<XBRL>
<?xml version="1.0" encoding="US-ASCII"?>
<!--XBRL Document Created with WebFilings-->
<xsd:schema attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://www.kratosdefense.com/20120624" xmlns:ktos="http://www.kratosdefense.com/20120624" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" xmlns:num="http://www.xbrl.org/dtr/type/numeric" xmlns:us-types="http://fasb.org/us-types/2012-01-31" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <xsd:import namespace="http://fasb.org/us-gaap/2012-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd" />
  <xsd:import namespace="http://fasb.org/us-roles/2012-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2012/elts/us-roles-2012-01-31.xsd" />
  <xsd:import namespace="http://fasb.org/us-types/2012-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2012/elts/us-types-2012-01-31.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2009/arcrole/fact-explanatoryFact" schemaLocation="http://www.xbrl.org/lrr/arcrole/factExplanatory-2009-12-16.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2009/role/negated" schemaLocation="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2009/role/net" schemaLocation="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd" />
  <xsd:import namespace="http://www.xbrl.org/dtr/type/non-numeric" schemaLocation="http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd" />
  <xsd:import namespace="http://www.xbrl.org/dtr/type/numeric" schemaLocation="http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd" />
  <xsd:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/country/2012-01-31" schemaLocation="http://xbrl.sec.gov/country/2012/country-2012-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/currency/2012-01-31" schemaLocation="http://xbrl.sec.gov/currency/2012/currency-2012-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/dei/2012-01-31" schemaLocation="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/exch/2012-01-31" schemaLocation="http://xbrl.sec.gov/exch/2012/exch-2012-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/invest/2012-01-31" schemaLocation="http://xbrl.sec.gov/invest/2012/invest-2012-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/naics/2011-01-31" schemaLocation="http://xbrl.sec.gov/naics/2011/naics-2011-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/sic/2011-01-31" schemaLocation="http://xbrl.sec.gov/sic/2011/sic-2011-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/stpr/2011-01-31" schemaLocation="http://xbrl.sec.gov/stpr/2011/stpr-2011-01-31.xsd" />
  <xsd:annotation>
    <xsd:appinfo>
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="ktos-20120624_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="ktos-20120624_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="ktos-20120624_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="ktos-20120624_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:type="simple" />
      <link:roleType id="AcquisitionsContingentAcquisitionConsiderationDetails" roleURI="http://www.kratosdefense.com/role/AcquisitionsContingentAcquisitionConsiderationDetails">
        <link:definition>2402409 - Disclosure - Acquisitions - Contingent Acquisition Consideration (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AcquisitionsCriticalInfrastructureBusinessDetails" roleURI="http://www.kratosdefense.com/role/AcquisitionsCriticalInfrastructureBusinessDetails">
        <link:definition>2402403 - Disclosure - Acquisitions - Critical Infrastructure Business (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AcquisitionsHerleyIndustriesIncDetails" roleURI="http://www.kratosdefense.com/role/AcquisitionsHerleyIndustriesIncDetails">
        <link:definition>2402406 - Disclosure - Acquisitions - Herley Industries, Inc. (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AcquisitionsIntegralSystemsIncDetails" roleURI="http://www.kratosdefense.com/role/AcquisitionsIntegralSystemsIncDetails">
        <link:definition>2402405 - Disclosure - Acquisitions - Integral Systems, Inc. (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AcquisitionsNotes" roleURI="http://www.kratosdefense.com/role/AcquisitionsNotes">
        <link:definition>2102100 - Disclosure - Acquisitions (Notes)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AcquisitionsProFormaFinancialInformationDetails" roleURI="http://www.kratosdefense.com/role/AcquisitionsProFormaFinancialInformationDetails">
        <link:definition>2402407 - Disclosure - Acquisitions - Pro Forma Financial Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AcquisitionsProFormaFinancialInformationNonrecurringAdjustmentsDetails" roleURI="http://www.kratosdefense.com/role/AcquisitionsProFormaFinancialInformationNonrecurringAdjustmentsDetails">
        <link:definition>2402408 - Disclosure - Acquisitions - Pro Forma Financial Information, Nonrecurring Adjustments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AcquisitionsPurchasePriceAllocationDetails" roleURI="http://www.kratosdefense.com/role/AcquisitionsPurchasePriceAllocationDetails">
        <link:definition>2402402 - Disclosure - Acquisitions - Purchase Price Allocation (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AcquisitionsSecureinfoCorporationDetails" roleURI="http://www.kratosdefense.com/role/AcquisitionsSecureinfoCorporationDetails">
        <link:definition>2402404 - Disclosure - Acquisitions - SecureInfo Corporation (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AcquisitionsTables" roleURI="http://www.kratosdefense.com/role/AcquisitionsTables">
        <link:definition>2302301 - Disclosure - Acquisitions (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsAndContingencies" roleURI="http://www.kratosdefense.com/role/CommitmentsAndContingencies">
        <link:definition>2114100 - Disclosure - Commitments and Contingencies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsAndContingenciesTables" roleURI="http://www.kratosdefense.com/role/CommitmentsAndContingenciesTables">
        <link:definition>2314301 - Disclosure - Commitments and Contingencies (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsAndContingenciesWarrantyDetails" roleURI="http://www.kratosdefense.com/role/CommitmentsAndContingenciesWarrantyDetails">
        <link:definition>2414402 - Disclosure - Commitments and Contingencies - Warranty (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CondensedConsolidatedBalanceSheets" roleURI="http://www.kratosdefense.com/role/CondensedConsolidatedBalanceSheets">
        <link:definition>1001000 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CondensedConsolidatedBalanceSheetsParenthetical" roleURI="http://www.kratosdefense.com/role/CondensedConsolidatedBalanceSheetsParenthetical">
        <link:definition>1001501 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CondensedConsolidatedStatementsOfCashFlows" roleURI="http://www.kratosdefense.com/role/CondensedConsolidatedStatementsOfCashFlows">
        <link:definition>1003000 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CondensedConsolidatedStatementsOfOperationsAndComprehensiveIncome" roleURI="http://www.kratosdefense.com/role/CondensedConsolidatedStatementsOfOperationsAndComprehensiveIncome">
        <link:definition>1002000 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Debt" roleURI="http://www.kratosdefense.com/role/Debt">
        <link:definition>2109100 - Disclosure - Debt</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Debt1100MillionCreditFacilityDetails" roleURI="http://www.kratosdefense.com/role/Debt1100MillionCreditFacilityDetails">
        <link:definition>2409403 - Disclosure - Debt - $110.0 million Credit Facility (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtDebtAcquiredInAcquisitionOfHerleyDetails" roleURI="http://www.kratosdefense.com/role/DebtDebtAcquiredInAcquisitionOfHerleyDetails">
        <link:definition>2409404 - Disclosure - Debt - Debt Acquired in Acquisition of Herley (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtFairValueOfLongTermDebtDetails" roleURI="http://www.kratosdefense.com/role/DebtFairValueOfLongTermDebtDetails">
        <link:definition>2409405 - Disclosure - Debt - Fair Value of Long-term Debt (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtIssuanceOf10SeniorSecuredNotesDue2017Details" roleURI="http://www.kratosdefense.com/role/DebtIssuanceOf10SeniorSecuredNotesDue2017Details">
        <link:definition>2409402 - Disclosure - Debt - Issuance of 10% Senior Secured Notes due 2017 (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtTables" roleURI="http://www.kratosdefense.com/role/DebtTables">
        <link:definition>2309301 - Disclosure - Debt (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Derivatives" roleURI="http://www.kratosdefense.com/role/Derivatives">
        <link:definition>2111100 - Disclosure - Derivatives</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DerivativesDetails" roleURI="http://www.kratosdefense.com/role/DerivativesDetails">
        <link:definition>2411401 - Disclosure - Derivatives (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DiscontinuedOperations" roleURI="http://www.kratosdefense.com/role/DiscontinuedOperations">
        <link:definition>2108100 - Disclosure - Discontinued Operations</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DiscontinuedOperationsDetails" roleURI="http://www.kratosdefense.com/role/DiscontinuedOperationsDetails">
        <link:definition>2408402 - Disclosure - Discontinued Operations (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DiscontinuedOperationsTables" roleURI="http://www.kratosdefense.com/role/DiscontinuedOperationsTables">
        <link:definition>2308301 - Disclosure - Discontinued Operations (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DocumentAndEntityInformation" roleURI="http://www.kratosdefense.com/role/DocumentAndEntityInformation">
        <link:definition>0001000 - Document - Document and Entity Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueOfFinancialInstruments" roleURI="http://www.kratosdefense.com/role/FairValueOfFinancialInstruments">
        <link:definition>2110100 - Disclosure - Fair Value of Financial Instruments</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillAndIntangibleAssetsGoodwillDetails" roleURI="http://www.kratosdefense.com/role/GoodwillAndIntangibleAssetsGoodwillDetails">
        <link:definition>2403402 - Disclosure - Goodwill and Intangible Assets - Goodwill (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillAndIntangibleAssetsNotes" roleURI="http://www.kratosdefense.com/role/GoodwillAndIntangibleAssetsNotes">
        <link:definition>2103100 - Disclosure - Goodwill and Intangible Assets (Notes)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillAndIntangibleAssetsPurchasedFiniteLivedIntangibleAssetsFutureAmortizationDetails" roleURI="http://www.kratosdefense.com/role/GoodwillAndIntangibleAssetsPurchasedFiniteLivedIntangibleAssetsFutureAmortizationDetails">
        <link:definition>2403404 - Disclosure - Goodwill and Intangible Assets - Purchased Finite-lived Intangible Assets, Future Amortization (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillAndIntangibleAssetsPurchasedIntangibleAssetsDetails" roleURI="http://www.kratosdefense.com/role/GoodwillAndIntangibleAssetsPurchasedIntangibleAssetsDetails">
        <link:definition>2403403 - Disclosure - Goodwill and Intangible Assets - Purchased Intangible Assets (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillAndIntangibleAssetsTables" roleURI="http://www.kratosdefense.com/role/GoodwillAndIntangibleAssetsTables">
        <link:definition>2303301 - Disclosure - Goodwill and Intangible Assets (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxes" roleURI="http://www.kratosdefense.com/role/IncomeTaxes">
        <link:definition>2107100 - Disclosure - Income Taxes</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesIncomeTaxProvisionReconciliationDetails" roleURI="http://www.kratosdefense.com/role/IncomeTaxesIncomeTaxProvisionReconciliationDetails">
        <link:definition>2407403 - Disclosure - Income Taxes - Income Tax Provision Reconciliation (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesNarrativeDetails" roleURI="http://www.kratosdefense.com/role/IncomeTaxesNarrativeDetails">
        <link:definition>2407402 - Disclosure - Income Taxes - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesTables" roleURI="http://www.kratosdefense.com/role/IncomeTaxesTables">
        <link:definition>2307301 - Disclosure - Income Taxes (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="InventoriedCostsDetails" roleURI="http://www.kratosdefense.com/role/InventoriedCostsDetails">
        <link:definition>2404402 - Disclosure - Inventoried Costs (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="InventoriedCostsNotes" roleURI="http://www.kratosdefense.com/role/InventoriedCostsNotes">
        <link:definition>2104100 - Disclosure - Inventoried Costs (Notes)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="InventoriedCostsTables" roleURI="http://www.kratosdefense.com/role/InventoriedCostsTables">
        <link:definition>2304301 - Disclosure - Inventoried Costs (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="NetIncomeLossPerCommonShare" roleURI="http://www.kratosdefense.com/role/NetIncomeLossPerCommonShare">
        <link:definition>2106100 - Disclosure - Net Income (Loss) Per Common Share</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="NetIncomeLossPerCommonShareDetails" roleURI="http://www.kratosdefense.com/role/NetIncomeLossPerCommonShareDetails">
        <link:definition>2406402 - Disclosure - Net Income (Loss) Per Common Share (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="NetIncomeLossPerCommonShareSharesExcludedFromCalculationOfDilutedIncomePerShareDetails" roleURI="http://www.kratosdefense.com/role/NetIncomeLossPerCommonShareSharesExcludedFromCalculationOfDilutedIncomePerShareDetails">
        <link:definition>2406403 - Disclosure - Net Income (Loss) Per Common Share - Shares Excluded from Calculation of Diluted Income per Share (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="NetIncomeLossPerCommonShareTables" roleURI="http://www.kratosdefense.com/role/NetIncomeLossPerCommonShareTables">
        <link:definition>2306301 - Disclosure - Net Income (Loss) Per Common Share (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformation" roleURI="http://www.kratosdefense.com/role/SegmentInformation">
        <link:definition>2113100 - Disclosure - Segment Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformationDetails" roleURI="http://www.kratosdefense.com/role/SegmentInformationDetails">
        <link:definition>2413402 - Disclosure - Segment Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformationTables" roleURI="http://www.kratosdefense.com/role/SegmentInformationTables">
        <link:definition>2313301 - Disclosure - Segment Information (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SignificantCustomers" roleURI="http://www.kratosdefense.com/role/SignificantCustomers">
        <link:definition>2112100 - Disclosure - Significant Customers</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SignificantCustomersDetails" roleURI="http://www.kratosdefense.com/role/SignificantCustomersDetails">
        <link:definition>2412401 - Disclosure - Significant Customers (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockholdersEquity" roleURI="http://www.kratosdefense.com/role/StockholdersEquity">
        <link:definition>2105100 - Disclosure - Stockholders' Equity</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockholdersEquityNarrativeDetails" roleURI="http://www.kratosdefense.com/role/StockholdersEquityNarrativeDetails">
        <link:definition>2405402 - Disclosure - Stockholders' Equity - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockholdersEquityRollforwardOfCommonStockOutstandingDetails" roleURI="http://www.kratosdefense.com/role/StockholdersEquityRollforwardOfCommonStockOutstandingDetails">
        <link:definition>2405404 - Disclosure - Stockholders' Equity - Rollforward of Common Stock Outstanding (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockholdersEquitySummaryOfChangesInStockholdersEquityDetails" roleURI="http://www.kratosdefense.com/role/StockholdersEquitySummaryOfChangesInStockholdersEquityDetails">
        <link:definition>2405403 - Disclosure - Stockholders' Equity - Summary of Changes in Stockholders' Equity (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockholdersEquityTables" roleURI="http://www.kratosdefense.com/role/StockholdersEquityTables">
        <link:definition>2305301 - Disclosure - Stockholders' Equity (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SubsequentEventsDetails" roleURI="http://www.kratosdefense.com/role/SubsequentEventsDetails">
        <link:definition>2415401 - Disclosure - Subsequent Events (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SubsequentEventsNotes" roleURI="http://www.kratosdefense.com/role/SubsequentEventsNotes">
        <link:definition>2115100 - Disclosure - Subsequent Events (Notes)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryOfSignificantAccountingPoliciesConcentrationsAndUncertaintiesDetails" roleURI="http://www.kratosdefense.com/role/SummaryOfSignificantAccountingPoliciesConcentrationsAndUncertaintiesDetails">
        <link:definition>2401403 - Disclosure - Summary of Significant Accounting Policies - Concentrations and Uncertainties (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryOfSignificantAccountingPoliciesNotes" roleURI="http://www.kratosdefense.com/role/SummaryOfSignificantAccountingPoliciesNotes">
        <link:definition>2101100 - Disclosure - Summary of Significant Accounting Policies (Notes)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryOfSignificantAccountingPoliciesPolicies" roleURI="http://www.kratosdefense.com/role/SummaryOfSignificantAccountingPoliciesPolicies">
        <link:definition>2201201 - Disclosure - Summary of Significant Accounting Policies (Policies)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryOfSignificantAccountingPoliciesSummaryOfSignificantAccountingPoliciesFiscalYearDetails" roleURI="http://www.kratosdefense.com/role/SummaryOfSignificantAccountingPoliciesSummaryOfSignificantAccountingPoliciesFiscalYearDetails">
        <link:definition>2401402 - Disclosure - Summary of Significant Accounting Policies Summary of Significant Accounting Policies - Fiscal Year (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </xsd:appinfo>
  </xsd:annotation>
  <xsd:element abstract="true" id="ktos_AllocatedShareBasedCompensationExpenseAdjustmentMember" name="AllocatedShareBasedCompensationExpenseAdjustmentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ktos_AmortizationOfIntangibleAssetsAdjustmentMember" name="AmortizationOfIntangibleAssetsAdjustmentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ktos_BaseRateOtherThanLiborBorrowingsMember" name="BaseRateOtherThanLiborBorrowingsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ktos_BudgetDeficitReductionsAmount" name="BudgetDeficitReductionsAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:periodType="instant" />
  <xsd:element id="ktos_BusinessAcquisitionAcquireesRestrictedStockConversionTermsRightToReceiveCashAmount" name="BusinessAcquisitionAcquireesRestrictedStockConversionTermsRightToReceiveCashAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:periodType="instant" />
  <xsd:element id="ktos_BusinessAcquisitionAcquireesStockOptionsBasisForExchangeTermsAmount" name="BusinessAcquisitionAcquireesStockOptionsBasisForExchangeTermsAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:periodType="instant" />
  <xsd:element id="ktos_BusinessAcquisitionAcquireesStockOptionsConversionRatio" name="BusinessAcquisitionAcquireesStockOptionsConversionRatio" nillable="true" substitutionGroup="xbrli:item" type="xbrli:pureItemType" xbrli:periodType="instant" />
  <xsd:element id="ktos_BusinessAcquisitionAcquireesStockOptionsExercisePriceBasisForExchangeTerms" name="BusinessAcquisitionAcquireesStockOptionsExercisePriceBasisForExchangeTerms" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="instant" />
  <xsd:element id="ktos_BusinessAcquisitionConsiderationTransferredToEachAcquireesStockholderCash" name="BusinessAcquisitionConsiderationTransferredToEachAcquireesStockholderCash" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:periodType="instant" />
  <xsd:element id="ktos_BusinessAcquisitionConsiderationTransferredToEachAcquireesStockholderCompanySharesPerShareOfAcquireesStock" name="BusinessAcquisitionConsiderationTransferredToEachAcquireesStockholderCompanySharesPerShareOfAcquireesStock" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant" />
  <xsd:element id="ktos_BusinessAcquisitionContingentConsiderationCashPaid" name="BusinessAcquisitionContingentConsiderationCashPaid" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="ktos_BusinessAcquisitionContingentConsiderationCashPayments" name="BusinessAcquisitionContingentConsiderationCashPayments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="ktos_BusinessAcquisitionContingentConsiderationPotentialReduction" name="BusinessAcquisitionContingentConsiderationPotentialReduction" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="ktos_BusinessAcquisitionEquityInterestIssuedOrIssuableReplacementStockOptionsFairValue" name="BusinessAcquisitionEquityInterestIssuedOrIssuableReplacementStockOptionsFairValue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ktos_BusinessAcquisitionMember" name="BusinessAcquisitionMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ktos_BusinessAcquisitionNumberOfSharesAcquired" name="BusinessAcquisitionNumberOfSharesAcquired" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant" />
  <xsd:element id="ktos_BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeIncomeTaxes" name="BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeIncomeTaxes" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="ktos_BusinessAcquisitionProFormaNetIncomeLossAvailableToCommonStockholdersBasic" name="BusinessAcquisitionProFormaNetIncomeLossAvailableToCommonStockholdersBasic" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="ktos_BusinessAcquisitionPurchasePriceAllocationDebt" name="BusinessAcquisitionPurchasePriceAllocationDebt" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="ktos_BusinessAcquisitionPurchasePriceAllocationDeferredTaxLiabilities" name="BusinessAcquisitionPurchasePriceAllocationDeferredTaxLiabilities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="ktos_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestNumberOfShares" name="BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestNumberOfShares" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ktos_BusinessCombinationChangeInControlObligationsMember" name="BusinessCombinationChangeInControlObligationsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ktos_BusinessCombinationCombinedTransactionExpensesMember" name="BusinessCombinationCombinedTransactionExpensesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ktos_BusinessCombinationContingentConsiderationArrangementBasisForAmountFinal" name="BusinessCombinationContingentConsiderationArrangementBasisForAmountFinal" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:periodType="instant" />
  <xsd:element id="ktos_BusinessCombinationContingentConsiderationArrangementBasisForAmountWorkingCapital" name="BusinessCombinationContingentConsiderationArrangementBasisForAmountWorkingCapital" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="ktos_BusinessCombinationContingentConsiderationArrangementWorkingCapitalAdjustment" name="BusinessCombinationContingentConsiderationArrangementWorkingCapitalAdjustment" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ktos_CompositeEngineeringIncMember" name="CompositeEngineeringIncMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ktos_ConcentrationsAndUncertaintiesPolicyTextBlock" name="ConcentrationsAndUncertaintiesPolicyTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ktos_ContractsAndBacklogMember" name="ContractsAndBacklogMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ktos_CriticalInfrastructureBusinessMember" name="CriticalInfrastructureBusinessMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ktos_DebtAbstract" name="DebtAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ktos_DebtInstrumentFixedChargeCoverageRatio" name="DebtInstrumentFixedChargeCoverageRatio" nillable="true" substitutionGroup="xbrli:item" type="xbrli:pureItemType" xbrli:periodType="instant" />
  <xsd:element id="ktos_DebtInstrumentIssuancePremiumPercentage" name="DebtInstrumentIssuancePremiumPercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="ktos_DebtInstrumentMaturityPeriod" name="DebtInstrumentMaturityPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="instant" />
  <xsd:element id="ktos_DebtInstrumentRedemptionAmountAsPercentageOfAggregatePrincipalAmount" name="DebtInstrumentRedemptionAmountAsPercentageOfAggregatePrincipalAmount" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="ktos_DebtInstrumentRedemptionPriceAsPercentageOfAggregatePrincipalAmount" name="DebtInstrumentRedemptionPriceAsPercentageOfAggregatePrincipalAmount" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ktos_DeiServicesCorporationMember" name="DeiServicesCorporationMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ktos_DenominatorMember" name="DenominatorMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ktos_DisposalGroupIncludingDiscontinuedOperationNoncurrentUnrecognizedTaxBenefits" name="DisposalGroupIncludingDiscontinuedOperationNoncurrentUnrecognizedTaxBenefits" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ktos_DocumentAndEntityInformation" name="DocumentAndEntityInformation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ktos_EarnoutMember" name="EarnoutMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ktos_FavorableOperatingLeaseMember" name="FavorableOperatingLeaseMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ktos_FinalMember" name="FinalMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ktos_FiscalYearDuration" name="FiscalYearDuration" nillable="true" substitutionGroup="xbrli:item" type="us-types:durationStringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ktos_FiscalYearLineItems" name="FiscalYearLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ktos_FiscalYearTable" name="FiscalYearTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ktos_GoodwillAccessOfFairValueOverCarryingValuePercentage" name="GoodwillAccessOfFairValueOverCarryingValuePercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ktos_HerleyIndustriesIncMember" name="HerleyIndustriesIncMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ktos_HoldbackEscrowMember" name="HoldbackEscrowMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ktos_ImpairmentChargesAndAdjustmentsToUnusedOfficeSpaceLiability" name="ImpairmentChargesAndAdjustmentsToUnusedOfficeSpaceLiability" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="ktos_IncomeTaxDisclosureLossCorporationEquityOwnershipInterestIncreasePercentage" name="IncomeTaxDisclosureLossCorporationEquityOwnershipInterestIncreasePercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="ktos_IncomeTaxDisclosureLossCorporationEquityOwnershipInterestIncreasePeriod" name="IncomeTaxDisclosureLossCorporationEquityOwnershipInterestIncreasePeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="instant" />
  <xsd:element id="ktos_IncomeTaxDisclosureLossCorporationEquityOwnershipInterestPercentage" name="IncomeTaxDisclosureLossCorporationEquityOwnershipInterestPercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ktos_IncomeTaxExpenseBenefitMember" name="IncomeTaxExpenseBenefitMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ktos_IncomeTaxReconciliationStateIncomeTaxesAndForeignIncomeTaxRateDifferential" name="IncomeTaxReconciliationStateIncomeTaxesAndForeignIncomeTaxRateDifferential" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ktos_IntegralSystemsIncMember" name="IntegralSystemsIncMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ktos_KratosGovernmentSolutionsMember" name="KratosGovernmentSolutionsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ktos_LiabilitiesForUncertainTaxPositionsThatWillExpireWithinTwelveMonths" name="LiabilitiesForUncertainTaxPositionsThatWillExpireWithinTwelveMonths" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ktos_LiborBaseRateBorrowingsMember" name="LiborBaseRateBorrowingsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ktos_LineOfCreditFacilityMaximumPossibleBorrowingsSubjectToApplicationAndBankApproval" name="LineOfCreditFacilityMaximumPossibleBorrowingsSubjectToApplicationAndBankApproval" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="ktos_NumberOfDaysToObjectToComputationOfClosingWorkingCapital" name="NumberOfDaysToObjectToComputationOfClosingWorkingCapital" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ktos_NumeratorMember" name="NumeratorMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ktos_OperatingLossCarryforwardsFederalAnnualUtilizationLimitAfterYearFive" name="OperatingLossCarryforwardsFederalAnnualUtilizationLimitAfterYearFive" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="ktos_OperatingLossCarryforwardsFederalAnnualUtilizationLimitNextFiveYears" name="OperatingLossCarryforwardsFederalAnnualUtilizationLimitNextFiveYears" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ktos_PreliminaryMember" name="PreliminaryMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ktos_ProceedsFromIssuanceOfCommonStockGross" name="ProceedsFromIssuanceOfCommonStockGross" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ktos_ProductWarrantiesMember" name="ProductWarrantiesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ktos_ProductWarrantyAccrualWarrantyTerm" name="ProductWarrantyAccrualWarrantyTerm" nillable="true" substitutionGroup="xbrli:item" type="us-types:durationStringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ktos_PublicSafetyAndSecurityMember" name="PublicSafetyAndSecurityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ktos_PurchasePriceAdjustmentMember" name="PurchasePriceAdjustmentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ktos_RedemptionDateAxis" name="RedemptionDateAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ktos_RedemptionDateDomain" name="RedemptionDateDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ktos_RedemptionPeriodFourMember" name="RedemptionPeriodFourMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ktos_RedemptionPeriodOneMember" name="RedemptionPeriodOneMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ktos_RedemptionPeriodThreeMember" name="RedemptionPeriodThreeMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ktos_RedemptionPeriodTwoMember" name="RedemptionPeriodTwoMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ktos_RevenueRecurringInNaturePercentOfBusiness" name="RevenueRecurringInNaturePercentOfBusiness" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="ktos_SecondQuarterYearToDateDuration" name="SecondQuarterYearToDateDuration" nillable="true" substitutionGroup="xbrli:item" type="us-types:durationStringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ktos_SecureinfoCorporationMember" name="SecureinfoCorporationMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ktos_SignificantCustomersDisclosureTextBlock" name="SignificantCustomersDisclosureTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="ktos_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlanStockOptionsAndRestrictedStockUnits" name="StockIssuedDuringPeriodSharesEmployeeStockPurchasePlanStockOptionsAndRestrictedStockUnits" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ktos_SwingLineLoanMember" name="SwingLineLoanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ktos_TaxDeductionRealizationPeriod" name="TaxDeductionRealizationPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ktos_TenPercentSeniorNotesDueJune2017Member" name="TenPercentSeniorNotesDueJune2017Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ktos_USGovernmentMember" name="USGovernmentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ktos_YearsInBusiness" name="YearsInBusiness" nillable="true" substitutionGroup="xbrli:item" type="us-types:durationStringItemType" xbrli:periodType="instant" />
</xsd:schema>
</XBRL>
