Assistant General Counsel, M&A and Governance (Reston)

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, a global engineering, project management and solution integrations company, seeks a top‑flight Assistant General Counsel, M&A and Governance for its Reston, VA headquarters. The Assistant General Counsel will provide hands‑on advice in executing strategic transactions while supporting the Board of Directors and advancing best‑in‑class governance practices. This role combines hands‑on M&A execution with significant exposure to Board processes. This position reports directly to the Senior Vice President and Deputy General Counsel – Securities & Governance. This is a HYBRID role with expectations that the selected candidate will work on‑site 2 days a week in our Reston, VA office.

Duties and Responsibilities:

The candidate will have strong experience in mergers and acquisitions and work closely with the Strategy and Corporate Development group and business units throughout the acquisition and post‑closing integration process. Active management of outside counsel as appropriate.

The candidate will work on a broad range of general corporate and corporate secretarial matters. Assist with the preparation of Board and Committee materials, including agendas, resolutions, minutes, and presentations. Assist with various securities filings, such as Form 10‑K, proxy statement and others, pursuant to the Securities Act of 1933, Securities Exchange Act of 1934 and the NYSE listing standards. He or she will also advise on various corporate governance matters (including Sarbanes‑Oxley Act), develop and maintain sound corporate governance policies and implement legal controls and policies to ensure good corporate governance practices.

The candidate will prepare proposals and a wide variety of documents for consideration by the board of directors and board committees and provide general support to the board on a broad range of corporate and secretarial matters.

The candidate will also support Corporate Finance and Treasury functions by providing due diligence and transactional support on debt financing arrangements, equity transactions and share repurchases.

Knowledge and Skills:

• Significant transactional experience, including mergers and acquisitions, divestitures, joint ventures and strategic alliances
• Manage due diligence processes, including coordination with internal stakeholders and external advisors
• Draft, review and negotiate transaction documents (e.g., NDAs, LOIs, purchase agreements, JV agreements)
• Oversee post‑closing integration legal matters and ongoing contractual obligations
• Support the preparation of Board and committee materials
• Coordinate with executive leadership on meeting materials and logistics
• Assist in drafting shareholder communications, including notices, proxy statements, and annual meeting materials
• Collaborate with cross‑functional teams, including finance, compliance, and operations, to address governance and due diligence‑related matters
• Oversee the upkeep of corporate records, including organizational charts, subsidiary details, and government filings, ensuring compliance with local and global entity management regulations
• Translate complex legal issues into clear, practical advice for senior business stakeholders
• Help develop and implement new transaction structures and solutions
• Familiarity with government contracting environment a plus
• Applicants must be able to work productively in a fast‑paced, highly dynamic environment with minimal supervision
• Superb research, written and verbal communication skills

Minimum Qualifications:

• Typically 8+ years relevant experience with a JD
• Experience with a reputable national or international law firm preferred
• US Citizenship required

Compensation Details:

205 - 270K

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.

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 (