

<!-- RR Donnelley Xcelerate Taxonomy Schema, based on XBRL 2.1  http://www.edgar-online.com/ -->
<!-- Version: 6.20.1 -->
<!-- Round: 5 -->
<!-- Creation date: 2013-05-02T13:32:25Z -->
<!-- Copyright (c) 2005-2013 R.R. Donnelley & Sons Company All Rights Reserved. -->
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        <link:definition>126 - Disclosure - Summary of Estimates of Fair Values of Assets Acquired and Liabilities Assumed of PriceSpective LLC (Detail)</link:definition>
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        <link:definition>127 - Disclosure - Summary of Estimates of Fair Values of Assets Acquired and Liabilities Assumed of BeijingWits Medical Limited (Detail) (BeijingWits Medical Limited (Detail)</link:definition>
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  <element name="BusinessAcquisitionAccruedConsiderationPayable" id="iclr_BusinessAcquisitionAccruedConsiderationPayable" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="BusinessAcquisitionAdditionalCashPaid" id="iclr_BusinessAcquisitionAdditionalCashPaid" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="BusinessAcquisitionCostOfAcquiredEntityAmountHeldInEscrow" id="iclr_BusinessAcquisitionCostOfAcquiredEntityAmountHeldInEscrow" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="BusinessAcquisitionPurchasePriceAllocationDeferredIncomeTaxLiabilities" id="iclr_BusinessAcquisitionPurchasePriceAllocationDeferredIncomeTaxLiabilities" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="BusinessAcquisitionPurchasePriceAllocationOtherCurrentAssets" id="iclr_BusinessAcquisitionPurchasePriceAllocationOtherCurrentAssets" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="BusinessAcquisitionPurchasePriceAllocationUnbilledRevenue" id="iclr_BusinessAcquisitionPurchasePriceAllocationUnbilledRevenue" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="BusinessAcquisitionPurchasePriceAllocationWorkingCapital" id="iclr_BusinessAcquisitionPurchasePriceAllocationWorkingCapital" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="CapitalGovernmentGrantsNoncurrent" id="iclr_CapitalGovernmentGrantsNoncurrent" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="CapitalRedemptionReserve" id="iclr_CapitalRedemptionReserve" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="CapitalRedemptionReserveMember" id="iclr_CapitalRedemptionReserveMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ClinicalTrialServicesMember" id="iclr_ClinicalTrialServicesMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="CompensationRelatedCostsShareBasedPaymentsDisclosureLineItems" id="iclr_CompensationRelatedCostsShareBasedPaymentsDisclosureLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="CompensationRelatedCostsShareBasedPaymentsDisclosureTable" id="iclr_CompensationRelatedCostsShareBasedPaymentsDisclosureTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
  <element name="DocumentDocumentandEntityInformationAbstract" id="iclr_DocumentDocumentandEntityInformationAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="EmployeeMember" id="iclr_EmployeeMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="EmployeeStockPlanTwentyZeroEightPlanMember" id="iclr_EmployeeStockPlanTwentyZeroEightPlanMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="EmployeeStockPlanTwentyZeroThreePlanMember" id="iclr_EmployeeStockPlanTwentyZeroThreePlanMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="FirstQuarterTwentyElevenRestructuringPlanMember" id="iclr_FirstQuarterTwentyElevenRestructuringPlanMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="GainLossOnContractTerminationAndBusinessExitCosts" id="iclr_GainLossOnContractTerminationAndBusinessExitCosts" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="GoodWillAcquiredPriorPeriod" id="iclr_GoodWillAcquiredPriorPeriod" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="IncomeTaxExpenseBenefitBeforeNonrecurringCharges" id="iclr_IncomeTaxExpenseBenefitBeforeNonrecurringCharges" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="IncomeTaxExpenseBenefitForNonrecurringChargesNetOfTax" id="iclr_IncomeTaxExpenseBenefitForNonrecurringChargesNetOfTax" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="IncomeTaxExpenseBenefitForNonrecurringChargesTax" id="iclr_IncomeTaxExpenseBenefitForNonrecurringChargesTax" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="IncreaseDecreaseInPrepaidExpenseAndOtherCurrentAssets" id="iclr_IncreaseDecreaseInPrepaidExpenseAndOtherCurrentAssets" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="NumberOfEmployees" id="iclr_NumberOfEmployees" type="xbrli:integerItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="OfficeConsolidationsMember" id="iclr_OfficeConsolidationsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="OperatingIncomeByGeographyTableTextBlock" id="iclr_OperatingIncomeByGeographyTableTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="OperatingIncomeLossBeforeRestructuringCharges" id="iclr_OperatingIncomeLossBeforeRestructuringCharges" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxLongTermFunding" id="iclr_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxLongTermFunding" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentLongTermFundingTax" id="iclr_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentLongTermFundingTax" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="OtherCountriesMember" id="iclr_OtherCountriesMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PaymentsForShareRepurchaseCosts" id="iclr_PaymentsForShareRepurchaseCosts" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PercentageOfFairMarketValue" id="iclr_PercentageOfFairMarketValue" type="num:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PreliminaryFairValuesOfAssetsAcquiredAndLiabilitiesAssumedRelatedToAcquisitionTextBlock" id="iclr_PreliminaryFairValuesOfAssetsAcquiredAndLiabilitiesAssumedRelatedToAcquisitionTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PriceSpectiveLlcMember" id="iclr_PriceSpectiveLlcMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PropertyPlantAndEquipmentByGeographyTableTextBlock" id="iclr_PropertyPlantAndEquipmentByGeographyTableTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ReconciliationOfProvisionOfIncomeTaxesLineItems" id="iclr_ReconciliationOfProvisionOfIncomeTaxesLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ReconciliationOfProvisionOfIncomeTaxesTable" id="iclr_ReconciliationOfProvisionOfIncomeTaxesTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
  <element name="RecoveryOfAmortizationOfGovernmentGrants" id="iclr_RecoveryOfAmortizationOfGovernmentGrants" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="RestOfEuropeMember" id="iclr_RestOfEuropeMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="RestrictedStockUnitsTwentyThirteenMember" id="iclr_RestrictedStockUnitsTwentyThirteenMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="RestrictedStockUnitsTwentyZeroEightMember" id="iclr_RestrictedStockUnitsTwentyZeroEightMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="RestructuringChargeNet" id="iclr_RestructuringChargeNet" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="RestructuringChargesTableTextBlock" id="iclr_RestructuringChargesTableTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="RestructuringFiscalTwentyTwelvePlanMember" id="iclr_RestructuringFiscalTwentyTwelvePlanMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="RevenuesByGeographyTextBlock" id="iclr_RevenuesByGeographyTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ScheduleOfDepreciationAndAmortizationExpenseByGeographicalAreaTableTextBlock" id="iclr_ScheduleOfDepreciationAndAmortizationExpenseByGeographicalAreaTableTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ScheduleOfNonCashStockCompensationExpenseTableTextBlock" id="iclr_ScheduleOfNonCashStockCompensationExpenseTableTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ScheduleOfTotalAssetsByGeographicAreaTableTextBlock" id="iclr_ScheduleOfTotalAssetsByGeographicAreaTableTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ScheduleOfWeightedAverageNumberOfDilutedSharesOutstandingLineItems" id="iclr_ScheduleOfWeightedAverageNumberOfDilutedSharesOutstandingLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ScheduleOfWeightedAverageNumberOfDilutedSharesOutstandingTable" id="iclr_ScheduleOfWeightedAverageNumberOfDilutedSharesOutstandingTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
  <element name="SegmentReportingDisclosureLineItems" id="iclr_SegmentReportingDisclosureLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="SegmentReportingDisclosureTable" id="iclr_SegmentReportingDisclosureTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCancelledAndForfeitedInPeriodWeightedAverageGrantDateFairValue" id="iclr_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCancelledAndForfeitedInPeriodWeightedAverageGrantDateFairValue" type="num:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisesInPeriod" id="iclr_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisesInPeriod" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisesInPeriodWeightedAverageGrantDateFairValue" id="iclr_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisesInPeriodWeightedAverageGrantDateFairValue" type="num:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsRollforwardAbstract" id="iclr_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsRollforwardAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndUnvestedNumber" id="iclr_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndUnvestedNumber" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndUnvestedWeightedAverageGrantDateFairValue" id="iclr_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndUnvestedWeightedAverageGrantDateFairValue" type="num:perShareItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsWeightedAverageGrantDateFairValueAbstract" id="iclr_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsWeightedAverageGrantDateFairValueAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardExpiryPeriodFromDateOfGrant" id="iclr_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpiryPeriodFromDateOfGrant" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardForfeitedInPeriodWeightedAverageGrantDateFairValue" id="iclr_ShareBasedCompensationArrangementByShareBasedPaymentAwardForfeitedInPeriodWeightedAverageGrantDateFairValue" type="num:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonvestedOptionsForfeitedInPeriod" id="iclr_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonvestedOptionsForfeitedInPeriod" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonvestedOptionsForfeitedInPeriodWeightedAverageExercisePrice" id="iclr_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonvestedOptionsForfeitedInPeriodWeightedAverageExercisePrice" type="num:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonvestedOptionsForfeitedInPeriodWeightedAverageGrantDateFairValue" id="iclr_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonvestedOptionsForfeitedInPeriodWeightedAverageGrantDateFairValue" type="num:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonvestedOptionsGrantedInPeriodWeightedAverageExercisePrice" id="iclr_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonvestedOptionsGrantedInPeriodWeightedAverageExercisePrice" type="num:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonvestedOptionsGrantedInPeriodWeightedAverageGrantDateFairValue" id="iclr_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonvestedOptionsGrantedInPeriodWeightedAverageGrantDateFairValue" type="num:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonvestedOptionsGrantsInPeriod" id="iclr_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonvestedOptionsGrantsInPeriod" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
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  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonvestedOptionsOutstandingNumber" id="iclr_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonvestedOptionsOutstandingNumber" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonvestedOptionsOutstandingWeightedAverageExercisePrice" id="iclr_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonvestedOptionsOutstandingWeightedAverageExercisePrice" type="num:perShareItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonvestedOptionsVestedInPeriod" id="iclr_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonvestedOptionsVestedInPeriod" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
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  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonvestedOptionsWeightedAverageGrantDateFairValue" id="iclr_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonvestedOptionsWeightedAverageGrantDateFairValue" type="num:perShareItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/>
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  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodFairValue" id="iclr_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodFairValue" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageOptionPrice" id="iclr_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageOptionPrice" type="num:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedRollForward" id="iclr_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedRollForward" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
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  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract" id="iclr_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
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  <element name="ShareBasedCompensationArrangementsByShareBasedPaymentAwardTextBlock" id="iclr_ShareBasedCompensationArrangementsByShareBasedPaymentAwardTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="TwentyTwelveRestructuringPlanMember" id="iclr_TwentyTwelveRestructuringPlanMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="UnrecognizedTaxBenefitsCurrentYearTaxPositions" id="iclr_UnrecognizedTaxBenefitsCurrentYearTaxPositions" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="WorkforceReductionMember" id="iclr_WorkforceReductionMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
</schema>





