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  <xs:element id="saic_IncreaseInIncomeFromChangeInContractEstimates" abstract="false" name="IncreaseInIncomeFromChangeInContractEstimates" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_DeferredTaxAssetsContractWithCustomerLiability" abstract="false" name="DeferredTaxAssetsContractWithCustomerLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_February2019CreditFacilityTermLoanBMember" abstract="true" name="February2019CreditFacilityTermLoanBMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_MaximumRangeOfAwardsOfTargetNumberOfShares" abstract="false" name="MaximumRangeOfAwardsOfTargetNumberOfShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="saic_TransfersOfFinancialAssetsAccountedForAsSalesMarpaTableTextBlock" abstract="false" name="TransfersOfFinancialAssetsAccountedForAsSalesMarpaTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="saic_BusinessCombinationProvisionForOffMarketCustomerContracts" abstract="false" name="BusinessCombinationProvisionForOffMarketCustomerContracts" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_StockCancelledToCoverPriceOfOptionsExercises" abstract="false" name="StockCancelledToCoverPriceOfOptionsExercises" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOperatingLeaseRightofUseAsset" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOperatingLeaseRightofUseAsset" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_EarningsPerShareTable" abstract="true" name="EarningsPerShareTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="saic_TransferOfFinancialAssetsAccountedForAsSalesRemainingSoldReceivables" abstract="false" name="TransferOfFinancialAssetsAccountedForAsSalesRemainingSoldReceivables" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_RetireeHealthReimbursementAccountPlanMember" abstract="true" name="RetireeHealthReimbursementAccountPlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_UnisysFederalMember" abstract="true" name="UnisysFederalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_BacklogMember" abstract="true" name="BacklogMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_DefinedBenefitPlanMutualFundandGuaranteedDepositAccountMember" abstract="true" name="DefinedBenefitPlanMutualFundandGuaranteedDepositAccountMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_AuditorInformationAbstract" abstract="true" name="AuditorInformationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="saic_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherAccruedLiabilities" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherAccruedLiabilities" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_IncreaseDecreaseInIncomeFromChangeInContractEstimates" abstract="false" name="IncreaseDecreaseInIncomeFromChangeInContractEstimates" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_SeniorNotesDueAprilTwoThousandTwentyEightMember" abstract="true" name="SeniorNotesDueAprilTwoThousandTwentyEightMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_ExitedFacilitiesMember" abstract="true" name="ExitedFacilitiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_DerivativeContractSettlementAndTermination" abstract="false" name="DerivativeContractSettlementAndTermination" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="saic_GuaranteedDepositAccountIncreaseForPurchases" abstract="false" name="GuaranteedDepositAccountIncreaseForPurchases" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_ThirdAmendedCreditAgreementMember" abstract="true" name="ThirdAmendedCreditAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_PercentageOfAwardsPresentedForTargetNumberOfShares" abstract="false" name="PercentageOfAwardsPresentedForTargetNumberOfShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="saic_GuaranteedDepositAccountDecreaseFromSales" abstract="false" name="GuaranteedDepositAccountDecreaseFromSales" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_OperatingLeaseLiabilityToBePaidSubleaseArrangements" abstract="false" name="OperatingLeaseLiabilityToBePaidSubleaseArrangements" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_SecondTermMember" abstract="true" name="SecondTermMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_AcquisitionAndIntegrationCostsMember" abstract="true" name="AcquisitionAndIntegrationCostsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_IncomeTaxesLineItems" abstract="true" name="IncomeTaxesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="saic_IncomeTaxesTable" abstract="true" name="IncomeTaxesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="saic_ChangeInContractEstimatesIncomeTaxEffect" abstract="false" name="ChangeInContractEstimatesIncomeTaxEffect" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_DebtCovenantPeriodAxis" abstract="true" name="DebtCovenantPeriodAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="saic_DeferredTaxLiabilitiesOperatingLeaseRightofUseAsset" abstract="false" name="DeferredTaxLiabilitiesOperatingLeaseRightofUseAsset" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_PostCombinationExpense" abstract="false" name="PostCombinationExpense" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_DebtInstrumentNonCurrentCarryingAmount" abstract="false" name="DebtInstrumentNonCurrentCarryingAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_DebtIssuanceCostsInterestExpense" abstract="false" name="DebtIssuanceCostsInterestExpense" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_BusinessCombinationAdditionalCashPayments" abstract="false" name="BusinessCombinationAdditionalCashPayments" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract" abstract="true" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="saic_FulfillmentCostCurrentMember" abstract="true" name="FulfillmentCostCurrentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentWorkingCapitalAdjustments" abstract="false" name="BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentWorkingCapitalAdjustments" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_TransferOfFinancialAssetsAccountedForAsSalesAmountOutstanding" abstract="false" name="TransferOfFinancialAssetsAccountedForAsSalesAmountOutstanding" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_HalfakerAndAssociatesLLCMember" abstract="true" name="HalfakerAndAssociatesLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_CostsToObtainMember" abstract="true" name="CostsToObtainMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_IntegrationofEngilityMember" abstract="true" name="IntegrationofEngilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_ThirdTermMember" abstract="true" name="ThirdTermMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_PercentageOfStockAwardsVestOrExercisableAfterThreeYears" abstract="false" name="PercentageOfStockAwardsVestOrExercisableAfterThreeYears" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="saic_DeferredTaxAssetsOperatingLossCarryForwardAndTaxCreditsCarryForward" abstract="false" name="DeferredTaxAssetsOperatingLossCarryForwardAndTaxCreditsCarryForward" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_OptimizationAndConsolidatedOfFacilitiesMember" abstract="true" name="OptimizationAndConsolidatedOfFacilitiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_February2019CreditFacilityTermLoanAMember" abstract="true" name="February2019CreditFacilityTermLoanAMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAssetsIncludingGoodwill" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAssetsIncludingGoodwill" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_TwoThousandAndThirteenEquityIncentivePlanMember" abstract="true" name="TwoThousandAndThirteenEquityIncentivePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_PreContractCostMember" abstract="true" name="PreContractCostMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_StockRepurchasePlanMember" abstract="true" name="StockRepurchasePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_StockRepurchaseProgramIncreaseInNumberOfSharesAuthorizedToBeRepurchased" abstract="false" name="StockRepurchaseProgramIncreaseInNumberOfSharesAuthorizedToBeRepurchased" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="saic_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsLowerThanMinimumPerformance" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsLowerThanMinimumPerformance" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="saic_TermLoanB2FacilityDueMarchTwoThousandTwentySevenMember" abstract="true" name="TermLoanB2FacilityDueMarchTwoThousandTwentySevenMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_SubcontractorMember" abstract="true" name="SubcontractorMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_IncreaseDecreaseInIncomeFromChangeInContractEstimatesPerBasicShare" abstract="false" name="IncreaseDecreaseInIncomeFromChangeInContractEstimatesPerBasicShare" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="saic_RatioOfIndebtednessToEarningsBeforeInterestTaxesDepreciationAndAmortization" abstract="false" name="RatioOfIndebtednessToEarningsBeforeInterestTaxesDepreciationAndAmortization" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="saic_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOperatingLeaseLiabilities" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOperatingLeaseLiabilities" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_EmployeeStockOptionGrantedThereafterMember" abstract="true" name="EmployeeStockOptionGrantedThereafterMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_IncreaseDecreaseInIncomeFromChangeInContractEstimatesPerDilutedShare" abstract="false" name="IncreaseDecreaseInIncomeFromChangeInContractEstimatesPerDilutedShare" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="saic_TermLoanAFacilityDueOctoberTwoThousandTwentyThreeMember" abstract="true" name="TermLoanAFacilityDueOctoberTwoThousandTwentyThreeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_OtherSupplementalLeaseInformationTableTextBlock" abstract="false" name="OtherSupplementalLeaseInformationTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="saic_InterestRateSwapNumberThreeMember" abstract="true" name="InterestRateSwapNumberThreeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_TransfersOfFinancialAssetsAccountedForAsSalesCashCollected" abstract="false" name="TransfersOfFinancialAssetsAccountedForAsSalesCashCollected" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_TransfersOfFinancialAssetsAccountedForAsSalesMarpaTextBlock" abstract="false" name="TransfersOfFinancialAssetsAccountedForAsSalesMarpaTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="saic_SignificantAccountingPoliciesLineItems" abstract="true" name="SignificantAccountingPoliciesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="saic_OtherAccruedLIabilitiesMember" abstract="true" name="OtherAccruedLIabilitiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_DocumentAndEntityInformationAbstract" abstract="true" name="DocumentAndEntityInformationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="saic_PercentageOfStockAwardsVestOrExercisableAfterFourYears" abstract="false" name="PercentageOfStockAwardsVestOrExercisableAfterFourYears" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="saic_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccruedPayrollAndEmployeeBenefits" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccruedPayrollAndEmployeeBenefits" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_TermLoanA2FacilityDueOctoberTwoThousandTwentyThreeMember" abstract="true" name="TermLoanA2FacilityDueOctoberTwoThousandTwentyThreeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_BusinessCombinationAcquisitionAndIntegrationRelatedCosts" abstract="false" name="BusinessCombinationAcquisitionAndIntegrationRelatedCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_SignificantAccountingPoliciesTable" abstract="true" name="SignificantAccountingPoliciesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="saic_DecreaseInIncomeFromChangeInContractEstimates" abstract="false" name="DecreaseInIncomeFromChangeInContractEstimates" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_GuaranteedDepositAccountMember" abstract="true" name="GuaranteedDepositAccountMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_TransfersOfFinancialAssetsAccountedForAsSalesCashCollectedNotRemittedToPurchaser" abstract="false" name="TransfersOfFinancialAssetsAccountedForAsSalesCashCollectedNotRemittedToPurchaser" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_DeferredTaxLiabilitiesFixedAssetBasisDifference" abstract="false" name="DeferredTaxLiabilitiesFixedAssetBasisDifference" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccountPayableandAccruedLiabilities" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccountPayableandAccruedLiabilities" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsContingentlyIssuableShares" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsContingentlyIssuableShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="saic_StockRepurchasedAndRetiredUnderAuthorization" abstract="false" name="StockRepurchasedAndRetiredUnderAuthorization" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="saic_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustment" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustment" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="saic_OtherContractorMember" abstract="true" name="OtherContractorMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_TermLoanBFacilityDueOctoberTwoThousandTwentyFiveMember" abstract="true" name="TermLoanBFacilityDueOctoberTwoThousandTwentyFiveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_CommitmentsAndContingenciesLineItems" abstract="true" name="CommitmentsAndContingenciesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="saic_DeferredTaxAssetsOperatingLeaseLiability" abstract="false" name="DeferredTaxAssetsOperatingLeaseLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_OtherFederalGovernmentAgenciesMember" abstract="true" name="OtherFederalGovernmentAgenciesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_FulfillmentCostNonCurrentMember" abstract="true" name="FulfillmentCostNonCurrentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_TransferOfFinancialAssetsAccountForAsSalesIncreaseDecreaseInCashFlowsFromOperatingActivities" abstract="false" name="TransferOfFinancialAssetsAccountForAsSalesIncreaseDecreaseInCashFlowsFromOperatingActivities" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_IncreaseDecreaseInIncomeFromChangeInContractEstimatesNetOfTax" abstract="false" name="IncreaseDecreaseInIncomeFromChangeInContractEstimatesNetOfTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventoryPrepaidExpensesandOtherCurrentAssets" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventoryPrepaidExpensesandOtherCurrentAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_GuaranteedDepositAccountsAmount" abstract="false" name="GuaranteedDepositAccountsAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_CostReimbursementContractMember" abstract="true" name="CostReimbursementContractMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_RestructuringPlan2021Member" abstract="true" name="RestructuringPlan2021Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_NonStrategicInternationalOperationsMember" abstract="true" name="NonStrategicInternationalOperationsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_TransferOfFinancialAssetsAccountedForAsSalesReceivablesSoldDuringPeriod" abstract="false" name="TransferOfFinancialAssetsAccountedForAsSalesReceivablesSoldDuringPeriod" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_DebtInstrumentCurrentCarryingAmount" abstract="false" name="DebtInstrumentCurrentCarryingAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_TransfersOfFinancialAssetsAccountedForAsSalesDiscountFee" abstract="false" name="TransfersOfFinancialAssetsAccountedForAsSalesDiscountFee" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_DepartmentOfDefenseMember" abstract="true" name="DepartmentOfDefenseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_FirstAmendmenttotheThirdAmendedCreditAgreementMember" abstract="true" name="FirstAmendmenttotheThirdAmendedCreditAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_OperatingLeaseRightOfUseAssetImpairmentMember" abstract="true" name="OperatingLeaseRightOfUseAssetImpairmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_DeferredTaxAssetsPayrollTaxDeferral" abstract="false" name="DeferredTaxAssetsPayrollTaxDeferral" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_PrimeContractorMember" abstract="true" name="PrimeContractorMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentInPeriodWeightedAverageGrantDateFairValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentInPeriodWeightedAverageGrantDateFairValue" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="saic_DefinedBenefitPlanBenefitObligationIncreaseDecreaseForDiscountRateChange" abstract="false" name="DefinedBenefitPlanBenefitObligationIncreaseDecreaseForDiscountRateChange" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_EmployeeStockPurchasePlanMember" abstract="true" name="EmployeeStockPurchasePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_RestructuringPlan2022Member" abstract="true" name="RestructuringPlan2022Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_ForfeitureSupportAssociatesJ.V.Member" abstract="true" name="ForfeitureSupportAssociatesJ.V.Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_CommitmentsAndContingenciesTable" abstract="true" name="CommitmentsAndContingenciesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="saic_InterestRateSwapNumberTwoMember" abstract="true" name="InterestRateSwapNumberTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_ComputationOfEarningsPerShareLineItems" abstract="true" name="ComputationOfEarningsPerShareLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="saic_FourthTermMember" abstract="true" name="FourthTermMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_InterestRateSwapNumberOneMember" abstract="true" name="InterestRateSwapNumberOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_FirstTermMember" abstract="true" name="FirstTermMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_OperatingLeaseRightofUseAssetImpairment" abstract="false" name="OperatingLeaseRightofUseAssetImpairment" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_DebtInstrumentAmortizationRate" abstract="false" name="DebtInstrumentAmortizationRate" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="saic_DebtCovenantPeriodDomain" abstract="true" name="DebtCovenantPeriodDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_DecreaseInCapitalExpendituresIncurredButNotYetPaid" abstract="false" name="DecreaseInCapitalExpendituresIncurredButNotYetPaid" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_PercentageOfStockAwardsVestOrExercisableAfterOneYear" abstract="false" name="PercentageOfStockAwardsVestOrExercisableAfterOneYear" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="saic_February2019CreditFacilityMember" abstract="true" name="February2019CreditFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_UnrecognizedTaxBenefitsIncreaseResultingFromAvailableTaxCredits" abstract="false" name="UnrecognizedTaxBenefitsIncreaseResultingFromAvailableTaxCredits" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_AmortizationOfOffMarketCustomerContracts" abstract="false" name="AmortizationOfOffMarketCustomerContracts" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_CommercialStateAndLocalAgenciesMember" abstract="true" name="CommercialStateAndLocalAgenciesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_IncomeTaxReconciliationDeductionsFDII" abstract="false" name="IncomeTaxReconciliationDeductionsFDII" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_RestructuringPlan2020Member" abstract="true" name="RestructuringPlan2020Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_FiniteLivedIntangibleAssetsGrossCarryingValueFullyAmortized" abstract="false" name="FiniteLivedIntangibleAssetsGrossCarryingValueFullyAmortized" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_TransfersOfFinancialAssetsAccountedForAsSalesMarpaMaximumCommitment" abstract="false" name="TransfersOfFinancialAssetsAccountedForAsSalesMarpaMaximumCommitment" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_SecondAmendmentetotheThirdAmendedCreditAgreementMember" abstract="true" name="SecondAmendmentetotheThirdAmendedCreditAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_IncreaseDecreaseInOperatingLeaseAssetsandLiabilitiesNet" abstract="false" name="IncreaseDecreaseInOperatingLeaseAssetsandLiabilitiesNet" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_VestingStockAwardsMember" abstract="true" name="VestingStockAwardsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_ContractorAxis" abstract="true" name="ContractorAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="saic_ExpectedPeriodForRevenuesToBeBilledAndCollectedOnUncompletedContracts" abstract="false" name="ExpectedPeriodForRevenuesToBeBilledAndCollectedOnUncompletedContracts" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="saic_IncreaseDecreaseInAccruedPlanShareRepurchases" abstract="false" name="IncreaseDecreaseInAccruedPlanShareRepurchases" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="saic_KoverseMember" abstract="true" name="KoverseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="saic_DefinedBenefitPlanPlanAssetsLongtermRateofReturn" abstract="false" name="DefinedBenefitPlanPlanAssetsLongtermRateofReturn" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="saic_PercentageOfStockAwardsVestOrExercisableAfterTwoYears" abstract="false" name="PercentageOfStockAwardsVestOrExercisableAfterTwoYears" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
</xs:schema>
