Senior Nuclear Engineer (Systems Eng)


Senior Nuclear Engineer (Systems Eng)



Sector: Nuclear R&D

Category: Engineering

We are supporting our partner – MoltexFLEX- in seeking a Senior Nuclear Engineer with a strong system engineering acumen to join their growing team in their efforts to contribute and respond to the world’s critical necessity of clean energy. They have the technology to transform the energy landscape, ushering in a new age of clean, low-cost energy for all.

Position summary

The Senior Nuclear Systems Engineer will report to the Head of Engineering and work within a growing Engineering team to develop the design of the First-Of-A-Kind (FOAK) ‘FLEX reactor’, a Molten Salt Reactor (MSR) technology that MoltexFLEX are developing in the UK. The role will involve inter-disciplinary engineering in order to specify the systems associated with a fully substantiated engineering design and its associated safety case.

This is an exciting opportunity for you to join us on our design development journey and work in an agile and multi-disciplined team, which is focused on developing advanced nuclear technologies that can make a significant contribution to reducing global CO2 emissions.

What MoltexFLEX offers

MoltexFLEX offers you the opportunity to develop your nuclear engineering career within a diverse and growing team of engineering, safety case, and scientific professionals, all collectively working towards the delivery of the FLEX reactor. For those on board, it is going to be a challenging but rewarding experience.

The MoltexFLEX office is in Birchwood, Warrington, close to travel networks and various amenities.

MoltexFLEX is an equal opportunity employer. Moltex prides itself in having a team that promotes diversity, inclusion, leadership, mindfulness, high initiative, energy, and passion.


The MoltexFLEX Systems Engineer will be responsible for overseeing that the FLEX reactor design fully meets its functional and non-functional requirements, through supporting the development and upkeep of a Systems Engineering Strategy. This will involve requirements mapping, requirements traceability reporting, Verification & Validation plans, qualification plans, and test and acceptance documentation. You will apply Systems Engineering thinking to solve real design challenges, integrate, and maximize the system engineering performance in project life cycles, from initiation to closeout.

The role will involve working closely initially with external consultants to develop MoltexFLEX’s Systems Engineering Strategy, growing this into an automated set of system engineering tools that inform the technology and safety case. Whilst the focus of this role is on systems engineering, it will also require a good understanding of the broader nuclear sector and contribution to other engineering and scientific disciplines.

The role will include the following areas of focus:

  • Develop and implement the MoltexFLEX Systems Engineering Strategy
  • Ensuring the design solution at various maturity levels fully meets its requirements and design intent
  • Integrate an appropriate set of systems engineering tools
  • Promote a culture of systems thinking, communication and practice

Qualifications & experience

  • A degree in Engineering and/or relevant supporting industry experience
  • A solid foundation in Systems Modelling and Control
  • Knowledge of Intelligent System Design

Behavioural skills & personality

  • A problem-solver who is driven to find simple solutions and not to over-complicate development and design work
  • Excellent verbal and written communication and presentation skills
  • Ability to collaborate with team members and reach consensus on a way forward

Olivia Mindrila

Interested in this position?

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Olivia Mindrila


I am a Senior Search&Process Consultant focused on bringing qualified talent into the Nuclear Industry. I am set on pioneering nuclear energy being part of the solution for climate change. My passion for the industry drives me to open up discussions with anyone interested in learning more about it, and how they could become part of the journey to achieving NET ZERO.

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