Senior​/Principal Safety Case Engineer

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.

We are currently recruiting Senior and Principal Safety Case Engineers to join our team within our Environment Business. You will join a multi‑disciplinary business that delivers a range of projects for UK and international customers.

The Environment Business works primarily within the decommissioning and radioactive waste management fields, delivering a diverse range of consultancy and engineering projects to major clients in the UK and overseas.

The primary focus of our team is the provision of safety analysis and safety case support in the fields of waste management and decommissioning, across the full lifecycle of nuclear plants, including new and operational reactor plants, waste processing and disposal facilities and decommissioning sites. We support licensees, future licensees, waste management organisations and regulators.

You will have the opportunity to work alongside a diverse group of team members to meet our evolving customer needs. You will also be supported to develop your skills and experience, as well as being offered opportunities to build a successful career and to lead technical teams and take responsibility for project delivery.

The role may require travel to other sites to facilitate efficient and effective delivery.

We are primarily looking for safety case engineers to be based in our Warrington, London and Harwell offices, on a hybrid basis, but we would consider other locations for the right candidate.

You will provide nuclear safety case support through the full lifecycle including:

• Planning and leading hazard identification studies (e.g. HAZIDs, HAZOPs).
• Developing and implementing safety case strategies.
• Leading and delivering deterministic and/or probabilistic safety assessments.
• Preparing safety case documentation and reports.
• Providing independent advice and review of safety case documentation.

• Degree-qualified or equivalent in a scientific or engineering discipline.
• Strong nuclear industry experience, with a track record in nuclear safety case development.
• Experience coaching and mentoring junior team members.
• Proficient in Microsoft Word and Excel and experienced in working within a SharePoint environment.

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…