Principal Engineer – Nuclear Substantiation (Site) in Millom

Location: Barrow-in-Furness. We offer a range of hybrid and flexible working arrangements – please speak to your recruiter about the options for this particular role.

Salary: £60,000 + depending on experience

What you’ll be doing:

• Authoring and managing nuclear site assets’ design substantiation documentation supporting the site nuclear safety case
• Reviewing analyses, assessments, and calculations supporting nuclear design substantiation
• Supporting periodic review of safety
• Taking ownership of deliverables, and demonstrating high levels of autonomy and leadership
• Supporting the implementation of design substantiation requirements
• Working closely with a broad range of stakeholders including Site Safety Case, Human Factors, and Engineering Authority Teams
• Support in the development of other Nuclear Substantiation team members
• Collaborating with the wider business on site assets nuclear design substantiation related activities

Your skills and experiences:

Essential:

• Experience of the nuclear industry and nuclear safety regulations
• Degree qualified in a STEM subject or equivalent working experience.
• Ability to produce high quality technical reports
• Determined in driving all deliverable and associated activities through due process to completion
• Excellent stakeholder management

Desirable:

• Broad understanding of multiple engineering disciplines
• Chartered Engineer from the Engineering Council and a member of a relevant professional body
• Nuclear design substantiation analysis and assessment exposure/experience

Benefits:

As well as a competitive pension scheme, BAE Systems also offers employee share plans, an extensive range of flexible discounted health, wellbeing and lifestyle benefits, including a green car scheme, private health plans and shopping discounts – you may also be eligible for an annual incentive.

The Site Engineering – Nuclear Substantiation team:

You will be joining a key team with some great development opportunities both in the technical and managerial streams. Native to the team, there are opportunities to get involved in the design substantiation and safety justification of a variety of site assets and facilities spanning mechanical, civil and structural, and electrical, in addition to getting involved in finite element analysis and simulation using the latest cutting-edge tools and techniques. This also involves regular interaction and joint working with the Engineering Authority, Site Specialist Engineers, Site Safety Case, Human Factors, as well as Boat Services and Boat Build functions delivering an exceptionally varied and diverse scope. This interaction offers plenty of development opportunities both in terms of formal secondments and informal extended collaboration to suit you and your career aspirations.

This could be an exciting and fulfilling opportunity waiting for you at the Nuclear Substantiation and Analysis team – SEA (DDC) at BAE Systems. Apply today to see how far you can go. We offer relocation support packages across all Submarine roles, subject to meeting eligibility criteria.

Why BAE Systems?

This is a place where you’ll be able to make a real difference. You’ll be part of an inclusive culture that values diversity of thought, rewards integrity, and merit, and where you’ll be empowered to fulfil your potential. We welcome people from all backgrounds and want to make sure that our recruitment processes are as inclusive as possible. If you have a disability or health condition (for example dyslexia, autism, an anxiety disorder etc.) that may affect your performance in certain assessment types, please speak to your recruiter about potential reasonable adjustments.

Please be aware that many roles at BAE Systems are subject to both security and export control restrictions. These restrictions mean that factors such as your nationality, any nationalities you may have previously held, and your place of birth can restrict the roles you are eligible to perform within the organisation. All applicants must as a minimum achieve Baseline Personnel Security Standard. Many roles also require higher levels of National Security Vetting where applicants must typically have 5 to 10 years of continuous residency in the UK depending on the vetting level required for the role, to allow for meaningful security vetting checks.

Closing Date: 5th January 2026. We reserve the right to close this vacancy early if we receive sufficient applications for the role. Therefore, if you are interested, please submit your application as early as possible.