7E0AA03DFF5C2753B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_us-gaap_ShareBasedCompensation_14FE3BAFEE39BE1F9A3B03DFF5C2F283" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_AD7993213134C1C7E0AA03DFF5C2753B" xlink:to="loc_us-gaap_ShareBasedCompensation_14FE3BAFEE39BE1F9A3B03DFF5C2F283" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_6E1F63482AC84E8EDF4303DFF5C2C9BF" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_AD7993213134C1C7E0AA03DFF5C2753B" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_6E1F63482AC84E8EDF4303DFF5C2C9BF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax_525FC9B0651BD32B45D403DFF5C2859C" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_AD7993213134C1C7E0AA03DFF5C2753B" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax_525FC9B0651BD32B45D403DFF5C2859C" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/StockBasedCompensationTables" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_918665EAF25419DBAC1403DFF5F7C3D1" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_7459B0266FF2C8749FDE03DFF5F74521" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_918665EAF25419DBAC1403DFF5F7C3D1" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_7459B0266FF2C8749FDE03DFF5F74521" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfNonvestedShareActivityTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfNonvestedShareActivityTableTextBlock_A0C5F1546E5E5A52697203DFF5F70B34" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_918665EAF25419DBAC1403DFF5F7C3D1" xlink:to="loc_us-gaap_ScheduleOfNonvestedShareActivityTableTextBlock_A0C5F1546E5E5A52697203DFF5F70B34" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock" xlink:label="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock_6CEF1DB0C0D9DC1BC90403DFF5F7CFB4" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_918665EAF25419DBAC1403DFF5F7C3D1" xlink:to="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock_6CEF1DB0C0D9DC1BC90403DFF5F7CFB4" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/SubsequentEvents" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SubsequentEventsAbstract" xlink:label="loc_us-gaap_SubsequentEventsAbstract_672508C40CA68CD079D303DFF5E82797" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SubsequentEventsTextBlock" xlink:label="loc_us-gaap_SubsequentEventsTextBlock_64141CFB21F0DB4FD03B03DFF5E8DC35" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventsAbstract_672508C40CA68CD079D303DFF5E82797" xlink:to="loc_us-gaap_SubsequentEventsTextBlock_64141CFB21F0DB4FD03B03DFF5E8DC35" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/SummaryOfFinancialAssetsMeasuredAtFairValueOnRecurringBasisDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract_47FE45A11A7E2E03CEF3D34F1CAC122A" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_9A6935FC67AFB48BB515D34F1CACBD02" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_47FE45A11A7E2E03CEF3D34F1CAC122A" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_9A6935FC67AFB48BB515D34F1CACBD02" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_EE6D79DD61E118CCDA9FD34F1CAC60F0" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_9A6935FC67AFB48BB515D34F1CACBD02" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_EE6D79DD61E118CCDA9FD34F1CAC60F0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_9B6BD6340CC16FF78112D34F1CACC909" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_EE6D79DD61E118CCDA9FD34F1CAC60F0" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_9B6BD6340CC16FF78112D34F1CACC909" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_4A8B312B7DEF8113B9EDD34F1CACB3A7" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_9B6BD6340CC16FF78112D34F1CACC909" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_4A8B312B7DEF8113B9EDD34F1CACB3A7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueByBalanceSheetGroupingDisclosureItemAmountsAxis" xlink:label="loc_us-gaap_FairValueByBalanceSheetGroupingDisclosureItemAmountsAxis_CFCBAB77DE2EE7A4B1D9D34F1CACED0F" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_9A6935FC67AFB48BB515D34F1CACBD02" xlink:to="loc_us-gaap_FairValueByBalanceSheetGroupingDisclosureItemAmountsAxis_CFCBAB77DE2EE7A4B1D9D34F1CACED0F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueDisclosureItemAmountsDomain" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_DE37D189C1B2E1D442E8D34F1CAC7D52" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingDisclosureItemAmountsAxis_CFCBAB77DE2EE7A4B1D9D34F1CACED0F" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_DE37D189C1B2E1D442E8D34F1CAC7D52" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_OperatingCashMember" xlink:label="loc_mrcy_OperatingCashMember_276ABBDD73CB5989B108D34F1CAC544E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_DE37D189C1B2E1D442E8D34F1CAC7D52" xlink:to="loc_mrcy_OperatingCashMember_276ABBDD73CB5989B108D34F1CAC544E" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_RestrictedCashMember" xlink:label="loc_mrcy_RestrictedCashMember_F248574D5F4394982C5BD34F1CAC8DDD" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_DE37D189C1B2E1D442E8D34F1CAC7D52" xlink:to="loc_mrcy_RestrictedCashMember_F248574D5F4394982C5BD34F1CAC8DDD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_B64928B953561ACF632AD34F1CAC0378" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_9A6935FC67AFB48BB515D34F1CACBD02" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_B64928B953561ACF632AD34F1CAC0378" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_5E7D61A9A4D9D4D6A9F2D34F1CAC2E19" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_B64928B953561ACF632AD34F1CAC0378" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_5E7D61A9A4D9D4D6A9F2D34F1CAC2E19" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_98BC7404A482E3C6CCBAD34F1CAC44A6" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_5E7D61A9A4D9D4D6A9F2D34F1CAC2E19" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_98BC7404A482E3C6CCBAD34F1CAC44A6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_027F48940BE904CF4906D34F1CADC7F3" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_5E7D61A9A4D9D4D6A9F2D34F1CAC2E19" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_027F48940BE904CF4906D34F1CADC7F3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_D5995EC8F14271EB8637D34F1CADACC6" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_5E7D61A9A4D9D4D6A9F2D34F1CAC2E19" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_D5995EC8F14271EB8637D34F1CADACC6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_2D447B03FF2D107F616ED34F1CADD068" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_9A6935FC67AFB48BB515D34F1CACBD02" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_2D447B03FF2D107F616ED34F1CADD068" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AssetsFairValueDisclosureAbstract" xlink:label="loc_us-gaap_AssetsFairValueDisclosureAbstract_CCF98ED336A10F6A8E52D34F1CADC5F2" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_2D447B03FF2D107F616ED34F1CADD068" xlink:to="loc_us-gaap_AssetsFairValueDisclosureAbstract_CCF98ED336A10F6A8E52D34F1CADC5F2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AssetsFairValueDisclosure" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_73BD1F82CF95275377CAD34F1CAD33A9" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_CCF98ED336A10F6A8E52D34F1CADC5F2" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_73BD1F82CF95275377CAD34F1CAD33A9" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/SummaryOfNonvestedRestrictedStockDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_77AB7C833409B9654CCC03DFF4E5C777" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_B3F65BF8D687ECD639FC03DFF4E5139C" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_77AB7C833409B9654CCC03DFF4E5C777" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_B3F65BF8D687ECD639FC03DFF4E5139C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_3901CD31C877BCD8A79403DFF4E54FBD" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_B3F65BF8D687ECD639FC03DFF4E5139C" xlink:to="loc_us-gaap_AwardTypeAxis_3901CD31C877BCD8A79403DFF4E54FBD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_4BE879884968245BA87503DFF4E56CA6" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AwardTypeAxis_3901CD31C877BCD8A79403DFF4E54FBD" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_4BE879884968245BA87503DFF4E56CA6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RestrictedStockMember" xlink:label="loc_us-gaap_RestrictedStockMember_1BADBCEE8D42725F359A03DFF4E6C6BB" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_4BE879884968245BA87503DFF4E56CA6" xlink:to="loc_us-gaap_RestrictedStockMember_1BADBCEE8D42725F359A03DFF4E6C6BB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_61FA1503DC51FB78031503DFF4E64A81" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_B3F65BF8D687ECD639FC03DFF4E5139C" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_61FA1503DC51FB78031503DFF4E64A81" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_3025AAE98C2458A2232A03DFF4E69848" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_61FA1503DC51FB78031503DFF4E64A81" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_3025AAE98C2458A2232A03DFF4E69848" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_4831D8D20DE3D438100F03DFF4E659EC" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_3025AAE98C2458A2232A03DFF4E69848" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_4831D8D20DE3D438100F03DFF4E659EC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_12D92904791F105E430F03DFF4E62CFE" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_3025AAE98C2458A2232A03DFF4E69848" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_12D92904791F105E430F03DFF4E62CFE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_D1C20EE62089FE5205B403DFF4E6B45B" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_3025AAE98C2458A2232A03DFF4E69848" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_D1C20EE62089FE5205B403DFF4E6B45B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_01277EB30D602ACE1ED303DFF4E67676" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_3025AAE98C2458A2232A03DFF4E69848" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_01277EB30D602ACE1ED303DFF4E67676" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_F41CB05BEBFDF233F4F603DFF4E6A8E3" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_3025AAE98C2458A2232A03DFF4E69848" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_F41CB05BEBFDF233F4F603DFF4E6A8E3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_803AF9371651786CE92E03DFF4E6271A" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_61FA1503DC51FB78031503DFF4E64A81" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_803AF9371651786CE92E03DFF4E6271A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_C435447E15068B36B00303DFF4E623C5" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_803AF9371651786CE92E03DFF4E6271A" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_C435447E15068B36B00303DFF4E623C5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_E1B26E669BF3CADCDED303DFF4E75932" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_803AF9371651786CE92E03DFF4E6271A" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_E1B26E669BF3CADCDED303DFF4E75932" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_192D615D3B4E22D2B80303DFF4E7A053" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_803AF9371651786CE92E03DFF4E6271A" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_192D615D3B4E22D2B80303DFF4E7A053" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_7C4344538459E37ECDF703DFF4E79FED" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_803AF9371651786CE92E03DFF4E6271A" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_7C4344538459E37ECDF703DFF4E79FED" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_3BA53FCD6CA019107D3603DFF4E70C2B" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_803AF9371651786CE92E03DFF4E6271A" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_3BA53FCD6CA019107D3603DFF4E70C2B" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/SummaryOfPerformanceOfOperationsByReportableSegmentDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_61DD488D11E9CC9AB58A03DFF5DBD9B3" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable" xlink:label="loc_us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable_6E4D447CD4D52F6966E703DFF5DBCC01" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_61DD488D11E9CC9AB58A03DFF5DBD9B3" xlink:to="loc_us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable_6E4D447CD4D52F6966E703DFF5DBCC01" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_C031F7DE29346205B63503DFF5DB19D6" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable_6E4D447CD4D52F6966E703DFF5DBCC01" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_C031F7DE29346205B63503DFF5DB19D6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_1FDE159487253DF2DE0B03DFF5DBE282" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_C031F7DE29346205B63503DFF5DB19D6" xlink:to="loc_us-gaap_SegmentDomain_1FDE159487253DF2DE0B03DFF5DBE282" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_MercuryCommercialElectronicsMember" xlink:label="loc_mrcy_MercuryCommercialElectronicsMember_A4F78D789CB2F18490BB03DFF5DB399C" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentDomain_1FDE159487253DF2DE0B03DFF5DBE282" xlink:to="loc_mrcy_MercuryCommercialElectronicsMember_A4F78D789CB2F18490BB03DFF5DB399C" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_MercuryDefenseAndIntelligenceSystemsMember" xlink:label="loc_mrcy_MercuryDefenseAndIntelligenceSystemsMember_B8B2CD960A7D884B8BD803DFF5DBDE76" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentDomain_1FDE159487253DF2DE0B03DFF5DBE282" xlink:to="loc_mrcy_MercuryDefenseAndIntelligenceSystemsMember_B8B2CD960A7D884B8BD803DFF5DBDE76" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IntersegmentEliminationMember" xlink:label="loc_us-gaap_IntersegmentEliminationMember_05B588340D03EBAEF50503DFF5DB53E2" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentDomain_1FDE159487253DF2DE0B03DFF5DBE282" xlink:to="loc_us-gaap_IntersegmentEliminationMember_05B588340D03EBAEF50503DFF5DB53E2" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_StatementSegmentReportingAxis" xlink:label="loc_mrcy_StatementSegmentReportingAxis_8D99F1F88E6B31DF53AB03DFF5DBC688" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable_6E4D447CD4D52F6966E703DFF5DBCC01" xlink:to="loc_mrcy_StatementSegmentReportingAxis_8D99F1F88E6B31DF53AB03DFF5DBC688" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_StatementSegmentReportingDomain" xlink:label="loc_mrcy_StatementSegmentReportingDomain_792A5C556BDCF2D8193403DFF5DBDC7C" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mrcy_StatementSegmentReportingAxis_8D99F1F88E6B31DF53AB03DFF5DBC688" xlink:to="loc_mrcy_StatementSegmentReportingDomain_792A5C556BDCF2D8193403DFF5DBDC7C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ReportableSegmentsMember" xlink:label="loc_us-gaap_ReportableSegmentsMember_72177F56652EACDE90E203DFF5DBF4C7" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mrcy_StatementSegmentReportingDomain_792A5C556BDCF2D8193403DFF5DBDC7C" xlink:to="loc_us-gaap_ReportableSegmentsMember_72177F56652EACDE90E203DFF5DBF4C7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SegmentReportingRevenueReconcilingItemLineItems" xlink:label="loc_us-gaap_SegmentReportingRevenueReconcilingItemLineItems_1D04C93AAAEFDC4BA42303DFF5DB0848" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable_6E4D447CD4D52F6966E703DFF5DBCC01" xlink:to="loc_us-gaap_SegmentReportingRevenueReconcilingItemLineItems_1D04C93AAAEFDC4BA42303DFF5DB0848" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RevenuesFromExternalCustomers" xlink:label="loc_us-gaap_RevenuesFromExternalCustomers_DC22B740CB23A3843A1703DFF5DB929D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingRevenueReconcilingItemLineItems_1D04C93AAAEFDC4BA42303DFF5DB0848" xlink:to="loc_us-gaap_RevenuesFromExternalCustomers_DC22B740CB23A3843A1703DFF5DB929D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RevenuesFromTransactionsWithOtherOperatingSegmentsOfSameEntity" xlink:label="loc_us-gaap_RevenuesFromTransactionsWithOtherOperatingSegmentsOfSameEntity_337432EAD3E8673A189D03DFF5DBBA8C" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingRevenueReconcilingItemLineItems_1D04C93AAAEFDC4BA42303DFF5DB0848" xlink:to="loc_us-gaap_RevenuesFromTransactionsWithOtherOperatingSegmentsOfSameEntity_337432EAD3E8673A189D03DFF5DBBA8C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues_F591A3B5A194877F27E003DFF5DBBCCD" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingRevenueReconcilingItemLineItems_1D04C93AAAEFDC4BA42303DFF5DB0848" xlink:to="loc_us-gaap_Revenues_F591A3B5A194877F27E003DFF5DBBCCD" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization" xlink:label="loc_mrcy_AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization_11FD78A385DAF15C34D103DFF5DCE077" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingRevenueReconcilingItemLineItems_1D04C93AAAEFDC4BA42303DFF5DB0848" xlink:to="loc_mrcy_AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization_11FD78A385DAF15C34D103DFF5DCE077" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/SummaryOfSignificantAccountingPolicies" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_7B2DA22734A7F33C6E0903DFF5AEB629" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SignificantAccountingPoliciesTextBlock" xlink:label="loc_us-gaap_SignificantAccountingPoliciesTextBlock_648E13D8AAE972EB5CA903DFF5AE3132" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_7B2DA22734A7F33C6E0903DFF5AEB629" xlink:to="loc_us-gaap_SignificantAccountingPoliciesTextBlock_648E13D8AAE972EB5CA903DFF5AE3132" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/SummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_5CE44AD2D62B31507C9A03DFF55A2638" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NumberOfOperatingSegments" xlink:label="loc_us-gaap_NumberOfOperatingSegments_C23364FED728045C66A303DFF55A28DA" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_5CE44AD2D62B31507C9A03DFF55A2638" xlink:to="loc_us-gaap_NumberOfOperatingSegments_C23364FED728045C66A303DFF55A28DA" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_SignificantAccountingPoliciesTable" xlink:label="loc_mrcy_SignificantAccountingPoliciesTable_463CA00968E5C5CDF1E403DFF55A8B13" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_5CE44AD2D62B31507C9A03DFF55A2638" xlink:to="loc_mrcy_SignificantAccountingPoliciesTable_463CA00968E5C5CDF1E403DFF55A8B13" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredRevenueArrangementTypeAxis" xlink:label="loc_us-gaap_DeferredRevenueArrangementTypeAxis_63250665AADBA033B41503DFF55AC9C7" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mrcy_SignificantAccountingPoliciesTable_463CA00968E5C5CDF1E403DFF55A8B13" xlink:to="loc_us-gaap_DeferredRevenueArrangementTypeAxis_63250665AADBA033B41503DFF55AC9C7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredRevenueArrangementTypeDomain" xlink:label="loc_us-gaap_DeferredRevenueArrangementTypeDomain_98D41CF4EF3FD9F3F7E103DFF55B1D73" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DeferredRevenueArrangementTypeAxis_63250665AADBA033B41503DFF55AC9C7" xlink:to="loc_us-gaap_DeferredRevenueArrangementTypeDomain_98D41CF4EF3FD9F3F7E103DFF55B1D73" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_MultipleDeliveryRevenueMember" xlink:label="loc_mrcy_MultipleDeliveryRevenueMember_780CA04264571DE0BFDD03DFF55BA196" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DeferredRevenueArrangementTypeDomain_98D41CF4EF3FD9F3F7E103DFF55B1D73" xlink:to="loc_mrcy_MultipleDeliveryRevenueMember_780CA04264571DE0BFDD03DFF55BA196" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_SignificantAccountingPoliciesLineItems" xlink:label="loc_mrcy_SignificantAccountingPoliciesLineItems_8749E2956051F0027D2A03DFF55B9388" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mrcy_SignificantAccountingPoliciesTable_463CA00968E5C5CDF1E403DFF55A8B13" xlink:to="loc_mrcy_SignificantAccountingPoliciesLineItems_8749E2956051F0027D2A03DFF55B9388" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_PercentageOfRevenueRecognized" xlink:label="loc_mrcy_PercentageOfRevenueRecognized_3AFA5FFEEB1D38C2448003DFF55B7425" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mrcy_SignificantAccountingPoliciesLineItems_8749E2956051F0027D2A03DFF55B9388" xlink:to="loc_mrcy_PercentageOfRevenueRecognized_3AFA5FFEEB1D38C2448003DFF55B7425" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_57FECBFBD0CC9FBFA7E103DFF55BFAD6" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mrcy_SignificantAccountingPoliciesLineItems_8749E2956051F0027D2A03DFF55B9388" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_57FECBFBD0CC9FBFA7E103DFF55BFAD6" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/SummaryOfSignificantAccountingPoliciesPolicies" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_BB5D8067CC70CA7E1CB503DFF543EF0E" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BasisOfAccountingPolicyPolicyTextBlock" xlink:label="loc_us-gaap_BasisOfAccountingPolicyPolicyTextBlock_1DAFB987E7BF84EAD4A103DFF543EF33" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_BB5D8067CC70CA7E1CB503DFF543EF0E" xlink:to="loc_us-gaap_BasisOfAccountingPolicyPolicyTextBlock_1DAFB987E7BF84EAD4A103DFF543EF33" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_UseOfEstimates" xlink:label="loc_us-gaap_UseOfEstimates_C4C14192A77B076468FB03DFF54360EE" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_BB5D8067CC70CA7E1CB503DFF543EF0E" xlink:to="loc_us-gaap_UseOfEstimates_C4C14192A77B076468FB03DFF54360EE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RevenueRecognitionPolicyTextBlock" xlink:label="loc_us-gaap_RevenueRecognitionPolicyTextBlock_1B187568F415D50FAE2503DFF543B7BF" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_BB5D8067CC70CA7E1CB503DFF543EF0E" xlink:to="loc_us-gaap_RevenueRecognitionPolicyTextBlock_1B187568F415D50FAE2503DFF543B7BF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EarningsPerSharePolicyTextBlock" xlink:label="loc_us-gaap_EarningsPerSharePolicyTextBlock_6B6E9C231596781C4F4603DFF54378F2" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_BB5D8067CC70CA7E1CB503DFF543EF0E" xlink:to="loc_us-gaap_EarningsPerSharePolicyTextBlock_6B6E9C231596781C4F4603DFF54378F2" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/SummaryOfSignificantAccountingPoliciesTables" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_043AD407A47E11D687CE03DFF5B73B06" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfWeightedAverageNumberOfSharesTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfWeightedAverageNumberOfSharesTableTextBlock_1AD262116E0AC6E66EFD03DFF5B75056" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_043AD407A47E11D687CE03DFF5B73B06" xlink:to="loc_us-gaap_ScheduleOfWeightedAverageNumberOfSharesTableTextBlock_1AD262116E0AC6E66EFD03DFF5B75056" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://mrcy.com/role/SummaryOfStockOptionPlansDetail" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_42A42F4210BE313E6EDED34F1BD79BC5" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_DBA2291C6CF564B5050CD34F1BD74B36" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_42A42F4210BE313E6EDED34F1BD79BC5" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_DBA2291C6CF564B5050CD34F1BD74B36" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PlanNameAxis" xlink:label="loc_us-gaap_PlanNameAxis_BBB94580C16A734F2263D34F1BD8E255" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_DBA2291C6CF564B5050CD34F1BD74B36" xlink:to="loc_us-gaap_PlanNameAxis_BBB94580C16A734F2263D34F1BD8E255" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PlanNameDomain" xlink:label="loc_us-gaap_PlanNameDomain_CDEE7C02EC929F409F73D34F1BD893E3" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PlanNameAxis_BBB94580C16A734F2263D34F1BD8E255" xlink:to="loc_us-gaap_PlanNameDomain_CDEE7C02EC929F409F73D34F1BD893E3" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_StockOptionPlanTwentyZeroFiveMember" xlink:label="loc_mrcy_StockOptionPlanTwentyZeroFiveMember_6CADB67E4B0729810F62D34F1BD85716" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PlanNameDomain_CDEE7C02EC929F409F73D34F1BD893E3" xlink:to="loc_mrcy_StockOptionPlanTwentyZeroFiveMember_6CADB67E4B0729810F62D34F1BD85716" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_2E9162C6140F6CB10F84D34F1BD8A301" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_DBA2291C6CF564B5050CD34F1BD74B36" xlink:to="loc_us-gaap_AwardTypeAxis_2E9162C6140F6CB10F84D34F1BD8A301" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_E6A5BBDA70212EE805CDD34F1BD8E90C" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AwardTypeAxis_2E9162C6140F6CB10F84D34F1BD8A301" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_E6A5BBDA70212EE805CDD34F1BD8E90C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EmployeeStockMember" xlink:label="loc_us-gaap_EmployeeStockMember_81569E2922050A85BE58D34F1BD8527B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_E6A5BBDA70212EE805CDD34F1BD8E90C" xlink:to="loc_us-gaap_EmployeeStockMember_81569E2922050A85BE58D34F1BD8527B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockOptionsMember" xlink:label="loc_us-gaap_StockOptionsMember_780DF602D11E5F348BB3D34F1BD8E249" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_E6A5BBDA70212EE805CDD34F1BD8E90C" xlink:to="loc_us-gaap_StockOptionsMember_780DF602D11E5F348BB3D34F1BD8E249" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_63E96498A3EFC419F45DD34F1BD81C29" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_DBA2291C6CF564B5050CD34F1BD74B36" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_63E96498A3EFC419F45DD34F1BD81C29" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized_7A5C3564EB778CCF1F15D34F1BD845B4" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_63E96498A3EFC419F45DD34F1BD81C29" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized_7A5C3564EB778CCF1F15D34F1BD845B4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_5B31CA7F95C2B992EF5ED34F1BD8C69E" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_63E96498A3EFC419F45DD34F1BD81C29" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_5B31CA7F95C2B992EF5ED34F1BD8C69E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_F0D143E4FBBF82FEA040D34F1BD9C584" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_5B31CA7F95C2B992EF5ED34F1BD8C69E" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_F0D143E4FBBF82FEA040D34F1BD9C584" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod_47639670DCB5A4B8B323D34F1BD97BE3" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_5B31CA7F95C2B992EF5ED34F1BD8C69E" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod_47639670DCB5A4B8B323D34F1BD97BE3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_1650ADB88D080550CF0AD34F1BD9986B" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_5B31CA7F95C2B992EF5ED34F1BD8C69E" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_1650ADB88D080550CF0AD34F1BD9986B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod_FFF5693998175943C91AD34F1BD96997" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_5B31CA7F95C2B992EF5ED34F1BD8C69E" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod_FFF5693998175943C91AD34F1BD96997" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_5BA95152A94B95E98844D34F1BD9A182" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_5B31CA7F95C2B992EF5ED34F1BD8C69E" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_5BA95152A94B95E98844D34F1BD9A182" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_3E7050FDF33565464086D34F1BD93416" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_63E96498A3EFC419F45DD34F1BD81C29" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_3E7050FDF33565464086D34F1BD93416" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_252F070A67CE27C53B0DD34F1BD9308C" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_3E7050FDF33565464086D34F1BD93416" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_252F070A67CE27C53B0DD34F1BD9308C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_B733F520B6C1A07661BDD34F1BD96BB9" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_3E7050FDF33565464086D34F1BD93416" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_B733F520B6C1A07661BDD34F1BD96BB9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_FF1373CBFAC5B79B5B52D34F1BD94795" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_3E7050FDF33565464086D34F1BD93416" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_FF1373CBFAC5B79B5B52D34F1BD94795" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice_33F90AA6B895C6728363D34F1BD94D09" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_3E7050FDF33565464086D34F1BD93416" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice_33F90AA6B895C6728363D34F1BD94D09" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_C6CAA1DE6D023917B6BDD34F1BD91672" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_3E7050FDF33565464086D34F1BD93416" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_C6CAA1DE6D023917B6BDD34F1BD91672" xlink:type="arc" />
    <loc xlink:href="mrcy-20140331.xsd#mrcy_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract" xlink:label="loc_mrcy_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract_DE2781C6A98948EE9DCED34F1BD91E0A" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_63E96498A3EFC419F45DD34F1BD81C29" xlink:to="loc_mrcy_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract_DE2781C6A98948EE9DCED34F1BD91E0A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_3B5A4E5B42F6108E556ED34F1BD922FA" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mrcy_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract_DE2781C6A98948EE9DCED34F1BD91E0A" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_3B5A4E5B42F6108E556ED34F1BD922FA" xlink:type="arc" />
  </presentationLink>
</linkbase>
