Control Systems Engineer

Description

Provide engineering expertise in the design, development and verification of control systems used in nuclear facilities. The role covers programmable logic controllers (PLCs), distributed control systems (DCS), safety-related I&C functions and supporting systems such as SCADA/HMI. The engineer ensures that control system implementations are safe, compliant and fully traceable to nuclear requirements throughout the project lifecycle.

• 🔍 Execute rigorous verification and validation activities—including peer reviews, simulations, software testing, FAT, SAT, and commissioning support.
• 📑 Maintain strong configuration control and software governance, managing versions, coding standards, and baselines within nuclear-grade quality frameworks.
• 📄 Create high-quality technical documentation—including control philosophies, functional requirements, logic descriptions, cause-and-effect diagrams, and interface specifications.
• 🚨 Apply best-practice alarm management aligned with EEMUA 191 and site strategies to ensure clarity, efficiency, and safety.
• To undertake work packages supporting major UK and international Nuclear Clients.
• 🧪 Develop comprehensive test specifications ensuring alignment with requirements, functional hazards, and safety classifications for full assurance.
• 🤝 Collaborate closely with EC&I, process, mechanical, safety, and human-factors engineers to ensure unified and consistent system performance across all interfaces.
• 🌐 Design robust control system architectures that seamlessly support plant operations, automated sequences, interlocks, and vital protection functions.

Requirements

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.

• 🔧 Hands-on control systems engineering experience in regulated sectors—ideally nuclear, defence, energy, or similarly high-integrity environments.
• BPSS and SC required
• 🏭 Insight into nuclear new build control architectures, including reactor island and balance of plant systems.
• 🌐 Experience with digital twin concepts, advanced simulation, or MBSE methodologies to enhance system development.
• 🌟 Over 55 years in nuclear engineering.
• 🚨 Familiar with alarm management best practices and experienced in applying EEMUA 191 to improve operational clarity and performance.
• 💡 Strong understanding of PLC/DCS programming techniques including structured text, ladder logic, function block, and sequential function charts.
• Ability to travel Assystem offices and customer sites within UK.
• 📊 Proven ability to produce detailed control deliverables such as control philosophies, logic diagrams, and sequence descriptions.
• 🧪 Experienced in verification, testing, simulation, or model-based methods for validating control logic with precision.
• 💻 Integrate intelligent control logic with SCADA/HMI systems, historians, networks, and field instrumentation for smooth and reliable operations.
• 🔐 Awareness of cybersecurity requirements for nuclear I&C systems to support secure and resilient operations.
• 📚 Knowledgeable in nuclear I&C lifecycle requirements and safety classifications, including industry standards like IEC 61513, IEC 60880, IEC 61508, and IEC 61226.
• 🎓 Chartered Engineer status or actively working toward chartership, demonstrating professional commitment and credibility.
• 🧾 Skilled in interpreting P&IDs, process narratives, safety requirements, and mechanical schematics to inform accurate and efficient design.

Benefits

🚀 Join the Fusion and Modular Nuclear Business Unit! 🚀Assystem has an exciting opportunity for a Control Systems 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 making net-zero power generation a reality.

• 📚 Ongoing training with numerous career opportunities.
• 💼 Attractive social benefits, including an engaging Employee Committee and holiday bonuses.
• 🏠 Hybrid work: 1-2 days remote per week.

Training + Development

Interview process

Visa Sponsorship

Security clearance