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  <xsd:element abstract="true" id="mdca_Series4ConvertiblePreferredStockMember" name="Series4ConvertiblePreferredStockMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mdca_Series6ConvertiblePreferredSharesMember" name="Series6ConvertiblePreferredSharesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mdca_ServicesProvidedBySubisidiaryMember" name="ServicesProvidedBySubisidiaryMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mdca_ShareCapitalAbstract" name="ShareCapitalAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mdca_ShareCapitalLineItems" name="ShareCapitalLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mdca_ShareCapitalTable" name="ShareCapitalTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mdca_SloaneandCompanyLLCMember" name="SloaneandCompanyLLCMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mdca_StagwellSubsidiaryMember" name="StagwellSubsidiaryMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="mdca_StockIssuedDuringPeriodSharesIssuedForServicesConvertiblePreferredShares" name="StockIssuedDuringPeriodSharesIssuedForServicesConvertiblePreferredShares" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mdca_TechnologyMember" name="TechnologyMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mdca_TerminationdisabilityordeathMember" name="TerminationdisabilityordeathMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mdca_TheCompanyMember" name="TheCompanyMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mdca_TransportationandTravelLodgingMember" name="TransportationandTravelLodgingMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mdca_VestingoverperiodMember" name="VestingoverperiodMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mdca_WeightedAverageNumberOfSharesOutstandingForBasicAndDilutedAbstract" name="WeightedAverageNumberOfSharesOutstandingForBasicAndDilutedAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="mdca_WellsFargoCapitalFinanceLlcMember" name="WellsFargoCapitalFinanceLlcMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
</xsd:schema>
