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Our Vacancy

PES Engineer Senior /Principal

  • Nuclear
  • Permanent / Engineering / Technical
  • Warrington
  • 20/03/24
  • 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

The role will require the individual to deliver the project PES deliverables tailored process of ISO 15288 (SL QMS, standards, and guides) and be the Lead PES engineer for the allocated project(s) with regard to PES delivery for the Technical Processes in the V-model in the following diagram.  Including authoring, checking, and reviewing deliverables from internal and external sources, verification and validation, quality, time, and cost management.

Key Responsibilities:

  • Production of User Requirement Specifications,
  • Production of Functional Requirement Specifications
  • Production Sequence Interlock Diagrams
  • Production of Graphic Requirements and User Interface Requirement Specifications
  • Manage Cyber security reviews and Cyber Security Justification Reports production
  • Panel Design Requirements
  • Installation Design Requirements
  • Production of EOs and Tender Packages for allocated project(s)
  • Working closely with the supply chain and system integrators, including giving guidance/support.
  • Managing and reviewing supply chain and system integrators deliverables and providing the appropriate feedback to ensure fit for purpose designs and quality
  • Overseeing System Testing as a client lead.


Required to work closely and collaboratively within the Integrated project teams including team engineers, other disciplines, stakeholders, project management, cost controls and the supply chain.

My profile


  • Experience delivering Programmable Electronic Systems (PES) in accordance with SL PES Standards – from design to implementation
  • Strong stakeholder management skills


  • Experience with C# applications
  • Camera systems, especially spherical cameras
  • Data management for images
  • Experience with new system development with Sellafield Information Services Organisation (ISO)
  • Geospatial data management systems
  • Cyber Security of Windows based systems
  • Understanding of Docker based containerised software systems


Security clearance:

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.

Apply Now:

To apply forward your CV on this advertisement, if you have any queries about the role or would like a full job spec please contact Aidan at Assystem

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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