Please note position is contingent upon award Amentum is a leading provider of engineering scientific and program management support services to some of the top agencies in the U.S. government including the Defense Advanced Research Projects Agency DARPA National Aeronautics and Space Administration NASA the Department of Homeland Security DHS and the intelligence community.The mission of DARPAs Tactical Technology Office TTO is to reimagine every aspect of military hardware design development test manufacture and sustainment - with a focus on rapid affordable and scalable deployment - to create and prevent technological surprise. TTOs goal is to demonstrate compelling hardware at the smallest scale that traces to disruptive capability with designs that reduce risk and cost by managing complexity and can be manufactured responsively and affordably. Additional information on TTO is available here httpswww.darpa.milaboutofficesttoAmentum is seeking a meticulous and experienced Subcontract Administration Specialist to support the Tactical Technology Office TTO at the Defense Advanced Research Projects Agency DARPA. In this role you will be the liaison between our Operations team and Global Supply Chain Management responsible for subcontractor onboarding funding modifications invoice reconciliation financial tracking and vendor coordination as part of Amentums TTO contract management team. This is a full-time position in Arlington VA Ballston areaJob Duties and ResponsibilitiesWork closely with the Contract management team Accounts Payable GSCM and cross-functional offices to ensure smooth execution of subcontracts.Identify opportunities to improve subcontract administration processes particularly around invoice reconciliation payment processing and vendor tracking.Proactively recommend solutions to streamline workflows and strengthen collaboration with Accounts Payable and GSCM teams.Leverage advanced expertise in financial systems such as Costpoint Unanet and OnBase to process requisitions and maintain funding approval and allocation pipelines.Organize subcontract-related records and data repositories on platforms like SharePoint filer1 and Microsoft Teams ensuring easily accessible and up-to-date documentation for audits and leadership review.Generate regular status reports summarizing subcontractor performance invoicing status funds execution and pending actions.Track and manage subcontract deliverables milestones and performance. Monitor adherence to contract terms financial thresholds and reporting requirements.Reconcile subcontractor invoices with funding and deliverable requirements ensuring billing accuracy and alignment with contract performance.Coordinate with subcontractors to review and resolve invoice discrepancies and other transactional issues.Prepare and submit reconciliations across multiple financial systems including Costpoint Unanet and OnBase while ensuring completeness and audit readiness.Collaborate with DARPAs Accounts Payable AP and Global Supply Chain Management GSCM teams to facilitate prompt resolution of vendor-related issues.Required QualificationsBachelors degree in Business Finance or related fieldAt least 10 years of experience in subcontract or financial managementDemonstrated expertise in subcontractor invoice reconciliation and vendor management.Hands-on experience using Costpoint Unanet and OnBase for financial reporting reconciliation and subcontract tracking.Demonstrated professionalism maturity sound judgement and excellent communication and interpersonal skills necessary for daily interactions with executive-level audiences in a dynamic high-visibility environmentCreativity foresight and mature judgment in anticipating and solving financial administrative and program management-related problems and issuesAbility to work independently or in a team setting as circumstances dictateMust be able to obtain and maintain a secret US Government Clearance. Note US Citizenship is required to obtain a Secret Clearance.Preferred QualificationsExpertise in working with Global Supply Chain Management and Accounts Payable teams in a Government services environment.Experience managing subcontracts in a fast-paced R&D environment with sensitive projects and high-profile deliverables.Prior experience supporting DARPAActive Secret security clearance with the ability to obtain a Top Secret clearance. Please note that US citizenship is required to obtain and maintain a security clearanceAbility to work on-site full-time in Arlington VACompensation and BenefitsHIRING SALARY RANGE 120k-160k salary to be determined by the education experience knowledge skills and abilities of applicant internal equity and alignment with market data. Compensation Details120k-160k The compensation range or hourly rate listed for this position is provided as a good-faith estimate of what the company intends to offer for this role at the time this posting was issued. Actual compensation may vary based on factors such as job responsibilities education experience skills internal equity market data applicable collective bargaining agreements and relevant laws.Benefits OverviewOur health and welfare benefits are designed to support you and your priorities. Offerings includeHealth dental and vision insurancePaid time off and holidaysRetirement benefits including 401k matchingEducational reimbursementParental leaveEmployee stock purchase planTax-saving optionsDisability and life insurancePet insuranceNote Benefits may vary based on employment type location and applicable agreements. Positions governed by a Collective Bargaining Agreement CBA the McNamara-OHara Service Contract Act SCA or other employment contracts may include different provisionsbenefits. Original Posting03062026 - Until FilledAmentum anticipates this job requisition will remain open for at least three days with a closing date no earlier than three days after the original posting. This timeline may change based on business needs. Amentum is proud to be an Equal Opportunity Employer. Our hiring practices provide equal opportunity for employment without regard to race sex sexual orientation pregnancy including pregnancy childbirth breastfeeding or medical conditions related to pregnancy childbirth or breastfeeding age ancestry United States military or veteran status color religion creed marital or domestic partner status medical condition genetic information national origin citizenship status low-income status or mental or physical disability so long as the essential functions of the job can be performed with or without reasonable accommodation or any other protected category under federal state or local law. Learn more about your rights under Federal laws and supplemental language atLabor Laws Posters.