Buyer III

Amentum is a global leader in advanced engineering and innovative technology solutions, trusted by the United States and its allies to address their most significant and complex challenges in science, security and sustainability. Our people apply undaunted curiosity, relentless ambition and boundless imagination to challenge convention and drive progress. Our commitments are underpinned by the belief that safety, collaboration and well-being are integral to success.Headquartered in Chantilly, Virginia, we have approximately 50,000 employees in more than 70 countries across all 7 continents.

Amentum is seeking a talented Buyer III to support the Intelligence and Cyber business group. We are building a GSC Team to support specific programs. This is a HYBRID role, when required to be on-site you will report to our Chantilly/Reston, VA or Aikin, South Carolina Amentum office. You are permitted to work remote-telework when you are not needed on-site. You must be a US Citizen to apply.

This role will be responsible for all phases of cradle-to-grave procurement, including acquisition planning, source selection, cost/price analysis, negotiation, post-award administration and closeout. Accountable for ensuring compliance with government policies and procedures. Expected to possess a solid understanding of government procurement, work independently while supporting a one-team approach, be solution-oriented, contribute meaningfully to team and/or organizational goals, demonstrate excellent judgement and business acumen, collaborate with stakeholders and other departments, identify risks and mitigation strategies, and potentially support special projects.

Essential Responsibilities:

• Establishes source of supply, negotiates price, delivery date, and other necessary commitments based upon authorized requisition and complies with company policies and federal regulations.
• Provides information to requester that includes communication of procurement actions or status and assist with special requirements.
• Adheres to Supply Chain Procurement procedures to assure follow-up and administration of purchase order files.
• Reviews and processes purchase requisitions.
• Assists in the preparation of procurement centered reports.
• Contacts suppliers, secures bids and executes purchase orders in accordance with Amentum procedures.
• Evaluates proposals and quotations, determine offer responsiveness, responsibility, and eligibility for award, and perform discussions and negotiations.
• Provides pricing in support of Business Development efforts, as required.
• Maintains procurement records in accordance with Contractor Purchasing System Review (CPSR) guidelines/controls.
• Ensures compliance with FAR/DFARS, Agency-specific regulations and Amentum policies and procedures for subcontracts and procurement.
• Conducts purchase order file reviews in support of Government audits.
• Negotiates and settles with suppliers regarding damage claims, rejections, losses, return of materials, over shipments and cancellations.
• Interfaces and coordinates with subcontractors and service providers, as well as Amentum HR, Finance, AP, and Program teams. Participation in cross-functional collaboration and tiger teams.
• Supports small business goals on assigned subcontracts, coordinate with technical staff, maintain records, and participate in small business outreach activities.
• Performs Purchase Order Closeout.
• Perform all other position-related duties as assigned or requested.

Minimum Knowledge, Skills, and Abilities:

• Bachelor's degree in business administration or related field, and five (5) years of experience in procurement, subcontracts, supply chain or related field; or a Master's degree and three (3) years of related experience.

• Perform all other position-related duties as assigned or requested.

• Excellent communication and negotiation skills and working knowledge of SharePoint, Microsoft Office Suite, and integrated software applications are required.
• Experience with various subcontract types (Cost-Plus, Fixed Price, Time & Materials, and subsets thereof)
• This is a HYBRID role, when required to be on-site you will report to our Chantilly/Reston, VA or Aikin, South Carolina Amentum office. You are permitted to work remote-telework when you are not needed on-site.
• US Citizenship is required to apply.

Preferred Knowledge, Skills, and Abilities for all positions:

• Experience with Costpoint or similar ERP system, to include use of the purchasing module.
• Process improvement experience in a recognized methodology (Agile, Lean Six Sigma, CMMI, ISO).
• Experience with AMRO, IBM Maximo, Hyland OnBase, Unanet, IBM Cognos, Deltek Time and Expense, and OnPoint systems.
• Capture and Proposal support experience.
• Experience negotiating agreements with commercial companies, non-profits and universities.
• An active Top Secret Clearance is preferred. Candidates without a clearance will be considered, but the candidate must have ability to obtain/maintain a US government security clearance.

Work Environment, Physical Demands, and Mental Demands:

• Typical office environment with no unusual hazards, occasional lifting to 20 pounds, constant sitting while using the computer terminal, constant use of sight abilities while reviewing documents, constant use of speech/hearing abilities for communication, and constant mental alertness; must possess planning/organizing skills and be able to work under deadlines.
• May be required to travel domestically and internationally on short notice, which may include travel to austere environments under harsh living conditions.

Compensation Details:
$80-k - $85K

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:
02/26/2026 - Until Filled
Amentum 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.