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    <link:label id="lab_vec_DebtInstrumentMandatoryPrepaymentTermsPercentageofBorrowersExcessCashFlowStepdownLeverageRatioOne_4CD0D41AEA9018804DE324F0EF08EA87_documentation_en-US" xlink:label="lab_vec_DebtInstrumentMandatoryPrepaymentTermsPercentageofBorrowersExcessCashFlowStepdownLeverageRatioOne_4CD0D41AEA9018804DE324F0EF08EA87" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Twenty Five Percent of Borrower's excess cash flows required to be paid of certain leverage ratios are met</link:label>
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    <link:label id="lab_vec_DebtInstrumentMandatoryPrepaymentTermsPercentageofBorrowersExcessCashFlowStepdownLeverageRatioTwo_5DD89A61F0C9289B03E524F0EF08FD38_documentation_en-US" xlink:label="lab_vec_DebtInstrumentMandatoryPrepaymentTermsPercentageofBorrowersExcessCashFlowStepdownLeverageRatioTwo_5DD89A61F0C9289B03E524F0EF08FD38" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Zero Percent of Borrower's excess cash flows required to be paid if certain leverage ratios are met</link:label>
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    <link:label id="lab_vec_LineofCreditFacilityCovenantTermsMaximumAllowedDividendDistribution_7317D52F9AA51FE7654C24F0EF08F9AA_terseLabel_en-US" xlink:label="lab_vec_LineofCreditFacilityCovenantTermsMaximumAllowedDividendDistribution_7317D52F9AA51FE7654C24F0EF08F9AA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Maximum allowed dividend distribution</link:label>
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    <link:loc xlink:href="vec-20161231.xsd#vec_LineofCreditFacilityCovenantTermsMaximumAllowedDividendDistribution" xlink:label="loc_vec_LineofCreditFacilityCovenantTermsMaximumAllowedDividendDistribution_7317D52F9AA51FE7654C24F0EF08F9AA" xlink:type="locator" />
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    <link:label id="lab_vec_LineofCreditFacilityCovenantTermsMaximumDebttoEBITDARatio_1F23391BF2C55CF9647024F0EF080DF2_terseLabel_en-US" xlink:label="lab_vec_LineofCreditFacilityCovenantTermsMaximumDebttoEBITDARatio_1F23391BF2C55CF9647024F0EF080DF2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Covenant terms, ratio of total indebtedness to combined EBITDA</link:label>
    <link:label id="lab_vec_LineofCreditFacilityCovenantTermsMaximumDebttoEBITDARatio_1F23391BF2C55CF9647024F0EF080DF2_label_en-US" xlink:label="lab_vec_LineofCreditFacilityCovenantTermsMaximumDebttoEBITDARatio_1F23391BF2C55CF9647024F0EF080DF2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit Facility, Covenant Terms, Maximum Debt to EBITDA Ratio</link:label>
    <link:label id="lab_vec_LineofCreditFacilityCovenantTermsMaximumDebttoEBITDARatio_1F23391BF2C55CF9647024F0EF080DF2_documentation_en-US" xlink:label="lab_vec_LineofCreditFacilityCovenantTermsMaximumDebttoEBITDARatio_1F23391BF2C55CF9647024F0EF080DF2" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Line of Credit Facility, Covenant Terms, Maximum Debt to EBITDA Ratio</link:label>
    <link:loc xlink:href="vec-20161231.xsd#vec_LineofCreditFacilityCovenantTermsMaximumDebttoEBITDARatio" xlink:label="loc_vec_LineofCreditFacilityCovenantTermsMaximumDebttoEBITDARatio_1F23391BF2C55CF9647024F0EF080DF2" xlink:type="locator" />
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    <link:label id="lab_vec_LineofCreditCovenantTermsMinimumEBITDAtoInterestExpenseRatio_AB528797797119E15FDC24F0EF08ED09_terseLabel_en-US" xlink:label="lab_vec_LineofCreditCovenantTermsMinimumEBITDAtoInterestExpenseRatio_AB528797797119E15FDC24F0EF08ED09" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Covenant terms, ratio of combined EBITDA to combined interest expense</link:label>
    <link:label id="lab_vec_LineofCreditCovenantTermsMinimumEBITDAtoInterestExpenseRatio_AB528797797119E15FDC24F0EF08ED09_label_en-US" xlink:label="lab_vec_LineofCreditCovenantTermsMinimumEBITDAtoInterestExpenseRatio_AB528797797119E15FDC24F0EF08ED09" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit, Covenant Terms, Minimum EBITDA to Interest Expense Ratio</link:label>
    <link:label id="lab_vec_LineofCreditCovenantTermsMinimumEBITDAtoInterestExpenseRatio_AB528797797119E15FDC24F0EF08ED09_documentation_en-US" xlink:label="lab_vec_LineofCreditCovenantTermsMinimumEBITDAtoInterestExpenseRatio_AB528797797119E15FDC24F0EF08ED09" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Debt Instrument, Covenant Terms, Minimum EBITDA to Interest Expense Ratio</link:label>
    <link:loc xlink:href="vec-20161231.xsd#vec_LineofCreditCovenantTermsMinimumEBITDAtoInterestExpenseRatio" xlink:label="loc_vec_LineofCreditCovenantTermsMinimumEBITDAtoInterestExpenseRatio_AB528797797119E15FDC24F0EF08ED09" xlink:type="locator" />
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    <link:label id="lab_vec_DebtInstrumentCovenantComplianceDebttoEBITDARatio_F483A3DF1107CF89A04624F0EF085466_terseLabel_en-US" xlink:label="lab_vec_DebtInstrumentCovenantComplianceDebttoEBITDARatio_F483A3DF1107CF89A04624F0EF085466" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Ratio of total indebtedness to combined EBITDA</link:label>
    <link:label id="lab_vec_DebtInstrumentCovenantComplianceDebttoEBITDARatio_F483A3DF1107CF89A04624F0EF085466_label_en-US" xlink:label="lab_vec_DebtInstrumentCovenantComplianceDebttoEBITDARatio_F483A3DF1107CF89A04624F0EF085466" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Covenant Compliance, Debt to EBITDA Ratio</link:label>
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    <link:label id="lab_vec_DebtInstrumentCovenantComplianceEBITDAtoInterestExpenseRatio_C3884093789DB03BC8A324F0EF08AD04_terseLabel_en-US" xlink:label="lab_vec_DebtInstrumentCovenantComplianceEBITDAtoInterestExpenseRatio_C3884093789DB03BC8A324F0EF08AD04" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Ratio of combined EBITDA to combined interest expense</link:label>
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    <link:label id="lab_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_A808A45CE47D283FD2F124F0EF0905AE_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_A808A45CE47D283FD2F124F0EF0905AE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Spread on variable rate</link:label>
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    <link:label id="lab_us-gaap_NetIncomeLoss_538CC9F4A5CA36CFB1A37495CBC23A2A_label_en-US" xlink:label="lab_us-gaap_NetIncomeLoss_538CC9F4A5CA36CFB1A37495CBC23A2A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Income (Loss) Attributable to Parent</link:label>
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    <link:label id="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_628A116E538D66389E787495CBC22013_label_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_628A116E538D66389E787495CBC22013" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Weighted Average Number of Shares Outstanding, Basic</link:label>
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    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentUsefulLife_F04EAC0FAE951B5531DD8769BC7F6393_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentUsefulLife_F04EAC0FAE951B5531DD8769BC7F6393" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Estimated useful life</link:label>
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    <link:label id="lab_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_CE11EC8B8879C94A7557B7354DE5278A_terseLabel_en-US" xlink:label="lab_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_CE11EC8B8879C94A7557B7354DE5278A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stock-Based Compensation</link:label>
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    <link:label id="lab_us-gaap_OperatingLeasesRentExpenseNet_A34B500BF1E3BD8D77B6750410ECAD8D_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesRentExpenseNet_A34B500BF1E3BD8D77B6750410ECAD8D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Operating leases, rental expenses</link:label>
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    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_532D02C4E967DE2D1B2F750410EC2E66_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_532D02C4E967DE2D1B2F750410EC2E66" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2018</link:label>
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    <link:label id="lab_us-gaap_ShareBasedCompensation_04F6EEFD7165D6FD325A8B54CB9C75C0_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensation_04F6EEFD7165D6FD325A8B54CB9C75C0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stock-based compensation</link:label>
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    <link:label id="lab_us-gaap_SharePrice_27E59597837FA2617AD98A65B93F17FB_label_en-US" xlink:label="lab_us-gaap_SharePrice_27E59597837FA2617AD98A65B93F17FB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share Price</link:label>
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    <link:label id="lab_vec_SharebasedCompensationArrangementbySharebasedPaymentAwardOutoftheMoneyOptionsExercisableNumber_53D2F562597A90EE2FD38A65B93F9AE6_terseLabel_en-US" xlink:label="lab_vec_SharebasedCompensationArrangementbySharebasedPaymentAwardOutoftheMoneyOptionsExercisableNumber_53D2F562597A90EE2FD38A65B93F9AE6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of exercisable options, out of the money (less than 0.1 million)</link:label>
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    <link:label id="lab_vec_SharebasedCompensationArrangementbySharebasedPaymentAwardOutoftheMoneyOptionsExercisableNumber_53D2F562597A90EE2FD38A65B93F9AE6_documentation_en-US" xlink:label="lab_vec_SharebasedCompensationArrangementbySharebasedPaymentAwardOutoftheMoneyOptionsExercisableNumber_53D2F562597A90EE2FD38A65B93F9AE6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Out of the Money Options, Exercisable, Number</link:label>
    <link:loc xlink:href="vec-20161231.xsd#vec_SharebasedCompensationArrangementbySharebasedPaymentAwardOutoftheMoneyOptionsExercisableNumber" xlink:label="loc_vec_SharebasedCompensationArrangementbySharebasedPaymentAwardOutoftheMoneyOptionsExercisableNumber_53D2F562597A90EE2FD38A65B93F9AE6" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_8E6003BE0444CF313C208A65B93F812B_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_8E6003BE0444CF313C208A65B93F812B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Options exercised in period, intrinsic value</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_8E6003BE0444CF313C208A65B93F812B_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_8E6003BE0444CF313C208A65B93F812B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_8E6003BE0444CF313C208A65B93F812B" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_B80BA0BD7ED64FF664068A65B93FD9B5_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_B80BA0BD7ED64FF664068A65B93FD9B5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Vested or expected to vest</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_B80BA0BD7ED64FF664068A65B93FD9B5_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_B80BA0BD7ED64FF664068A65B93FD9B5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_B80BA0BD7ED64FF664068A65B93FD9B5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_B80BA0BD7ED64FF664068A65B93FD9B5" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_B80BA0BD7ED64FF664068A65B93FD9B5" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_746992473F85989B3EBD8A65B93FC1D0_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_746992473F85989B3EBD8A65B93FC1D0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Vested or expected to vest, weighted average exercise price (in dollars per share)</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_746992473F85989B3EBD8A65B93FC1D0_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_746992473F85989B3EBD8A65B93FC1D0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_746992473F85989B3EBD8A65B93FC1D0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_746992473F85989B3EBD8A65B93FC1D0" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_746992473F85989B3EBD8A65B93FC1D0" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_5531A07FC52504145AC58A65B93F4DF4_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_5531A07FC52504145AC58A65B93F4DF4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Vested or expected to vest, aggregate intrinsic value</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_5531A07FC52504145AC58A65B93F4DF4_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_5531A07FC52504145AC58A65B93F4DF4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_5531A07FC52504145AC58A65B93F4DF4" xlink:type="locator" />
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    <link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1_148872E33F2482EB2BAA8A65B93FA934_terseLabel_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1_148872E33F2482EB2BAA8A65B93FA934" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Vested or expected to vest, weighted average remaining contractual life</link:label>
    <link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1_148872E33F2482EB2BAA8A65B93FA934_label_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1_148872E33F2482EB2BAA8A65B93FA934" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term</link:label>
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    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1_148872E33F2482EB2BAA8A65B93FA934" xlink:to="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1_148872E33F2482EB2BAA8A65B93FA934" xlink:type="arc" />
    <link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_AC33B90EA1A8C68DE9D48A65B940547E_verboseLabel_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_AC33B90EA1A8C68DE9D48A65B940547E" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Expected life</link:label>
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    <link:label id="lab_vec_NetParentCompanyEquityMember_81C17FAB8A4E9B72ED1D8B54CB6D7539_terseLabel_en-US" xlink:label="lab_vec_NetParentCompanyEquityMember_81C17FAB8A4E9B72ED1D8B54CB6D7539" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net Parent Company Equity</link:label>
    <link:label id="lab_vec_NetParentCompanyEquityMember_81C17FAB8A4E9B72ED1D8B54CB6D7539_label_en-US" xlink:label="lab_vec_NetParentCompanyEquityMember_81C17FAB8A4E9B72ED1D8B54CB6D7539" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Parent Company Equity [Member]</link:label>
    <link:label id="lab_vec_NetParentCompanyEquityMember_81C17FAB8A4E9B72ED1D8B54CB6D7539_documentation_en-US" xlink:label="lab_vec_NetParentCompanyEquityMember_81C17FAB8A4E9B72ED1D8B54CB6D7539" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Net Parent Company Equity [Member]</link:label>
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    <link:label id="lab_us-gaap_StatementLineItems_43A99F4DC369950715B88B54CB6DD8A8_terseLabel_en-US" xlink:label="lab_us-gaap_StatementLineItems_43A99F4DC369950715B88B54CB6DD8A8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Statement [Line Items]</link:label>
    <link:label id="lab_us-gaap_StatementLineItems_43A99F4DC369950715B88B54CB6DD8A8_label_en-US" xlink:label="lab_us-gaap_StatementLineItems_43A99F4DC369950715B88B54CB6DD8A8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement [Line Items]</link:label>
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    <link:label id="lab_us-gaap_StockholdersEquity_086D420E929DBD19B7678B54CB6D3B89_periodStartLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquity_086D420E929DBD19B7678B54CB6D3B89" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Balance</link:label>
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    <link:label id="lab_vec_NetParentCompanyEquityDecreasefromTransfertoParent_848BB7C3B317875A06BD8B54CB6DF48F_negatedTerseLabel_en-US" xlink:label="lab_vec_NetParentCompanyEquityDecreasefromTransfertoParent_848BB7C3B317875A06BD8B54CB6DF48F" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Transfer to former parent, net</link:label>
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    <link:label id="lab_vec_NetParentCompanyEquityDecreasefromTransfertoParent_848BB7C3B317875A06BD8B54CB6DF48F_documentation_en-US" xlink:label="lab_vec_NetParentCompanyEquityDecreasefromTransfertoParent_848BB7C3B317875A06BD8B54CB6DF48F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Net Parent Company Equity, Decrease from Transfer to Parent</link:label>
    <link:loc xlink:href="vec-20161231.xsd#vec_NetParentCompanyEquityDecreasefromTransfertoParent" xlink:label="loc_vec_NetParentCompanyEquityDecreasefromTransfertoParent_848BB7C3B317875A06BD8B54CB6DF48F" xlink:type="locator" />
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    <link:label id="lab_vec_NetParentCompanyEquityDecreasefromDistributiontoAffiliate_AFD7DD8858DDB26BEE558B54CB6D67BF_negatedLabel_en-US" xlink:label="lab_vec_NetParentCompanyEquityDecreasefromDistributiontoAffiliate_AFD7DD8858DDB26BEE558B54CB6D67BF" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Distribution to subsidiary of Exelis</link:label>
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    <link:label id="lab_vec_NetParentCompanyEquityDecreasefromDistributiontoAffiliate_AFD7DD8858DDB26BEE558B54CB6D67BF_documentation_en-US" xlink:label="lab_vec_NetParentCompanyEquityDecreasefromDistributiontoAffiliate_AFD7DD8858DDB26BEE558B54CB6D67BF" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Net Parent Company Equity, Decrease from Distribution to Affiliate</link:label>
    <link:loc xlink:href="vec-20161231.xsd#vec_NetParentCompanyEquityDecreasefromDistributiontoAffiliate" xlink:label="loc_vec_NetParentCompanyEquityDecreasefromDistributiontoAffiliate_AFD7DD8858DDB26BEE558B54CB6D67BF" xlink:type="locator" />
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    <link:label id="lab_vec_NetParentCompanyEquitySpinoffAdjustments_D9C0CA2F92A02EAA65178B54CB6D0222_negatedTerseLabel_en-US" xlink:label="lab_vec_NetParentCompanyEquitySpinoffAdjustments_D9C0CA2F92A02EAA65178B54CB6D0222" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Spin-off related adjustments</link:label>
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    <link:label id="lab_vec_NetParentCompanyEquitySpinoffAdjustments_D9C0CA2F92A02EAA65178B54CB6D0222_documentation_en-US" xlink:label="lab_vec_NetParentCompanyEquitySpinoffAdjustments_D9C0CA2F92A02EAA65178B54CB6D0222" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Net Parent Company Equity, Spin-off Adjustments</link:label>
    <link:loc xlink:href="vec-20161231.xsd#vec_NetParentCompanyEquitySpinoffAdjustments" xlink:label="loc_vec_NetParentCompanyEquitySpinoffAdjustments_D9C0CA2F92A02EAA65178B54CB6D0222" xlink:type="locator" />
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    <link:label id="lab_us-gaap_OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent_F0EB69DCAACF8F2241E48B54CB6D8D4C_terseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent_F0EB69DCAACF8F2241E48B54CB6D8D4C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unrealized (loss) gain on cash flow hedge</link:label>
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    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesNewIssues_AEE1DFCFABF172EB5EFF8B54CB6DD9D9_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesNewIssues_AEE1DFCFABF172EB5EFF8B54CB6DD9D9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reclassification of net parent equity to common stock and additional paid-in capital in conjunction with the Spin-off (in shares)</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesNewIssues_AEE1DFCFABF172EB5EFF8B54CB6DD9D9_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesNewIssues_AEE1DFCFABF172EB5EFF8B54CB6DD9D9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Issued During Period, Shares, New Issues</link:label>
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    <link:label id="lab_us-gaap_StockholdersEquityNoteSpinoffTransaction_A5BB4972BA11737BD7448B54CB6D5782_terseLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquityNoteSpinoffTransaction_A5BB4972BA11737BD7448B54CB6D5782" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reclassification of net parent equity to common stock and additional paid-in capital in conjunction with the Spin-off</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_46903B1DEE0F685AE3CF8B54CB6DB3E3" xlink:type="locator" />
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