Senior Nuclear Physics Consultant

Senior Nuclear Physics Consultant

£70,000 to £85,000 per annum depending on experience

Bristol, Gloucester, Plymouth or Leatherhead

We operate a flexible hybrid working pattern at Frazer‑Nash, with time split between the office, client sites and working from home.

25th October

From gigawatt‑scale reactors to next‑generation systems, the UK’s nuclear future depends on engineers who thrive on solving complex physical problems and delivering deep technical insight backed by robust analysis.

We are seeking an experienced Senior Nuclear Physics Consultant to help shape critical decisions, support safety cases, and strengthen the next generation of nuclear capability.

• Tackle safety‑critical engineering challenges
• Support confident regulatory and design decisions
• Strengthen the UK’s civil nuclear capability
• Deliver high‑quality, trusted consultancy advice to our clients

Frazer‑Nash has over three decades of experience supporting the UK nuclear sector. Our multidisciplinary teams work across civil nuclear operations, new‑build programmes and decommissioning, helping our clients meet exacting technical and regulatory requirements.

Our physicists work closely with safety and systems teams, providing insight into complex plant behaviour and supporting clients through design, justification, and regulatory engagement. We empower our consultants to take ownership of their work, build deep technical expertise, and have visible impact.

• Work on nationally significant nuclear programmes with real societal impact
• Take ownership of technically challenging work and client delivery
• Develop your career in a supportive, technically ambitious consultancy
• Be part of a collaborative team shaping the future of nuclear engineering in the UK

As a Senior Nuclear Physics Consultant, you will apply advanced analytical techniques and modelling tools to understand and explain complex physical behaviour in nuclear systems. You will contribute across the full consultancy lifecycle, from technical analysis and interpretation through to client engagement and business development.

You will manage technical work packages, mentor others, engage directly with clients, and support project delivery, while leading the capability growth in your area.

Our consultants typically work on multiple projects at once, ranging from short, focused studies to long‑term programme support across the nuclear lifecycle.

You will lead specialist capability development within your niche area, be involved in client discussions, campaigning and winning work.

• Developing and maintaining models of nuclear plant cores and systems using industry‑standard codes.
• Analysing fault sequences, transients, and system behaviours to inform design decisions and nuclear safety cases.
• Providing authoritative interpretation of model results and underlying physical phenomena.
• Supporting model verification, validation, and best‑practice application.
• Leading a specialist capability area within the company.
• Communicating complex technical outputs clearly and concisely to clients, regulators, and internal stakeholders.

• Strong understanding of nuclear physics, and an area of expertise in reactor physics, neutron kinetics, criticality or shielding.
• A degree in Engineering, Physics, Applied Mathematics, or a related discipline, or equivalent relevant experience.
• Demonstrable experience in supporting reactor core design and/or operations, using relevant lattice physics, neutron kinetics, or neutron transport codes.
• Experience of transient…