*** 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 DARPA’s 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. TTO’s 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: https://www.darpa.mil/about/offices/tto
Amentum 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 Amentum’s TTO contract management team. This is a full-time position in Arlington, VA (Ballston area)
Job Duties and Responsibilities:
Work 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 DARPA’s Accounts Payable (A/P) and Global Supply Chain Management (GSCM) teams to facilitate prompt resolution of vendor-related issues.
Required Qualifications:
Bachelor’s degree in Business, Finance, or related field
At least 10 years of experience in subcontract or financial management
Demonstrated 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 environment
Creativity, foresight, and mature judgment in anticipating and solving financial, administrative, and program management-related problems and issues
Ability to work independently or in a team setting as circumstances dictate
Must be able to obtain and maintain a secret US Government Clearance. Note: US Citizenship is required to obtain a Secret Clearance.
Preferred Qualifications:
Expertise 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 DARPA
Active 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 clearance
Ability to work on-site, full-time in Arlington, VA
Compensation and Benefits:
HIRING 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 Details:
$120k-$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 Overview:
Our health and welfare benefits are designed to support you and your priorities. Offerings include:
Health, dental, and vision insurance
Paid time off and holidays
Retirement benefits (including 401(k) matching)
Educational reimbursement
Parental leave
Employee stock purchase plan
Tax-saving options
Disability and life insurance
Pet insurance
Note: Benefits may vary based on employment type, location, and applicable agreements. Positions governed by a Collective Bargaining Agreement (CBA), the McNamara-O'Hara Service Contract Act (SCA), or other employment contracts may include different provisions/benefits.
Original Posting:
03/06/2026 - 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 at Labor Laws Posters.