Principal Engineer – Nuclear Substantiation (Site)

Location: Barrow-in-Furness. We offer a variety of hybrid and flexible working arrangements—talk to your recruiter about the options available for this role.

Salary: Starting at £60,000, depending on experience.

As a Principal Engineer, you will play a vital role in ensuring the safety and integrity of our nuclear site assets. Your responsibilities will include:

• Authoring and managing design substantiation documentation that supports the site nuclear safety case.
• Reviewing analyses, assessments, and calculations related to nuclear design substantiation.
• Supporting periodic safety reviews.
• Taking ownership of deliverables, showcasing your autonomy and leadership.
• Implementing design substantiation requirements effectively.
• Collaborating with a diverse range of stakeholders, including Site Safety Case, Human Factors, and Engineering Authority Teams.
• Mentoring and developing other members of the Nuclear Substantiation team.
• Engaging with the wider business on nuclear design substantiation activities.

Essential:

• Experience in the nuclear industry and familiarity with nuclear safety regulations.
• A degree in a STEM subject or equivalent working experience.
• Proven ability to produce high-quality technical reports.
• A determined approach to driving deliverables through to completion.
• Excellent stakeholder management skills.

Desirable:

• A broad understanding of multiple engineering disciplines.
• Chartered Engineer status from the Engineering Council and membership in a relevant professional body.
• Experience in nuclear design substantiation analysis and assessment.

We offer a competitive pension scheme along with a range of employee share plans. Enjoy an extensive selection of flexible health, wellbeing, and lifestyle benefits, including:

• A green car scheme
• Private health plans
• Shopping discounts

You may also be eligible for an annual incentive!

Join a dynamic team with fantastic development opportunities in both technical and managerial streams. You’ll be involved in:

• Design substantiation and safety justification of various site assets and facilities.
• Finite element analysis and simulation using cutting-edge tools and techniques.
• Regular collaboration with Engineering Authority, Site Specialist Engineers, and other key functions.

This role offers a diverse scope and numerous opportunities for formal secondments and informal collaborations tailored to your career aspirations.

At BAE Systems, you’ll make a real difference in an inclusive culture that values diversity of thought and rewards integrity. We empower you to fulfill your potential and welcome individuals from all backgrounds. If you have a disability or health condition that may affect your performance, please discuss potential reasonable adjustments with your recruiter.

Important Information: Many roles at BAE Systems are subject to security and export control restrictions. Factors such as nationality and residency may affect your eligibility for certain positions. All applicants must meet the Baseline Personnel Security Standard, with many roles requiring higher levels of National Security Vetting.

Closing Date: 18th February 2026. We reserve the right to close this vacancy early if we receive sufficient applications, so apply as soon as possible!

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