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Our Vacancy

Technical Lead Engineer – Fire-fighting & Distribution systems

  • Nuclear
  • Permanent /
  • Bristol
  • 07/02/24
  • On site

Assystem is an international company with one mission: accelerate the energy transition around the world.

Every day, our 6,500 switchers located in 12 countries (Europe, Middle East, Pacific Asia & Africa) connect their six thousand billion neurons to tackle the task of the century: switching to low-carbon energy.

We are a collective committed to the actors who are making the energy switch. Sharing our knowledge, expertise and values allows us to innovate and think differently about the energy transition.

Drawing on more than 55 years’ experience in highly regulated sectors subject to strict security and safety requirements, we provide our customers with engineering and project management services, as well as digital services and solutions to optimize the performance of complex infrastructure projects throughout their life cycle. The Group is currently ranked second in the world for nuclear engineering.

To ensure a viable, efficient, and reliable energy future for all.

Job Description

General Assignment

The Fluid Systems Technical Lead will lead, coordinate, support, and participate to activities performed within the Fluid Systems Team (SCF). SCF team is in charge of the design of a wide scope of systems, assigned to 3 Technical Leads, whose scopes are defined as below:

  • Fire-fighting and Distribution systems (JP*, SA*, SE*, SG*, SIR, SKR, SNL) ~4 system engineers (subject to change)
  • Containment, Discharge, Decontamination systems (EVU, EPP, ETY, KER/TER/SEK, 9SBE) ~3 engineers (subject to change)
  • Cooling and Sampling systems (RRI, PTR, 9PTR, REN, RES) ~5 system engineers (subject to change)

Since this organisation will be created early 2024 within the team, the Technical Lead will be in charge of setting-up the organisation and routines of the new Fire-fighting and Distribution systems sub-team, with the support of the Group Leader. The Technical Lead for Fire-fighting and Distribution systems will oversee the engineering activities within his scope of systems, including management of assignments and supporting the Group Leader in the management of workload and schedule, mentoring and supporting system engineers, cascading priorities to the system engineer and escalating difficulties to the Group Leader.

In S1 2024, these activities will include the handover of -JPI system from EDVANCE France teams to SCF team. The Technical Lead will have a key role to ensure the success of these transfers:

  • Assessing the maturity of the systems transferred
  • Understanding the remaining design issues
  • Ensuring clear communication with EDVANCE France in setting up the to-do list and schedule for the transfer
  • Supporting the receiver system engineer in upskilling on the knowledge of the transferred system.

The Technical Lead will also oversee system activities such as:

  • Preparation of the Systems Design Manuals
  • Design of the systems (including definition of the P&ID, thermal-hydraulic calculations, safety features)
  • Population of the “process” specification databases (DIAGRAMS, TAGS2D, DFD, CONDUITE, BANANAS, etc.)
  • Preparation of documents for systems operations (Periodic test)
  • Preparation of documents for the requirements for Control & Instrumentation
  • Management of the supplier feedback from contracts team impacting the design of the systems

The Technical Lead for Fire-fighting and Distribution systems will be responsible for:

  • Acting as a technical specialist for 5 BNI systems scope.

Using knowledge and skills by:

  • Ensuring the ownership of overall Architect role for assigned systems within the BNI systems scope
  • Technical checking of documents such as deliverables and engineering change notes, ensuring quality and respect of milestones
  • Providing advice and support to system engineers regarding system design, technical issues resolution, calculations applying fluid mechanics and thermodynamic principles, modelling
  • Applying UK specific legislation and best practice in the field of BNI systems design
  • Aiding system production if/when necessary
  • Engaging proactively with all stakeholders around the system in Edvance to ensure the delivery of a product meeting the requirements and milestones set by all disciplines (layout, civil, contracts, nuclear safety, hazards, electrical, I&C, environment, commissioning, etc.)
  • Meeting customer’s need (NNB)

Ensuring oversight of:

  • Open Points resolution and Design Changes specification to the Cooling and Sampling systems: supporting the system engineers putting forward technical solutions, driving optioneering and impact analysis, challenging needs for modifications, defining specifications for the changes, then ensuring consistency before integration in system documentation
  • Identification of potential challenges to the delivery schedule and taking action to eliminate risks and ensure committed dates are respected
  • Achievement of contract-driven milestones, such as turnkey contracts documents reviews or implementation of specification updates in due time for components lists issuance

Representing Systems section in technical forums such as:

  • HPC Fluid systems network / technical leads forum
  • Lessons learnt
  • Driving continuous improvement within the Fluid Systems team work by:
  • Supporting the embedment of Nuclear Professionalism and Error Reduction Tools within the work performed by the Fluid Systems team
  • Using learning reports, lessons learned processes
  • Completing pre-job/post-job briefs with engineers for training / activities
  • Being involved in proposing good practises, innovation, improvement of processes, and quality
  • Participating in experience sharing activities within the discipline


Typical positions that may follow this type of role include:

  • Architect (in the sense of System Engineering)
  • Technical referent or development of a career in expertise
  • Group Leader

My profile


  • Mechanical or Process Engineering degree or equivalent qualification
  • Working knowledge of process engineering, thermal-hydraulic calculations, fluid mechanics and modelling
  • Previous experience in systems design for nuclear power plant
  • Knowledge of EPR system design principles, operation and safety rules
  • Knowledge of Instrumentation and Control design
  • Excellent interpersonal skills
  • Ability to effectively manage own workload in order to produce high quality documents and respect deadlines, ability to work under pressure, ability to anticipate difficulties and able to balance conflicting priorities
  • Ability to productively coach and support others within the team
  • Good organizational, writing and oral expression skills in English are essential for the realization of the activities of document production, steering and interfaces with the various correspondents
  • Proactive and confident in communicating with others, particularly those based in remote offices including France and Germany.
  • Proactive in developing positive working relations with others within the project
  • Continuously looking for opportunities to improve quality of engineering studies and the subsequent documentation produced


  • Advanced knowledge of EPR system design principles, operation and safety classification/rules, Instrumentation and Control design
  • Knowledge of main cooling systems on an EPR project, in particular RRI, PTR systems design, or other BNI systems’ design
  • Experience of working on an EPR project, operating nuclear power plant or on an industrial site
  • Ability to read technical documents in French

Due to the nature of work to be undertaken applicants will be required to meet certain residency criteria in order to attain a minimum level of UK security clearance if not already security cleared to a minimum SC level.

We are committed to equal treatment of candidates and promote, as well as foster all forms of diversity within our company. We believe that bringing together people with different backgrounds and perspectives is essential for creating innovative and impactful solutions. Skills, talent, and our people’s ability to dare are the only things that matter !. Bring your unique contributions and help us shape the future.

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