Mechanical Engineer

At Amentum, 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 and diverse 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. We also give back to our communities through our Collectively program which incorporates matched-funding, paid volunteering time and charitable donations.

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.

About IA&R (Independent Assurance and Regulation)

IA&R has been providing risk based, proportionate, independent oversight and assurance to the civil and defence nuclear industry for over 60 years. This role provides a diverse and exciting range of opportunities to support the UK submarine programme in relation to structures, systems and components associated to emergent issues in-service, during manufacturing, plant-life extension and through next generation concept design, to ensure the Continuous At-Sea Deterrent (CASD).

This role can be based in either Bristol or Warrington with travel to customer sites required bi-monthly.

Technical Capability – Mechanical

The Mechanical Engineering team operates within the developing Mechanical Engineering Centre of Excellence (CoE). The mechanical engineer is responsible for delivering high-quality expertise across IA&R projects, contracts, and operations. The role involves conducting independent assessment/peer review of safety case related documentation to ensure that systems, technologies, and processes are safe, effective, compliant, and future-ready.

Key Accountabilities:

Engineering Delivery Across IA&R

Provide mechanical engineering support to projects, contracts, and operational teams across IA&R.

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Support delivery teams with technical advice, problem-solving, and assurance including:

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Providing formal independent nuclear safety and technical assessment/peer review of documents relating to nuclear propulsion plant systems and components, and delivering written assessment output, which may be presented to relevant safety and technical committees.

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Performing assurance activities (inspection, advice and assessment) for all types of mechanical systems and components that provide nuclear safety functions in reactor primary and secondary systems, and also dockside facilities.

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Standards Application & Technical Assurance

Collaboration & Stakeholder Engagement

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Work collaboratively with other engineering disciplines, quality, safety, and delivery teams.

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Communicate engineering requirements, constraints, and solutions clearly to stakeholders.

Capability Development & Knowledge Sharing

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Contribute to knowledge sharing, technical forums, and best practice development.

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Support mentoring and development of graduate and early-career engineers where appropriate.

Here’s What You’ll Need

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Technical competence and experience in mechanical engineering. Demonstrated through Engineering or Scientific Degree.

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Knowledge and understanding of the ageing/failure mechanisms of high integrity pumps, valves and other reactor system components.

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Experience of relevant mechanical design and safety standards.

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Experience within a highly regulated industry such as nuclear or aerospace.

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Strong awareness of engineering risk, safety, and quality requirements. An ability to critically assess complex technical and safety arguments, based upon knowledge and understanding and communicate the findings effectively.

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Ability to work effectively across a matrix organisation.

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Ability to clearly communicate with customers and stakeholders both verbally and in written form.

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Commitment to professional development and contribution to CoE development.

Knowledge of the below would be advantageous but not essential:

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Experience of conducting checking or IPR of others’ work

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Knowledge of Pressurised Water Reactor systems for naval propulsion or civil power generation applications

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Experience relating to high integrity mechanical handling equipment in naval or civil nuclear, or other safety critical applications

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Understanding of nuclear safety case requirements, including knowledge of the Office for Nuclear Regulation’s (ONR) Safety Assessment Principles (SAPs) and Technical Assessment Guides (TAGs)

Our Culture:

Our values stand on a foundation of safety, integrity, inclusion and diversity. We put people at the heart of our business, and we genuinely believe that we all succeed by supporting one another through our culture of caring. We value positive mental health and a sense of belonging for all employees.

We aim to embed inclusion and diversity in everything we do. We know that if we are inclusive, we’re more connected, and if we are diverse, we’re more creative. We accept people for who they are, regardless of age, disability, gender identity, gender expression, marital status, mental health, race, faith or belief, sexual orientation, socioeconomic background, and whether you’re pregnant or on family leave. This is reflected in our wide range of Global Employee Networks centered on inclusion and diversity.

We partner with VERCIDA to help us attract and retain diverse talent. For greater online accessibility, please visit vercida 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