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        <link:usedOn>link:definitionLink</link:usedOn>
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    </xsd:appinfo>
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  <xsd:element abstract="true" id="mtz_AutomobileLiabilityPolicyMember" name="AutomobileLiabilityPolicyMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="mtz_AvailableForSaleSecuritiesMaturityDateInYears" name="AvailableForSaleSecuritiesMaturityDateInYears" nillable="true" substitutionGroup="xbrli:item" type="xbrli:decimalItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="mtz_BottomLineServicesMember" name="BottomLineServicesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="mtz_CashAndCashEquivalentsPeriodIncreaseDecreaseIncludingDiscontinuedOperations" name="CashAndCashEquivalentsPeriodIncreaseDecreaseIncludingDiscontinuedOperations" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtz_CentralStatesSoutheastAndSouthwestAreasPensionFundMember" name="CentralStatesSoutheastAndSouthwestAreasPensionFundMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtz_CityOfMarathonMember" name="CityOfMarathonMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtz_CommonStockOutstandingMember" name="CommonStockOutstandingMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtz_CommunicationsMember" name="CommunicationsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtz_CondensedUnauditedFinancialStatementsSupplementalGuarantorInformationAbstract" name="CondensedUnauditedFinancialStatementsSupplementalGuarantorInformationAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="mtz_ConsolidationItemsDomain" name="ConsolidationItemsDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
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  <xsd:element id="mtz_DebtInstrumentRedemptionPeriodStartDate" name="DebtInstrumentRedemptionPeriodStartDate" nillable="true" substitutionGroup="xbrli:item" type="xbrli:dateItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtz_DebtInstrumentRedemptionPeriodThreeMember" name="DebtInstrumentRedemptionPeriodThreeMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtz_DebtInstrumentRedemptionPeriodTwoMember" name="DebtInstrumentRedemptionPeriodTwoMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
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  <xsd:element id="mtz_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed" name="DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtz_DebtRedeemedMember" name="DebtRedeemedMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtz_DebtRepurchasedMember" name="DebtRepurchasedMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtz_DirectTvMember" name="DirectTvMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtz_DirectstarBusinessMember" name="DirectstarBusinessMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtz_DocumentAndEntityInformationAbstract" name="DocumentAndEntityInformationAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtz_DynamicTowerMember" name="DynamicTowerMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="mtz_EarnOutPeriod" name="EarnOutPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="mtz_EarnoutArrangementsMember" name="EarnoutArrangementsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="mtz_Ebitda" name="Ebitda" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtz_EcSourceServicesLlcMember" name="EcSourceServicesLlcMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtz_EnbridgeMemberDomain" name="EnbridgeMemberDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="mtz_EntityNumberOfEmployeesDuringPeriod" name="EntityNumberOfEmployeesDuringPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:decimalItemType" xbrli:periodType="duration" />
  <xsd:element id="mtz_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTableTextBlock" name="FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtz_ForeignOperationMember" name="ForeignOperationMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtz_FourPointEightSevenFivePercentSeniorNotesMember" name="FourPointEightSevenFivePercentSeniorNotesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtz_GlobetecBusinessMember" name="GlobetecBusinessMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtz_GoGreenMember" name="GoGreenMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtz_GoodwillAndIntangibleAssetsRollForward" name="GoodwillAndIntangibleAssetsRollForward" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtz_GoodwillAndOtherIntangibleAssetsLineItems" name="GoodwillAndOtherIntangibleAssetsLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="mtz_GoodwillAndOtherIntangibleAssetsTranslationAdjustments" name="GoodwillAndOtherIntangibleAssetsTranslationAdjustments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
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  <xsd:element id="mtz_NetFinancingActivitiesAndAdvancesFromConsolidatedAffiliates" name="NetFinancingActivitiesAndAdvancesFromConsolidatedAffiliates" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="mtz_NewFourPointZeroPercentageSeniorConvertibleNotesMember" name="NewFourPointZeroPercentageSeniorConvertibleNotesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="mtz_OptimaNetworkServicesIncMember" name="OptimaNetworkServicesIncMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="mtz_PerEmployeeMember" name="PerEmployeeMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtz_PowerGenerationAndIndustrialMember" name="PowerGenerationAndIndustrialMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtz_PreQualificationsMember" name="PreQualificationsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtz_PropertyAndEquipmentMember" name="PropertyAndEquipmentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtz_RelatedCustomerMember" name="RelatedCustomerMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtz_ReportableGeographicalComponentsMember" name="ReportableGeographicalComponentsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtz_RockExtractionBusinessMember" name="RockExtractionBusinessMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
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  <xsd:element id="mtz_SharePriceDuringPeriod" name="SharePriceDuringPeriod" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtz_SintelMember" name="SintelMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtz_TenLargestCustomersMember" name="TenLargestCustomersMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="mtz_TotalDilutiveConvertibleDebtMember" name="TotalDilutiveConvertibleDebtMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtz_TotalNewSeniorConvertibleNotesMember" name="TotalNewSeniorConvertibleNotesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtz_TotalRemainingOriginalSeniorConvertibleNotesMember" name="TotalRemainingOriginalSeniorConvertibleNotesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtz_UmbrellaPolicyMember" name="UmbrellaPolicyMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtz_UnderlyingCreditRatingAaMinusMember" name="UnderlyingCreditRatingAaMinusMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtz_UnderlyingCreditRatingBbMember" name="UnderlyingCreditRatingBbMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtz_UnderlyingCreditRatingCccMember" name="UnderlyingCreditRatingCccMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtz_UtilitiesMember" name="UtilitiesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mtz_WorkersCompensationPolicyMember" name="WorkersCompensationPolicyMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
</xsd:schema>