Assystem is a global leader committed to accelerating the energy transition. With 7,850 employees across 12 countries, we tackle the monumental task of switching to low‑carbon energy. Our 55+ years of experience in highly regulated sectors ensure we deliver top‑notch engineering, project management, and digital solutions.
Control Systems Engineer – Fusion and Modular Nuclear (FMN) Business Unit
Join our expanding FMN unit and contribute to cutting‑edge projects that develop technical solutions making net‑zero power generation a reality.
Responsibilities
- Design robust control system architectures that support plant operations, automated sequences, interlocks, and vital protection functions.
- Create high‑quality technical documentation—including control philosophies, functional requirements, logic descriptions, cause‑and‑effect diagrams, and interface specifications.
- Configure and program PLC, DCS, and specialised control platforms in line with nuclear lifecycle standards and industry expectations.
- Collaborate closely with EC&I, process, mechanical, safety, and human‑factors engineers to ensure unified and consistent system performance across all interfaces.
- Integrate intelligent control logic with SCADA/HMI systems, historians, networks, and field instrumentation for smooth and reliable operations.
- Apply best‑practice alarm management aligned with EEMUA 191 and site strategies to ensure clarity, efficiency, and safety.
- Execute rigorous verification and validation activities—including peer reviews, simulations, software testing, FAT, SAT, and commissioning support.
- Develop comprehensive test specifications ensuring alignment with requirements, functional hazards, and safety classifications for full assurance.
- Maintain strong configuration control and software governance, managing versions, coding standards, and baselines within nuclear‑grade quality frameworks.
Why Join Us
- Over 55 years in nuclear engineering.
- Ranked among the top 3 largest nuclear engineering companies.
- Attractive social benefits, employee committee, holiday bonuses.
- Ongoing training with numerous career opportunities.
- 70 % of our managers are promoted internally.
- Hybrid work: 1–2 days remote per week.
Qualifications
- Hands‑on control systems engineering experience in regulated sectors—ideally nuclear, defence, energy, or similarly high‑integrity environments.
- Proven ability to produce detailed control deliverables such as control philosophies, logic diagrams, and sequence descriptions.
- Strong understanding of PLC/DCS programming techniques including structured text, ladder logic, function block, and sequential function charts.
- Experience in verification, testing, simulation, or model‑based methods for validating control logic with precision.
- Knowledgeable in nuclear I&C lifecycle requirements and safety classifications, including IEC 61513, IEC 60880, IEC 61508, IEC 61226.
- Familiar with alarm management best practices and experienced in applying EEMUA 191.
Extras
- Insight into nuclear new‑build control architectures (reactor island, balance of plant).
- Experience with digital twin concepts, advanced simulation, or MBSE methodologies.
- Awareness of cybersecurity requirements for nuclear I&C systems.
- Chartered Engineer status or actively pursuing chartership.
Additional Information
- BPSS and SC required.
- Ability to travel to Assystem offices and customer sites within the UK.
- Work in major UK and international nuclear clients.
Due to the nature of the work, applicants will be required to meet certain residency criteria to attain a minimum level of UK security clearance if not already cleared to a minimum SC level.
We are committed to equal treatment of candidates and promote 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!
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