Reactor and Systems Performance Consultant

Title Reactor and Systems Performance Consultant

Title Reactor and Systems Performance Consultant
Role: Reactor and Systems Performance Consultant
Salary range: £50,000–£65,000 per annum depending on experience
Location: Manchester, Burton, Bristol, Gloucester or Glasgow
Working Pattern: We operate a flexible hybrid working pattern at Frazer‑Nash, with time split between the office, client sites and working from home.
Closing date: 30th August. We encourage early applications, as vacancies may close once we receive sufficient applications.

The Nuclear Renaissance is Here 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.
At Frazer‑Nash, our reactor and systems performance specialists sit at the heart of our work in nuclear safety, design, and assurance across a range of clients, technologies and technical disciplines. We are seeking people with experience of reactor and systems performance modelling to help shape critical decisions, support safety cases, and strengthen the next generation of nuclear capability. Whether your expertise lies with reactor physics, thermal hydraulics, fuel performance or any related nuclear discipline, you will find a place with us as we expand our teams in support of clients from across the industry.
We are looking for people with experience in any of the following disciplines:

• Reactor physics
• Thermal hydraulics
• Fuel performance
• Fault studies
• Shielding and radiological protection
• Or any other reactor or systems performance discipline

Your Work Will Help To

• 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

About Frazer‑Nash In Nuclear 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 reactor and systems performance specialists work closely with design and safety engineers, 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.
Why Join Frazer‑Nash?

• 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

Why this Role?

As a Reactor and Systems Performance modeller, you will apply advanced analytical techniques and modelling tools to understand and explain complex behaviours in nuclear systems. You will contribute across the full consultancy lifecycle, from technical analysis and interpretation through to client engagement and business development.
Taking the lead
You will manage technical work packages, engage directly with clients, and support project delivery, while collaborating with supportive colleagues and mentoring and guiding less experienced engineers.
Variety of work
Our consultants typical work on multiple projects at once, ranging from short, focused studies to long‑term programme support across the nuclear lifecycle.
Growing capability
You will contribute to winning work, client discussions, and the continued growth of our reactor and systems performance capability across existing and emerging nuclear programmes.

Key Responsibilities Include

• Developing and maintaining models of nuclear plant systems using industry‑standard codes,
• Analysing plant performance under a wide range of operating scenarios 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,
• Communicating complex…