Electrical Engineer

About Assystem

Assystem is among the top three independent nuclear engineering firms worldwide. With over 60 years of experience in highly regulated sectors, the group supports public and industrial stakeholders in the execution of complex and strategic infrastructure projects, subject to high safety and security requirements. Assystem mobilizes 8,000 experts in 13 countries and intervenes across the entire project lifecycle, in engineering, project management and digital solutions.

Join the Fusion and Modular Nuclear Business Unit! Assystem has an exciting opportunity for an Electrical Engineer to join our expanding Fusion and Modular Nuclear (FMN) business unit. As leaders in the design and development of new technologies, you will have the opportunity to work across multiple cutting‑edge projects developing technical solutions that make net‑zero power generation a reality.

Providing engineering expertise in the design, analysis and verification of electrical systems used across nuclear facilities. The role supports new build, operational plant upgrades and decommissioning projects. The engineer ensures electrical designs are safe, compliant and integrated effectively with control, protection and mechanical systems throughout the lifecycle.

• Develop Electrical System Designs: design electrical systems, including single‑line diagrams, load schedules, cable routing, earthing and bonding arrangements, and equipment specifications.
• Produce Design Documentation: create essential design documents such as electrical calculations, protection schemes, coordination studies, panel designs, and installation drawings.
• Apply Nuclear Safety Requirements: interpret and apply nuclear safety requirements, ensuring electrical systems support reliability, maintainability, and defense in depth.
• Undertake Power System Studies: conduct power system studies including load flow, fault level analysis, discrimination, and arc flash assessments when required.
• Select Electrical Equipment: choose appropriate electrical equipment like LV/MV switch gear, transformers, UPS systems, motors, drives, and distribution components suited for nuclear environments.
• Ensure Design Compliance: ensure designs comply with relevant standards such as BS EN 61508, BS 7671, IEC 60364, and nuclear site‑specific requirements.
• Collaborate Across Teams: work closely with EC&I, control systems, mechanical, civil, and safety engineers to ensure seamless integration across interfaces.
• Support Control Systems: support the electrical aspects of instrumentation and control systems, including power supplies, segregation, EMC considerations, and environmental qualification.
• Engage in Design Reviews: participate in design reviews, HAZOPs, failure mode assessments, and engineering substantiation activities to optimise safety and performance.
• Provide Support During Manufacturing & Commissioning: support manufacturing, FAT, SAT, and commissioning phases, resolving electrical design issues and ensuring traceability to requirements.

• Over 55 years in nuclear engineering.
• Ranked among the top 3 largest nuclear engineering companies.
• Attractive social benefits, including an engaging Employee Committee and holiday bonuses.
• Ongoing training with numerous career opportunities.
• 70% of our managers are promoted internally.
• Hybrid work: 1-2 days remote per week.

Skills and Experience

• Proven electrical engineering experience in regulated, safety‑critical sectors—bringing hands‑on expertise from industries like nuclear, defence, or energy.
• Strong grasp of electrical distribution systems—including protection principles and best‑practice installation methods.
• Skilled in creating core electrical deliverables such as SLDs, cable calculations, equipment specs, and protection settings.
• Familiar with nuclear design expectations—from safety classifications and redundancy to segregation and qualification requirements.
• Knowledgeable in key UK and international standards, including BS 7671, IEC/BS EN, ENA docs, and more.
• Excellent communicator and collaborator—experienced working in multi‑disciplinary project environments.

Desirable:

• Able to use…