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    </appinfo>
  </annotation>
  <import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" />
  <import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" />
  <import namespace="http://fasb.org/us-roles/2012-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2012/elts/us-roles-2012-01-31.xsd" />
  <import namespace="http://xbrl.sec.gov/dei/2012-01-31" schemaLocation="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd" />
  <import namespace="http://www.xbrl.org/dtr/type/non-numeric" schemaLocation="http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd" />
  <import namespace="http://www.xbrl.org/2009/role/negated" schemaLocation="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd" />
  <import namespace="http://fasb.org/us-gaap/2012-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd" />
  <import namespace="http://xbrl.sec.gov/exch/2012-01-31" schemaLocation="http://xbrl.sec.gov/exch/2012/exch-2012-01-31.xsd" />
  <import namespace="http://xbrl.sec.gov/country/2012-01-31" schemaLocation="http://xbrl.sec.gov/country/2012/country-2012-01-31.xsd" />
  <import namespace="http://www.xbrl.org/dtr/type/numeric" schemaLocation="http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd" />
  <import namespace="http://xbrl.sec.gov/invest/2012-01-31" schemaLocation="http://xbrl.sec.gov/invest/2012/invest-2012-01-31.xsd" />
  <element id="hsii_TreasuryAndCommonStockTransactions" name="TreasuryAndCommonStockTransactions" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hsii_DividendEquivalentsOnRestrictedStockUnits" name="DividendEquivalentsOnRestrictedStockUnits" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="hsii_DocumentAndEntityInformationAbstract" name="DocumentAndEntityInformationAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hsii_RestrictedCashTextualAbstract" name="RestrictedCashTextualAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hsii_WarrantsAndEquitySecuritiesMember" name="WarrantsAndEquitySecuritiesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hsii_InvestmentsTextualAbstract" name="InvestmentsTextualAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hsii_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestedAndConvertedToCommonStock" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardVestedAndConvertedToCommonStock" type="num:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hsii_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestedAndConvertedToCommonStockShares" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardVestedAndConvertedToCommonStockShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hsii_StockBasedCompensationTextualAbstract" name="StockBasedCompensationTextualAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hsii_EuropeMember" name="EuropeMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hsii_AsiaPacificMember" name="AsiaPacificMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hsii_CandidateDatabaseMember" name="CandidateDatabaseMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hsii_GoodwillAndOtherIntangibleAssetsTextualAbstract" name="GoodwillAndOtherIntangibleAssetsTextualAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hsii_OfficeRelatedMember" name="OfficeRelatedMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hsii_RestructuringChargesTextualAbstract" name="RestructuringChargesTextualAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hsii_ComponentsOfOtherCurrentLiabilitiesTableTextBlock" name="ComponentsOfOtherCurrentLiabilitiesTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hsii_ComponentsOfOtherNonCurrentLiabilitiesTableTextBlock" name="ComponentsOfOtherNonCurrentLiabilitiesTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hsii_ComponentsOfOtherCurrentLiabilitiesAbstract" name="ComponentsOfOtherCurrentLiabilitiesAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hsii_IncomeTaxesTextualAbstract" name="IncomeTaxesTextualAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hsii_AdjustedFullYearExpectedAnnualizedTaxRate" name="AdjustedFullYearExpectedAnnualizedTaxRate" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hsii_GlobalOperationsSupportMember" name="GlobalOperationsSupportMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hsii_OperatingIncomeBeforeRestructuringChargesImpairmentChargesAndOtherOperatingIncome" name="OperatingIncomeBeforeRestructuringChargesImpairmentChargesAndOtherOperatingIncome" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="hsii_AllRegionsMember" name="AllRegionsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hsii_SegmentInformationTextualAbstract" name="SegmentInformationTextualAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hsii_GuaranteesTextualAbstract" name="GuaranteesTextualAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hsii_CommitmentsAndContingenciesTextualAbstract" name="CommitmentsAndContingenciesTextualAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hsii_ComponentOfNetPeriodicBenefitCostAbstract" name="ComponentOfNetPeriodicBenefitCostAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hsii_RestrictedCashInSupportOfLeaseGuarantees" name="RestrictedCashInSupportOfLeaseGuarantees" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="hsii_AggregateCostBasisForNonQualifiedDeferredCompensationPlan" name="AggregateCostBasisForNonQualifiedDeferredCompensationPlan" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="hsii_AccruedRestructuringChargesCurrent" name="AccruedRestructuringChargesCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="hsii_OtherCurrentLiabilitiesOther" name="OtherCurrentLiabilitiesOther" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="hsii_OtherNonCurrentLiabilitiesOther" name="OtherNonCurrentLiabilitiesOther" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="hsii_GroupOneMember" name="GroupOneMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hsii_GoodwillAndOtherIntangibleAssetsNetAbstract" name="GoodwillAndOtherIntangibleAssetsNetAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hsii_InformationWithRespectToStockBasedCompensationAbstract" name="InformationWithRespectToStockBasedCompensationAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hsii_InvestmentsTableTextBlock" name="InvestmentsTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hsii_IdentifiableAssetsAndGoodwillAndOtherIntangibleAssetsAbstract" name="IdentifiableAssetsAndGoodwillAndOtherIntangibleAssetsAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hsii_IdentifiableAssetsAndGoodwillAndOtherIntangibleAssetsNetByGeographicalSegmentTableTextBlock" name="IdentifiableAssetsAndGoodwillAndOtherIntangibleAssetsNetByGeographicalSegmentTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hsii_RevenueAndOperatingIncomeLossDepreciationAndAmortizationAndCapitalExpendituresByGeographicalSegmentTableTextBlock" name="RevenueAndOperatingIncomeLossDepreciationAndAmortizationAndCapitalExpendituresByGeographicalSegmentTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hsii_ComputerEquipmentAndSoftwareMember" name="ComputerEquipmentAndSoftwareMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hsii_AccruedSalariesAndEmployeeBenefitsNoncurrent" name="AccruedSalariesAndEmployeeBenefitsNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="hsii_SummaryOfAllowanceForDoubtfulAbstract" name="SummaryOfAllowanceForDoubtfulAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hsii_CurrencyInContextOfAllowanceForDoubtful" name="CurrencyInContextOfAllowanceForDoubtful" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="hsii_PriorProgramMember" name="PriorProgramMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hsii_TwoThousandTwelveProgramMember" name="TwoThousandTwelveProgramMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hsii_PropertyAndEquipmentTextualAbstract" name="PropertyAndEquipmentTextualAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hsii_RevenueAbstract" name="RevenueAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hsii_UsNonQualifiedDeferredCompensationPlanMember" name="UsNonQualifiedDeferredCompensationPlanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hsii_OtherCurrentAndNonCurrentLiabilitiesAbstract" name="OtherCurrentAndNonCurrentLiabilitiesAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hsii_AccruedPremisesRelatedCostNonCurrent" name="AccruedPremisesRelatedCostNonCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="hsii_AmericaMember" name="AmericaMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="hsii_CapitalExpendituresAbstract" name="CapitalExpendituresAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
</schema>
