Principal EC&I Engineer / Protection Engineer

Assystem -
Warrington

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Job details

Permanent

Qualifications

CAD
Engineering
Computer networking

Full job description

Nuclear
Permanent /
Warrington
United Kingdom
10/07/26
On site

About Assystem

Assystem is an international company with one mission: accelerate the energy transition around the world.

Every day, our 8,000 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

Join Assystem as a Principal EC&I Engineer/ Protection Engineer!

What You’ll Do:

️ Lead & Deliver: Guide EC&I engineering teams in delivering innovative solutions for complex projects.

Creation and updating: The working ETAP model for the project

️Production of: fault calculations

Protection of: reports and arc flash risk assessments

Power and protection specialism: Support to the wider design team. Contribute to the updating of Sellafield’s engineering standards and best practice.

Plan & Prioritize: Shape project plans, prioritizing Health & Safety and Environmental standards.
Design Reviews: Act as Lead Engineer, overseeing design reviews, technical discussions, and formal evaluations.
Support & Collaborate: Provide expert advice, supporting both staff and clients through technical challenges.
Mentor & Motivate: Mentor team members, set objectives, and foster a collaborative work environment.
Optimize: Ensure projects stay on budget and aligned with schedules, working closely with Project Managers.
Client Liaison: Serve as the primary technical contact, coordinating with clients throughout each project.

My profile

Required Experience

Essential

Working knowledge of BS EN 60909 Fault Calculations
Working knowledge of power distribution modelling software
Experience with Protection and control systems (11kV & 400V)
Experience of 11kV & 400V substation design
Experience of unit protection calculations (differential & high-impedance schemes)
Relevant design experience relating to Electrical infrastructure upgrades and working with aging assets.
Working knowledge of the Sellafield Distribution Network and its electrical safety practices

Desirable:

Experience of Sellafield Design Processes
Experience with other CAD tools namely Trimble, ERACs and Digsilent
Experience with IEC61850 and power system SCADAs
Chartered Engineer or working towards chartership with the relevant discipline.

Qualifications required

Essential

A degree in a relevant engineering discipline (generally Electrical, Instrumentation or Control Engineering) or HNC / HND with substantial relevant professional experience.

Desirable

Degree in a relevant engineering discipline (generally Electrical, Instrumentation or Control Engineering at Honours level or higher.

**Security clearance**

This role requires the successful candidate to hold a minimum of a Security Check (SC) clearance without any caveats to that clearance.

Due to the nature of work this role will be delivering and for the protection of certain assets, the successful candidate has to be a UK national or in MoD approved cases a Dual National from a non-ITAR country.

NOTICE TO CANDIDATES ON RECRUITMENT FRAUD – We are committed to safeguarding candidates from fraudulent activity associated with our recruitment process. Please note that we will never offer specialist CV writing services, request payment or ask for sensitive personal information during the recruitment process.

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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About Assystem

Job Description

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