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    <link:label id="lab_mms_PerformanceBasedContractsMember_E69EA1276C859246DB1AC500FB508578_documentation_en-US" xlink:label="lab_mms_PerformanceBasedContractsMember_E69EA1276C859246DB1AC500FB508578" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Reflects the percentage that revenues during the period from performance-based contracts are to total revenues. May also reflect the percentage contribution the product made to operating results. Risk is materially adverse effects of a loss of sales of a significant product or line of products, which could occur upon loss of rights to sell, distribute or license others; loss of patent or copyright protection; or technological obsolescence.</link:label>
    <link:loc xlink:href="mms-20181231.xsd#mms_PerformanceBasedContractsMember" xlink:label="loc_mms_PerformanceBasedContractsMember_E69EA1276C859246DB1AC500FB508578" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mms_PerformanceBasedContractsMember_E69EA1276C859246DB1AC500FB508578" xlink:to="lab_mms_PerformanceBasedContractsMember_E69EA1276C859246DB1AC500FB508578" xlink:type="arc" />
    <link:label id="lab_mms_CostPlusContractsMember_33552EFD3BFD04D3441CC500FB5039F4_terseLabel_en-US" xlink:label="lab_mms_CostPlusContractsMember_33552EFD3BFD04D3441CC500FB5039F4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cost-plus</link:label>
    <link:label id="lab_mms_CostPlusContractsMember_33552EFD3BFD04D3441CC500FB5039F4_label_en-US" xlink:label="lab_mms_CostPlusContractsMember_33552EFD3BFD04D3441CC500FB5039F4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cost Plus Contracts [Member]</link:label>
    <link:label id="lab_mms_CostPlusContractsMember_33552EFD3BFD04D3441CC500FB5039F4_documentation_en-US" xlink:label="lab_mms_CostPlusContractsMember_33552EFD3BFD04D3441CC500FB5039F4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Reflects the percentage that revenues during the period from cost-plus contracts are to total revenues. May also reflect the percentage contribution the product made to operating results. Risk is materially adverse effects of a loss of sales of a significant product or line of products, which could occur upon loss of rights to sell, distribute or license others; loss of patent or copyright protection; or technological obsolescence.</link:label>
    <link:loc xlink:href="mms-20181231.xsd#mms_CostPlusContractsMember" xlink:label="loc_mms_CostPlusContractsMember_33552EFD3BFD04D3441CC500FB5039F4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mms_CostPlusContractsMember_33552EFD3BFD04D3441CC500FB5039F4" xlink:to="lab_mms_CostPlusContractsMember_33552EFD3BFD04D3441CC500FB5039F4" xlink:type="arc" />
    <link:label id="lab_us-gaap_FixedPriceContractMember_CC0E4CF4B3432427CD61C500FB554AB8_terseLabel_en-US" xlink:label="lab_us-gaap_FixedPriceContractMember_CC0E4CF4B3432427CD61C500FB554AB8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fixed price</link:label>
    <link:label id="lab_us-gaap_FixedPriceContractMember_CC0E4CF4B3432427CD61C500FB554AB8_label_en-US" xlink:label="lab_us-gaap_FixedPriceContractMember_CC0E4CF4B3432427CD61C500FB554AB8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fixed-price Contract [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FixedPriceContractMember" xlink:label="loc_us-gaap_FixedPriceContractMember_CC0E4CF4B3432427CD61C500FB554AB8" xlink:type="locator" />
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    <link:label id="lab_us-gaap_TimeAndMaterialsContractMember_3A5EA6F33B8A8672761AC500FB56042A_terseLabel_en-US" xlink:label="lab_us-gaap_TimeAndMaterialsContractMember_3A5EA6F33B8A8672761AC500FB56042A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Time and materials</link:label>
    <link:label id="lab_us-gaap_TimeAndMaterialsContractMember_3A5EA6F33B8A8672761AC500FB56042A_label_en-US" xlink:label="lab_us-gaap_TimeAndMaterialsContractMember_3A5EA6F33B8A8672761AC500FB56042A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Time-and-materials Contract [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TimeAndMaterialsContractMember" xlink:label="loc_us-gaap_TimeAndMaterialsContractMember_3A5EA6F33B8A8672761AC500FB56042A" xlink:type="locator" />
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    <link:label id="lab_srt_MajorCustomersAxis_235063F25DAAEC649BDEC500FB567A8D_terseLabel_en-US" xlink:label="lab_srt_MajorCustomersAxis_235063F25DAAEC649BDEC500FB567A8D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Customer [Axis]</link:label>
    <link:label id="lab_srt_MajorCustomersAxis_235063F25DAAEC649BDEC500FB567A8D_label_en-US" xlink:label="lab_srt_MajorCustomersAxis_235063F25DAAEC649BDEC500FB567A8D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Customer [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MajorCustomersAxis" xlink:label="loc_srt_MajorCustomersAxis_235063F25DAAEC649BDEC500FB567A8D" xlink:type="locator" />
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    <link:label id="lab_srt_NameOfMajorCustomerDomain_F19327588AF201491ACFC500FB565BA6_terseLabel_en-US" xlink:label="lab_srt_NameOfMajorCustomerDomain_F19327588AF201491ACFC500FB565BA6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Customer [Domain]</link:label>
    <link:label id="lab_srt_NameOfMajorCustomerDomain_F19327588AF201491ACFC500FB565BA6_label_en-US" xlink:label="lab_srt_NameOfMajorCustomerDomain_F19327588AF201491ACFC500FB565BA6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Customer [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_NameOfMajorCustomerDomain" xlink:label="loc_srt_NameOfMajorCustomerDomain_F19327588AF201491ACFC500FB565BA6" xlink:type="locator" />
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    <link:label id="lab_mms_TotalUnitedStatesStateGovernmentAgenciesMember_357B53B8DBF3CC1052C1C500FB579314_terseLabel_en-US" xlink:label="lab_mms_TotalUnitedStatesStateGovernmentAgenciesMember_357B53B8DBF3CC1052C1C500FB579314" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total U.S. state government agencies</link:label>
    <link:label id="lab_mms_TotalUnitedStatesStateGovernmentAgenciesMember_357B53B8DBF3CC1052C1C500FB579314_label_en-US" xlink:label="lab_mms_TotalUnitedStatesStateGovernmentAgenciesMember_357B53B8DBF3CC1052C1C500FB579314" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Total United States State Government Agencies [Member]</link:label>
    <link:label id="lab_mms_TotalUnitedStatesStateGovernmentAgenciesMember_357B53B8DBF3CC1052C1C500FB579314_documentation_en-US" xlink:label="lab_mms_TotalUnitedStatesStateGovernmentAgenciesMember_357B53B8DBF3CC1052C1C500FB579314" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Total United States State Government Agencies [Member]</link:label>
    <link:loc xlink:href="mms-20181231.xsd#mms_TotalUnitedStatesStateGovernmentAgenciesMember" xlink:label="loc_mms_TotalUnitedStatesStateGovernmentAgenciesMember_357B53B8DBF3CC1052C1C500FB579314" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mms_TotalUnitedStatesStateGovernmentAgenciesMember_357B53B8DBF3CC1052C1C500FB579314" xlink:to="lab_mms_TotalUnitedStatesStateGovernmentAgenciesMember_357B53B8DBF3CC1052C1C500FB579314" xlink:type="arc" />
    <link:label id="lab_mms_NewYorkStateGovernmentAgenciesMember_4ADA81D97F01EB4DC841C500FB5712F2_terseLabel_en-US" xlink:label="lab_mms_NewYorkStateGovernmentAgenciesMember_4ADA81D97F01EB4DC841C500FB5712F2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">New York State government agencies</link:label>
    <link:label id="lab_mms_NewYorkStateGovernmentAgenciesMember_4ADA81D97F01EB4DC841C500FB5712F2_label_en-US" xlink:label="lab_mms_NewYorkStateGovernmentAgenciesMember_4ADA81D97F01EB4DC841C500FB5712F2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">New York State Government Agencies [Member]</link:label>
    <link:label id="lab_mms_NewYorkStateGovernmentAgenciesMember_4ADA81D97F01EB4DC841C500FB5712F2_documentation_en-US" xlink:label="lab_mms_NewYorkStateGovernmentAgenciesMember_4ADA81D97F01EB4DC841C500FB5712F2" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">New York State Government Agencies [Member]</link:label>
    <link:loc xlink:href="mms-20181231.xsd#mms_NewYorkStateGovernmentAgenciesMember" xlink:label="loc_mms_NewYorkStateGovernmentAgenciesMember_4ADA81D97F01EB4DC841C500FB5712F2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mms_NewYorkStateGovernmentAgenciesMember_4ADA81D97F01EB4DC841C500FB5712F2" xlink:to="lab_mms_NewYorkStateGovernmentAgenciesMember_4ADA81D97F01EB4DC841C500FB5712F2" xlink:type="arc" />
    <link:label id="lab_mms_OtherUnitedStatesStateGovernmentAgenciesMember_66F7EF036E2FC41D61D9C500FB57ECB9_terseLabel_en-US" xlink:label="lab_mms_OtherUnitedStatesStateGovernmentAgenciesMember_66F7EF036E2FC41D61D9C500FB57ECB9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other U.S. state government agencies</link:label>
    <link:label id="lab_mms_OtherUnitedStatesStateGovernmentAgenciesMember_66F7EF036E2FC41D61D9C500FB57ECB9_label_en-US" xlink:label="lab_mms_OtherUnitedStatesStateGovernmentAgenciesMember_66F7EF036E2FC41D61D9C500FB57ECB9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other United States State Government Agencies [Member]</link:label>
    <link:label id="lab_mms_OtherUnitedStatesStateGovernmentAgenciesMember_66F7EF036E2FC41D61D9C500FB57ECB9_documentation_en-US" xlink:label="lab_mms_OtherUnitedStatesStateGovernmentAgenciesMember_66F7EF036E2FC41D61D9C500FB57ECB9" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Other United States State Government Agencies [Member]</link:label>
    <link:loc xlink:href="mms-20181231.xsd#mms_OtherUnitedStatesStateGovernmentAgenciesMember" xlink:label="loc_mms_OtherUnitedStatesStateGovernmentAgenciesMember_66F7EF036E2FC41D61D9C500FB57ECB9" xlink:type="locator" />
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    <link:label id="lab_mms_UnitedStatesFederalGovernmentAgenciesMember_A7D7D2ECE1A17B3BE07FC500FB57F01B_terseLabel_en-US" xlink:label="lab_mms_UnitedStatesFederalGovernmentAgenciesMember_A7D7D2ECE1A17B3BE07FC500FB57F01B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">United States Federal Government agencies</link:label>
    <link:label id="lab_mms_UnitedStatesFederalGovernmentAgenciesMember_A7D7D2ECE1A17B3BE07FC500FB57F01B_label_en-US" xlink:label="lab_mms_UnitedStatesFederalGovernmentAgenciesMember_A7D7D2ECE1A17B3BE07FC500FB57F01B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">United States Federal Government Agencies [Member]</link:label>
    <link:label id="lab_mms_UnitedStatesFederalGovernmentAgenciesMember_A7D7D2ECE1A17B3BE07FC500FB57F01B_documentation_en-US" xlink:label="lab_mms_UnitedStatesFederalGovernmentAgenciesMember_A7D7D2ECE1A17B3BE07FC500FB57F01B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">United States Federal Government Agencies [Member]</link:label>
    <link:loc xlink:href="mms-20181231.xsd#mms_UnitedStatesFederalGovernmentAgenciesMember" xlink:label="loc_mms_UnitedStatesFederalGovernmentAgenciesMember_A7D7D2ECE1A17B3BE07FC500FB57F01B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mms_UnitedStatesFederalGovernmentAgenciesMember_A7D7D2ECE1A17B3BE07FC500FB57F01B" xlink:to="lab_mms_UnitedStatesFederalGovernmentAgenciesMember_A7D7D2ECE1A17B3BE07FC500FB57F01B" xlink:type="arc" />
    <link:label id="lab_mms_InternationalGovernmentAgenciesMember_4B99CEA2D0220C8CCB7EC500FB5890BE_terseLabel_en-US" xlink:label="lab_mms_InternationalGovernmentAgenciesMember_4B99CEA2D0220C8CCB7EC500FB5890BE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">International government agencies</link:label>
    <link:label id="lab_mms_InternationalGovernmentAgenciesMember_4B99CEA2D0220C8CCB7EC500FB5890BE_label_en-US" xlink:label="lab_mms_InternationalGovernmentAgenciesMember_4B99CEA2D0220C8CCB7EC500FB5890BE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">International Government Agencies [Member]</link:label>
    <link:label id="lab_mms_InternationalGovernmentAgenciesMember_4B99CEA2D0220C8CCB7EC500FB5890BE_documentation_en-US" xlink:label="lab_mms_InternationalGovernmentAgenciesMember_4B99CEA2D0220C8CCB7EC500FB5890BE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">International Government Agencies [Member]</link:label>
    <link:loc xlink:href="mms-20181231.xsd#mms_InternationalGovernmentAgenciesMember" xlink:label="loc_mms_InternationalGovernmentAgenciesMember_4B99CEA2D0220C8CCB7EC500FB5890BE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mms_InternationalGovernmentAgenciesMember_4B99CEA2D0220C8CCB7EC500FB5890BE" xlink:to="lab_mms_InternationalGovernmentAgenciesMember_4B99CEA2D0220C8CCB7EC500FB5890BE" xlink:type="arc" />
    <link:label id="lab_mms_OtherIncludingLocalMunicipalitiesAndCommercialCustomersMember_65B2846F87A4A77244F1C500FB587469_terseLabel_en-US" xlink:label="lab_mms_OtherIncludingLocalMunicipalitiesAndCommercialCustomersMember_65B2846F87A4A77244F1C500FB587469" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other, including local municipalities and commercial customers</link:label>
    <link:label id="lab_mms_OtherIncludingLocalMunicipalitiesAndCommercialCustomersMember_65B2846F87A4A77244F1C500FB587469_label_en-US" xlink:label="lab_mms_OtherIncludingLocalMunicipalitiesAndCommercialCustomersMember_65B2846F87A4A77244F1C500FB587469" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other, Including Local Municipalities And Commercial Customers [Member]</link:label>
    <link:label id="lab_mms_OtherIncludingLocalMunicipalitiesAndCommercialCustomersMember_65B2846F87A4A77244F1C500FB587469_documentation_en-US" xlink:label="lab_mms_OtherIncludingLocalMunicipalitiesAndCommercialCustomersMember_65B2846F87A4A77244F1C500FB587469" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Other, Including Local Municipalities And Commercial Customers [Member]</link:label>
    <link:loc xlink:href="mms-20181231.xsd#mms_OtherIncludingLocalMunicipalitiesAndCommercialCustomersMember" xlink:label="loc_mms_OtherIncludingLocalMunicipalitiesAndCommercialCustomersMember_65B2846F87A4A77244F1C500FB587469" xlink:type="locator" />
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    <link:label id="lab_srt_StatementGeographicalAxis_59EC9CE6A0E45DF2CFBDC500FB58BCE9_terseLabel_en-US" xlink:label="lab_srt_StatementGeographicalAxis_59EC9CE6A0E45DF2CFBDC500FB58BCE9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Geographical [Axis]</link:label>
    <link:label id="lab_srt_StatementGeographicalAxis_59EC9CE6A0E45DF2CFBDC500FB58BCE9_label_en-US" xlink:label="lab_srt_StatementGeographicalAxis_59EC9CE6A0E45DF2CFBDC500FB58BCE9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Geographical [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_StatementGeographicalAxis" xlink:label="loc_srt_StatementGeographicalAxis_59EC9CE6A0E45DF2CFBDC500FB58BCE9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_StatementGeographicalAxis_59EC9CE6A0E45DF2CFBDC500FB58BCE9" xlink:to="lab_srt_StatementGeographicalAxis_59EC9CE6A0E45DF2CFBDC500FB58BCE9" xlink:type="arc" />
    <link:label id="lab_srt_SegmentGeographicalDomain_42435C2BC53CA55FB055C500FB588559_terseLabel_en-US" xlink:label="lab_srt_SegmentGeographicalDomain_42435C2BC53CA55FB055C500FB588559" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Geographical [Domain]</link:label>
    <link:label id="lab_srt_SegmentGeographicalDomain_42435C2BC53CA55FB055C500FB588559_label_en-US" xlink:label="lab_srt_SegmentGeographicalDomain_42435C2BC53CA55FB055C500FB588559" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Geographical [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_SegmentGeographicalDomain" xlink:label="loc_srt_SegmentGeographicalDomain_42435C2BC53CA55FB055C500FB588559" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_SegmentGeographicalDomain_42435C2BC53CA55FB055C500FB588559" xlink:to="lab_srt_SegmentGeographicalDomain_42435C2BC53CA55FB055C500FB588559" xlink:type="arc" />
    <link:label id="lab_country_US_A52F0F1F754259B97ADFC500FB59CCBA_terseLabel_en-US" xlink:label="lab_country_US_A52F0F1F754259B97ADFC500FB59CCBA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">United States of America</link:label>
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