Principal Engineer – Nuclear Substantiation (Site)

Location: Barrow-in-Furness. Enjoy the flexibility of hybrid working arrangements—talk to your recruiter about the options available for this role.

Salary: Starting at £60,000, with potential for more based on your 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 to support 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 team members in Nuclear Substantiation.
• 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 practical 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.

At BAE Systems, we offer more than just a job. Here’s what you can look forward to:

• A competitive pension scheme and employee share plans.
• An extensive range of flexible health, wellbeing, and lifestyle benefits, including a green car scheme and private health plans.
• Shopping discounts and eligibility for an annual incentive.

Join a dynamic team with fantastic development opportunities in both technical and managerial streams. You’ll be involved in the design substantiation and safety justification of various site assets, including mechanical, civil, structural, and electrical components. Engage in finite element analysis and simulation using cutting-edge tools and techniques. Collaborate with Engineering Authority, Site Specialist Engineers, and more, offering a diverse scope of work and ample growth opportunities.

Here, you’ll make a real difference in an inclusive culture that values diversity of thought and rewards integrity. We empower you to reach your full potential, welcoming individuals from all backgrounds. If you have a disability or health condition that may affect your performance, we encourage you to 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: 4th February 2026. We may close this vacancy early if we receive sufficient applications, so don’t wait—apply today!

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