Safety Case Engineers

About the opportunity

The Defence Industry Solutions Sector is a growing sector and to meet this we are looking to recruit for Safety Case Engineers with extensive experience in the development of safety justification for nuclear infrastructure to join our Defence & Security business. Candidates with similar safety case experience within high hazard industries and, or significant nuclear defence industry experience will be considered, where this compliments the existing team.

This role will ideally be based close to our Theale or Bristol office in a hybrid working role, and there will be a need for periodic visits to client sites as projects require. The Defence & Security business provides an exciting mixture of consultancy, design and engineering support, along with delivery of challenging Defence projects, to major clients in the UK at a variety of sites across the nuclear and defence industries, including HMNB Clyde, HMNB Devonport, BAES Barrow and AWE Aldermaston.

Overseas, we are delivering similarly interesting and exciting projects across the globe including projects for clients in the Middle East and Australia.

• Ensuring technical quality and excellence of your work
• Regular communication with clients and other design team members and participation in Design Reviews, HAZOPs, HAZCONs, SHERAs and stakeholder meetings
• Contributing to the development of designs for complex facilities, systems and equipment
• Adherence and contribution to business and quality management systems
• Operational and design safety, and developing good safety culture

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.

At Amentum, we're not just solving problems; we're engineering the future. Our team is driven by an unyielding commitment to innovation, integrity, and collaboration, tackling some of the most significant challenges in science, security, and sustainability. If you're passionate about making a real impact and want to be part of a community that values ethical excellence, this is the place where your ambition can thrive.

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.

People are our greatest asset, and we offer a competitive package to retain and attract the best talent. In addition to the benefits you’d expect, UK employees also receive free single medical cover and digital GP service, family‑friendly benefits such as enhanced parental leave pay, and free membership of employee assistance and parental programmes, plus reimbursement towards relevant professional development and memberships.

Work‑life balance and flexibility is a key focus area for us. We’re happy to discuss hybrid, part‑time and flexible working hours, patterns and locations to suit you and our business.

• Taking a lead role in the development of the appropriate and proportionate safety justification documentation case which will predominantly be including Nuclear but may also include Product, Construction, Process and HSE
• Ensuring technical quality and excellence of your work
• Regular communication with clients and other design team members and participation in Design Reviews, HAZOPs, HAZCONs, SHERAs and stakeholder meetings
• Contributing to the development of safety requirements within the designs for complex facilities, systems and equipment
• Adherence and contribution to business and quality management systems
• Operational and design safety, and developing a good safety culture
• Self‑starter, ability…