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  <xsd:element id="expo_CashPaidDuringYearAbstract" name="CashPaidDuringYearAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="expo_DisclosureAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisAbstract" name="DisclosureAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="expo_ChangeInMarketValueOfDeferredCompensationTrustAssets" name="ChangeInMarketValueOfDeferredCompensationTrustAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="expo_CostIncurredFromReimbursableExpense" name="CostIncurredFromReimbursableExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="expo_DeferredCompensationPlanAssetsNoncurrent" name="DeferredCompensationPlanAssetsNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="expo_IncreaseDecreaseInOperationLeaseRightOfUseAssets" name="IncreaseDecreaseInOperationLeaseRightOfUseAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="expo_NumberOfClientsComprisingMoreThanTenPercentOfRevenues" name="NumberOfClientsComprisingMoreThanTenPercentOfRevenues" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="expo_NumberOfOptionsToRenewLease" name="NumberOfOptionsToRenewLease" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="expo_NumberOfStatesInWhichEntityHasLeaseArrangements" name="NumberOfStatesInWhichEntityHasLeaseArrangements" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="expo_PercentageOfAnnualBonusSettledWithVestedRestrictedStockUnitAwards" name="PercentageOfAnnualBonusSettledWithVestedRestrictedStockUnitAwards" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="expo_PercentageOfCompensationDeferredUnderDeferredCompensationArrangement" name="PercentageOfCompensationDeferredUnderDeferredCompensationArrangement" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="expo_RevenueBeforeReimbursements" name="RevenueBeforeReimbursements" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="expo_RevenueFromReimbursement" name="RevenueFromReimbursement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="expo_ShareBasedAwardsRecipientRetirementAge" name="ShareBasedAwardsRecipientRetirementAge" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="expo_ShareBasedCompensationArrangementByShareBasedPaymentAwardsAnnualVestingPercentage" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardsAnnualVestingPercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="expo_SubcontractorFeesNotIncludedInRevenues" name="SubcontractorFeesNotIncludedInRevenues" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="expo_VestedRestrictedStockAwardsHoldingPeriod" name="VestedRestrictedStockAwardsHoldingPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="expo_VestedRestrictedStockAwardsIssuedToSettleAccruedBonuses" name="VestedRestrictedStockAwardsIssuedToSettleAccruedBonuses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="expo_FairValueMeasurementsLineItems" name="FairValueMeasurementsLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="expo_ScheduleOfEarningsPerShareBasicAndDilutedLineItems" name="ScheduleOfEarningsPerShareBasicAndDilutedLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="expo_CustomeroneMember" name="CustomeroneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="expo_EngineeringAndOtherScientificMember" name="EngineeringAndOtherScientificMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="expo_EnvironmentalAndHealthMember" name="EnvironmentalAndHealthMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="expo_OfficeLaboratoryAndStorageSpaceMember" name="OfficeLaboratoryAndStorageSpaceMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="expo_PhoenixArizonaMember" name="PhoenixArizonaMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="expo_UnvestedRestrictedStockAwardsMember" name="UnvestedRestrictedStockAwardsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="expo_UnvestedRestrictedStockMember" name="UnvestedRestrictedStockMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="expo_UnvestedStockOptionsMember" name="UnvestedStockOptionsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="expo_VestedRestrictedStockAwardsMember" name="VestedRestrictedStockAwardsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="expo_FairValueMeasurementsTable" name="FairValueMeasurementsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="expo_ScheduleOfEarningsPerShareBasicAndDilutedTable" name="ScheduleOfEarningsPerShareBasicAndDilutedTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="expo_LeasesDisclosureTextBlock" name="LeasesDisclosureTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="expo_SupplementalBalanceSheetInformationRelatedToLeaseTableTextBlock" name="SupplementalBalanceSheetInformationRelatedToLeaseTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="expo_SupplementalCashFlowInformationRelatedToLeaseTableTextBlock" name="SupplementalCashFlowInformationRelatedToLeaseTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
</xsd:schema>
