Defence jobs in United States

Amentum Portsmouth, England, United Kingdom

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Our company provides design and engineering services for our nuclear and defence clients across the UK and abroad. Our team is experiencing exciting growth and long-term prospects within our established practice. Location: South England (Portsmouth focus). We offer hybrid working with 1-2 days in the office. Occasional site visits may be necessary.

Are you a seasoned civil or structural engineer ready to take on high-impact defence projects? Join Amentum’s growing Ports and Maritime team and help deliver strategic infrastructure solutions for the UK Ministry of Defence. This is your opportunity to lead, innovate, and make a real difference in national security and sustainability.

At Amentum, we don’t just solve problems—we engineer the future. We’re a global leader in defence, nuclear, and security services, driven by integrity, innovation, and collaboration. You’ll be part of a team that values ethical excellence, supports your growth, and empowers you to deliver your best work.

• Working with the seasoned Ports and Maritime Engineers and Technicians.
• Deliver high-quality engineering solutions across the full project lifecycle.
• Build strong client relationships and support the business.
• Produce technical designs, calculations, and reports to British Standards and Eurocodes.
• Work with junior engineers and contribute to continuous improvement.
• Ensure compliance with health and safety legislation and quality systems.

Here, we believe that success comes from continuously pushing boundaries and working together to deliver on our promises. We embrace challenges with confidence and are dedicated to creating a secure and vibrant future for all.

We’ll inspire and empower you to deliver your best work so you can evolve, grow and succeed – today and into tomorrow. We offer an exciting range of opportunities to develop your career within a supportive team who always strive to do the right thing for our people, clients and communities.

• Civil or Structural Engineer with a strong MEng background. Working towards Chartership.
• Broad experience in civil engineering design and construction.
• Proven heavy Civils experience.
• Strong technical expertise in structural and maritime design or similar industry experience.
• Experience working in multidisciplinary teams and managing budgets.
• You must be a UK National and have the ability to obtain SC level security clearance, which includes being resident in the UK for the preceding 5 years.

• Familiarity with PIANC guidance and seismic design.
• Experience with BIM, STAAD.Pro, SAP2000, LUSAS, WALLAP, PLAXIS 2D.
• Background in nuclear industry and safety case documentation.

• Competitive salary and benefits package, with unrivalled salary sacrifice schemes available.
• Free single medical cover and digital GP service.
• Generous pension contributions.
• Enhanced parental leave and family‑friendly policies.
• Professional development support and membership reimbursement.
• Access to a flexible benefits programme tailored to your needs, including buying/selling up to 10 days extra holidays.
• Hybrid and flexible working options to support work‑life balance.

If you're passionate about engineering excellence and want to be part of a team that’s shaping the future of defence infrastructure, we’d love to hear from you.

Our values are built on a strong foundation of safety, integrity, and respect for every individual. People are at the heart of our mission, and we believe in supporting one another through a culture of care and collaboration.

We strive to create a workplace where everyone feels they belong and can thrive. Supporting mental wellbeing and fostering a sense of connection are essential to how we work.

When we embrace different perspectives and work together, we become more innovative, more agile, and more successful.

We partner with VERCIDA; for greater online accessibility please visit www.vercida.com to view and access our roles. As a Disability Confident employer, we will interview all disabled applicants who meet the minimum criteria for a vacancy. We welcome applications from candidates who are seeking flexible working and from those who may not meet all the listed requirements for a role.

If you require further support or reasonable adjustments with regards to the recruitment process (for example, you require the application form in a different format), please contact the team.

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, 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.

Mid‑Senior level

Full‑time

Engineering and Information Technology

Defense and Space Manufacturing