ASSYSTEM
Principal EC&I Engineer / Protection Engineer
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Principal EC&I Engineer / Protection Engineer - Accelerating the Energy Transition
About Assystem
Assystem is an international company driven by a single mission: accelerating the energy transition worldwide.
With 8,000 employees across 12 countries (Europe, Middle East, Pacific Asia, and Africa), we empower the global low-carbon energy shift. Our experts—spanning 55+ years of experience in highly regulated sectors like nuclear—provide engineering, project management, and digital solutions to optimise complex infrastructure.
Ranked second globally for nuclear engineering, we champion innovation by fostering collaboration, knowledge-sharing, and a collective commitment to-energy transition stakeholders.
Today, we design a viable, efficient, and reliable energy future for all.
The Role: Principal EC&I Engineer / Protection Engineer
🌟 Core Responsibilities
**🎯 Lead & Innovate: Technical & Team Leadership
- Guide EC&I (Electrical, Control & Instrumentation) engineering teams in delivering high-impact, innovative solutions for complex projects.
- Mentor and support individuals, setting clear goals and fostering a collaborative, high-performance environment.
📊 Model & Analyze: Electrical Engineering Expertise
- Create and update the digital ETAP model for projects—ensuring technical robustness and project alignment.
- Conduct fault calculations (per BS EN 60909) for electrical infrastructure.
- Produce technical reports and arc flash risk assessments.
🛠️ Design & Standards: Substation & Protection Specialism
- Oversee 11kV & 400V substation design. Expertise in unit protection systems, including:
- Differential protection schemes
- High-impedance relays
- Drive continual improvement by contributing to Sellafield’s engineering standards and industry best practices.
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📋 Risk & Compliance: H&S & Environmental Focus
- Plan and prioritise tasks while ensuring alignment with Health & Safety (H&S), environmental regulations, and project deadlines.
⚡ Design & Technical Reviews
- Chair design review meetings, facilitate technical discussions, and lead formal evaluations as the Lead Engineer.
📈 Budget & Project Oversight
- Collaborate with Project Managers to minimise costs, delays, and conflicts while remaining within programme deadlines.
🧩 Client Liaison & Cross-Functional Coordination
- Serve as the primary technical contact for clients, facilitating seamless delivery across all project phases.
Requirements
✅ Essential Qualifications
🎓 Professional Degree or Equivalent Experience
- A degree in Electrical, Instrumentation or Control Engineering (or equivalent HNC/HND with substantial professional experience).
- Desirable: Honours-level or advanced degree in a relevant electrical discipline.
🔧 Technical Expertise
- Thorough knowledge of:
- BS EN 60909 (Fault Calculations standards).
- Power distribution modelling software (e.g., ETAP, DigSilent).
- Protection and control systems for 11kV/400V networks.
- 11kV & 400V substation design experience (upgrades, retrofits, or proprietary technologies).
- Unit protection calculations (including differential and high-impedance schemes).
🏗️ Sector-Specific Knowledge
- Experience with Sellafield Distribution Network, its electrical safety protocols, and legacy infrastructure.
- Familiarity with nuclear or decommissioning engineering best practices (radioactive/flammable environments).
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🇬🇧 Security Clearance
- Essential: Valid Safety Check (SC) clearance (no caveats).
- Critical: UK national or dual national with UK MoD approval from a non-ITAR country.
📚 Desire for Chartership
- Preference for candidates already Chartered (or on-track to IEng/CEng registration).
💼 Desirable Experience
- Sellafield’s design processes, especially for nuclear facilities.
- Additional software stack (e.g., Trimble TCS NAAP, ERACs, SCADA, IEC61850 for substation automation).
Benefits & Culture
- Drive impact: Your work accelerates clean energy solutions, shapes standards, and protects critical infrastructure.
- Professional growth: Career opportunities in nuclear decommissioning, power generation, and energy systems.
- Diversity & inclusion: At Assystem, backgrounds and perspectives drive innovation. What matters is your talent, curiosity, and commitment to the role.
- Security: Clearance support, purpose-driven projects, and skills development.
We don’t just deliver projects—we build a cleaner, safer future.
Let’s work together. Your unique expertise can inspire change.
This role is based at Sellafield (UK) and operates within a nuclear-related Environment.
⚠️ Important: Assystem never requires: ✖ CV writing services. ✖ Payment during recruitment. ✖ Disclosure of sensitive personal data.
Join Assystem and be part of the global energy transition team.
-- Next steps: Apply via [Assystem’s careers portal]. For questions, contact [Recruitment Team].
Purpose. Safety. Impact.
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