Title:
Senior Nuclear Thermal Hydraulics Consultant
Title: Senior Nuclear Thermal Hydraulics Consultant
Salary range: £71,000 to £82,000 per annum depending on experience
Location: Bristol or Manchester
Working Pattern: We operate a flexible hybrid working pattern at Frazer-Nash, with time split between the office and working from home.
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 thermal hydraulics specialists work closely with safety, systems, and reactor 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.
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 Senior Nuclear Thermal Hydraulics Consultant, you will apply advanced analytical techniques and modelling tools to understand and explain complex thermal‑hydraulic behaviour 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 typically 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 thermal‑hydraulics capability across existing and emerging nuclear programmes.
Key responsibilities include:
Developing and maintaining thermal‑hydraulic models of nuclear plant 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,
Communicating complex technical outputs clearly and concisely to clients, regulators, and internal stakeholders.
What we are looking for:
Technical experience:
Strong understanding of fluid flow, heat transfer, thermal hydraulics, and multiphase flows,
A degree in Engineering, Physics, Applied Mathematics, or a related discipline, or equivalent relevant experience,
Demonstrable experience in nuclear thermal hydraulics supporting nuclear plant design and/or operations (perhaps using codes like RELAP, GOTHIC, CATHARE, TRACE, VIPRE, S5K)
Experience of transient and fault analysis within nuclear safety contexts,
Ability to interpret, validate, and clearly explain complex modelling outputs.
Personal and consultancy skills:
Ability to independently manage and deliver work to meet client requirements
Experience contributing to proposal writing, client liaison, and business development
Strong communication skills, with the ability to engage effectively through meetings, presentations, written reports, commercial bids, and technical discussions
Due to the nature of the work that Frazer‑Nash Consultancy undertakes, candidates will be required to undergo pre‑employment screening and must be able to satisfy clearance criteria for UK National Security Vetting.
BENEFITS
We provide our people with an excellent benefit and offering package that comprises:
Competitive salary with yearly reviews
25 days holiday + the opportunity to buy 5 days.
A company that has its heart in the right place and a welcoming work culture.
Happy to talk flexible working
Enhanced parental benefits
Company pension scheme
Targeted professional development
Life assurance
Private healthcare membership
Bonus scheme linked into company performance
Paid membership fees to a professional institution
Support in attaining professional membership
Cycle to work scheme
Season rail ticket loan
And further optional benefits you can tailor to your personal requirements
With offices in the UK and Australia, Frazer-Nash is a leading systems, engineering and technology company. Our work makes a difference to things that matter in the world.
Our c.1500 employees work from a network of fourteen UK and four Australian locations. They apply their expertise to develop, enhance and protect our clients' critical assets, systems and processes.
We contribute to national security in a huge number of ways, helping to ensure that power is generated and distributed to everyone who needs it. We support moving people and goods around and between the big cities of an increasingly urbanised society. We work to make the world a more sustainable place. We ensure governments save time and money when public spending globally is under huge pressure. And we help our clients wrestle with the challenges and opportunities of an ever-accelerating digital revolution.
A career with Frazer-Nash - we have opportunities in Australia and throughout the UK.
We recruit from a diverse range of backgrounds. ‘Innovators’, ‘problem solvers’, ‘thinkers’ and ‘doers’ are just some of the words that are used to describe our employees. So, whether you’re a graduate, an experienced professional or wish to be included on our Associates Register, there may be a place for you at Frazer-Nash. We also welcome applications from ex-military specialists, as we know military skills, experience, and knowledge can translate seamlessly into our commercial environment.
Our Australian business is going from strength to strength - so we're particularly keen to hear from you if you're looking for your next move in Adelaide, Melbourne or Canberra. You can find out more by visiting our Australian careers site, fncaustralia.com.au. And if you're in the UK, you can explore our current opportunities on our website at the link below.
Registered address: Springfield Drive, Leatherhead, Surrey KT22 7NL
