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  <xsd:element abstract="true" id="mg_InternationalMember" name="InternationalMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="mg_LineOfCreditFacilityAccordionFeatureHigherBorrowingCapacityOption" name="LineOfCreditFacilityAccordionFeatureHigherBorrowingCapacityOption" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="mg_LineOfCreditFacilityMaximumBorrowingCapacityAvailableForIssuanceOfLettersOfCredit" name="LineOfCreditFacilityMaximumBorrowingCapacityAvailableForIssuanceOfLettersOfCredit" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="mg_LineOfCreditFacilityMaximumBorrowingCapacityInNonUSCurrencies" name="LineOfCreditFacilityMaximumBorrowingCapacityInNonUSCurrencies" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="mg_LongTermIncentivePlan2009Member" name="LongTermIncentivePlan2009Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="mg_MultiemployerPlansCollectiveBargainingArrangementNumberOfArrangementsWithSignificantDeclineinEmployeesCoveredExpected" name="MultiemployerPlansCollectiveBargainingArrangementNumberOfArrangementsWithSignificantDeclineinEmployeesCoveredExpected" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="mg_MultiemployerPlansNumberofSubsidiariesThatCouldExperienceSignificantDeclineinEmployeesCoveredbyCollectiveBargainingArrangement" name="MultiemployerPlansNumberofSubsidiariesThatCouldExperienceSignificantDeclineinEmployeesCoveredbyCollectiveBargainingArrangement" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="mg_NDTDoBrazilLTDAMember" name="NDTDoBrazilLTDAMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="mg_NumberOfEmployeeShareBasedPlans" name="NumberOfEmployeeShareBasedPlans" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mg_OfficeFurnitureAndEquipmentMember" name="OfficeFurnitureAndEquipmentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mg_OilGasMember" name="OilGasMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mg_OperatingLeaseArrangementMember" name="OperatingLeaseArrangementMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mg_OtherAmericasMember" name="OtherAmericasMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mg_OtherLongTermDebtMember" name="OtherLongTermDebtMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mg_OtherProcessIndustriesMember" name="OtherProcessIndustriesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mg_OtherProductsandServicesMember" name="OtherProductsandServicesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="mg_PaymentsOfContingentConsiderationForBusinessAcquisitions" name="PaymentsOfContingentConsiderationForBusinessAcquisitions" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="mg_PaymentsToAcquireIntangibleAssetsAndSoftware" name="PaymentsToAcquireIntangibleAssetsAndSoftware" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mg_PowerGenerationandTransmissionMember" name="PowerGenerationandTransmissionMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mg_ProductsandSystemsMember" name="ProductsandSystemsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mg_RenewableEnergyIndustryCustomerMember" name="RenewableEnergyIndustryCustomerMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="mg_RevenuePracticalExpedientIncrementalCostofObtainingContractMaximumPeriod" name="RevenuePracticalExpedientIncrementalCostofObtainingContractMaximumPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mg_RightOfUseAssetObtainedInExchangeForLeaseLiabilityAbstract" name="RightOfUseAssetObtainedInExchangeForLeaseLiabilityAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="mg_ScheduleOfAccruedLiabilitiesDeferredRevenueAndContingentConsiderationLiabilitiesCurrentTableTextBlock" name="ScheduleOfAccruedLiabilitiesDeferredRevenueAndContingentConsiderationLiabilitiesCurrentTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="mg_ScheduleOfBusinessCombinationAcquisitionRelatedCostsTableTextBlock" name="ScheduleOfBusinessCombinationAcquisitionRelatedCostsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mg_ServicesMember" name="ServicesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mg_SeveranceandLaborDisputesMember" name="SeveranceandLaborDisputesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="mg_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardPerformancePeriod" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardPerformancePeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="mg_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAwardMetrics" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAwardMetrics" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="mg_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfNonEmployeeDirectorsToWhomAwardIsGranted" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfNonEmployeeDirectorsToWhomAwardIsGranted" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="mg_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsAdjustmentsinPeriodWeightedAverageGrantDateFairValue" name="SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsAdjustmentsinPeriodWeightedAverageGrantDateFairValue" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="mg_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsIncreaseDecreaseAdjustmentsinPeriod" name="SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsIncreaseDecreaseAdjustmentsinPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mg_SharebasedCompensationAwardTrancheFourMember" name="SharebasedCompensationAwardTrancheFourMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="mg_SharesIssuedSharesSharebasedPaymentArrangementafterForfeitureAndAdjustmentstoAdditionalPaidinCapitalIncomeTaxDeficiencyfromSharebasedCompensation" name="SharesIssuedSharesSharebasedPaymentArrangementafterForfeitureAndAdjustmentstoAdditionalPaidinCapitalIncomeTaxDeficiencyfromSharebasedCompensation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="mg_SharesIssuedValueSharebasedPaymentArrangementafterForfeitureAndAdjustmentstoAdditionalPaidinCapitalIncomeTaxDeficiencyfromSharebasedCompensation" name="SharesIssuedValueSharebasedPaymentArrangementafterForfeitureAndAdjustmentstoAdditionalPaidinCapitalIncomeTaxDeficiencyfromSharebasedCompensation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mg_StockRepurchasePlanMember" name="StockRepurchasePlanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="mg_TemporaryStaffLeasingContractPeriod" name="TemporaryStaffLeasingContractPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mg_TermALoanFacilityMember" name="TermALoanFacilityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mg_TriumphAerostructuresVoughtAircraftDivisionvMistrasGroupMember" name="TriumphAerostructuresVoughtAircraftDivisionvMistrasGroupMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mg_WeightedAverageDiscountRatePercentAbstract" name="WeightedAverageDiscountRatePercentAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mg_WeightedAverageRemainingLeaseTermAbstract" name="WeightedAverageRemainingLeaseTermAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
</xsd:schema>
