Manufacturing 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.

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n 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.

About the opportunity:

We are seeking a Manufacturing Engineer to work with and support a key assurance role within the Ministry of Defence’s (MoD) Nuclear Submarine Build Programme.

This role supports the Independent Nuclear Assurance (INA) team, which provides independent nuclear safety and technical advice to the MoD. Specifically, this role will be providing Independent Third-Party Witnessing, surveillance and inspection for the manufacture and testing of the Naval Reactor Plants (NRP), which is a key part of delivering the UK’s future submarine fleet, including the Continuous at Sea Deterrent (CASD).

The ideal candidate would have detailed understanding and experience of manufacturing, testing techniques and design/quality standards for high reliability pressure equipment or structural components, alongside effective communication skills to work with the INA team, MoD Customer and enterprise partners. Training and support can be provided to supplement candidates where further development in specific areas may be necessary.

The focus of this role would predominantly consist of working on the equipment suppliers’ site in Derby to monitor and witness the manufacturing work being undertaken and utilise existing experience and knowledge to provide an independent and balanced view on how it is being carried out. This will involve occasional travel to the INA office in Birchwood, MoD HQ offices in Bristol and supplier sites.

Key Responsibilities

• Conducting on-site Independent Third-Party Witnessing of NRP manufacturing processes, methods and testing.
• Provision of impartial, balanced and proportionate advice to the MoD in support of the manufacture of future NRPs.
• Representing INA at meetings with MoD and their contractors.
• Preparation of reports to articulate and brief findings.
• Conducting work according to the best applicable safety, technical and regulatory standards, consistent with relevant good practice and quality assurance.
• Complying with information security requirements.

Here’s What You’ll Need:

• A Degree, HND or Apprenticeship in Engineering, with hands-on operational experience in relevant manufacturing processes.
• Expert knowledge of one (or more) of the following manufacturing processes: Metal Casting, Bulk Deformation Processes (e.g. forging, rolling, etc), Powder Metallurgy (e.g. Hot-Isostatic Pressing & Additive Manufacturing), Heat Treatment of Metals, Welding Processes, Coating/ Deposition Processes, Metal Removal Processes (e.g. cutting, machining, chemical machining, etc), and Cleaning/ Surface Treatments.
• Experience of performing manufacturing process audits, ideally with an emphasis on ASME Boiler and Pressure Vessel Code (BPVC) compliance.
• Understanding of developing and implementing Technical Specifications.
• Understanding and experience of conducting continuous improvement activities within manufacturing (e.g. Kaizen, Six Sigma, 5S, etc),
• Knowledge of engineering materials and their associated properties (e.g. low-alloy & carbon steels, stainless steel, nickel-based alloys).
• Expertise in measurement, inspection and testing techniques,
• Effective communication skills - to be able to work directly with the customer and their contractors,
• Safety and Environmental Awareness - Understanding of safety protocols and environmental impact considerations associated with manufacturing processes,
• This role will require security clearance; therefore, applications should hold or be able to obtain security clearance in the UK

Desirable

• Experience of using Computer-Aided Design & Manufacturing (CAD/CAM),
• Chartership, or working towards, within an engineering or scientific discipline,
• Knowledge or experience of nuclear engineering and As Low As Reasonably Practicable (ALARP) principals.

Our Culture

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 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