Senior Reactor System Design Engineer

Lead the delivery of system design packages so that outputs are technically robust, aligned to programme requirements and delivered to agreed timescales.

Develop and manage system requirements to ensure designs are clearly defined, traceable and supported by appropriate verification and evidence.

Produce high-quality engineering documentation, including design reports, system definitions and substantiation artefacts that support safety cases and regulatory submissions.

Collaborate closely with internal teams and external stakeholders, including regulators, to resolve technical challenges and maintain programme momentum.

Identify and actively manage risks and opportunities within the design scope, ensuring effective mitigation and continuous improvement.

Apply design governance, configuration control and assurance processes to maintain consistency, quality and compliance.

Provide technical leadership and guidance to engineers, supporting capability growth and driving a high-performance team environment.

Proven experience delivering complex system design work within nuclear or another highly regulated or safety-critical industry.

A degree in an engineering or relevant technical discipline, or equivalent experience gained through industry delivery.

Strong understanding of systems engineering principles, including requirements management, integration and structured design approaches.

Practical experience in mechanical or process system design, such as fluid systems, HVAC, chemical or plant-based systems.

Confidence in producing and reviewing detailed technical documentation such as P&IDs, calculations and design substantiation reports.

Strong communication skills with the ability to engage and build credibility across multidisciplinary teams and stakeholders.

A collaborative and proactive approach, with the ability to lead technical work, solve problems and support the development of others.

We anticipate paying a salary of between £50,6500 - £66,500.00 DOE plus:-

Bonus - Performance related target opportunity 12.5%

Benefits Allowance – £2,200 per annum, enabling you to create a bespoke package

Pension - 12% employer and 6% employee contributions.

Holidays - 28 days holiday (+ public holidays) and the ability to buy or sell up to 4 days.

Private Medical Insurance - BUPA single cover health care

Life Assurance - 6x pensionable pay

£250 - One-off payment for new starters for home office purchases

You’ll be joining a rapidly growing organisation at a critical stage of its development, offering excellent opportunities for learning, professional development, and long-term career progression within a purpose-driven and innovative environment.

We are an equal opportunities employer and welcome applications from all backgrounds. Inclusivity is central to our culture, and we are committed to creating a workplace where everyone feels valued, respected, and supported.

We are happy to discuss flexible working arrangements and will make reasonable workplace adjustments where required to support individuals in performing at their best.

Confidence can sometimes hold us back from applying, but there’s no such thing as a ‘perfect’ candidate. If you feel you meet around 75% of the requirements, we would love to hear from you.

We also welcome applications from individuals considering a sector move, particularly those with transferable experience from other regulated or safety-critical industries.

You’ll be joining a forward-thinking organisation that values transparency, fairness, and innovation. We offer:

• A flexible, inclusive, and supportive working environment. • Opportunities for career growth in a rapidly scaling business. • A culture that values diversity, innovation, and continuous learning.

We are an equal opportunities employer and welcome applications from all backgrounds. Inclusivity is important to us, and as a Disability Confident organisation, we are committed to fair, supportive, and continually improving recruitment practices that ensure everyone has the opportunity to thrive.

Confidence can sometimes hold us back from applying for a job. But we'll let you in on a secret: there's no such thing as a 'perfect' candidate. If you feel you meet 75% of the requirements for this role, we would love to hear from you.

Also, if you are considering a career move or a sector-jump, please get in touch – we welcome applications from people with transferable skills.