ASSYSTEM
Senior Principal EC&I Engineer

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Company Description
Today, 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.
Job Description
Senior Principal EC&I Engineer
Location: Warrington
Type: Staff - Permanent
Role Summary
β‘ Senior Principal EC&I Engineer
The Senior Principal EC&I Engineer is fully accountable for all electrical, control & instrumentation (EC&I) engineering within their area, ensuring work is safe β , compliant π, and fit for purpose π§ across the full lifecycle.
They provide technical leadership π·ββοΈ, set standards, oversee assurance, and retain responsibility for all engineering decisions (including delegated ones).
Essential Experience
- Proven EC&I delivery in regulated, safety-critical environments β οΈ
- Strong track record of technical accountability & decision-making π§
- Leading multi-disciplinary teams π₯ and resolving complex risks
- Working with projects, safety, regulators & assurance bodies π€
- Promoting safety, quality & compliance culture π‘οΈ
Reasons to use Rodeo
Iβm in my final year doing Economics and I donβt know whether to apply for grad schemes now or do a masters first. What do you think?
Honest answer β it depends on where you want to end up. A lot of top grad schemes (Big 4, civil service, banking) donβt need a masters. Letβs look at the ones youβd be competitive for now, and we can decide if a masters actually adds anything.
Also worth knowing: most autumn 2026 applications are open now. Timing matters more than you think.
Start with a chat, not a search bar
Grad scheme, placement, apprenticeship? Not sure what you want yet β that's fine. Your agent talks it through with you and turns "I have no idea" into a shortlist.
Graduate Consultant β 2026 Scheme
Why you're a good match
StrongYour economics background and your summer at a regional bank line up with what PwC looks for on the consulting scheme. Applications close in four weeks.
See breakdownIt searches the market for you
Every day your agent scans the market matching roles against what actually matters to you, not just keywords on a CV.
Why you're a good match
Youβve got the grades and the economics background, and your bank internship is exactly the experience this scheme looks for. Apply soon β deadlines close within the month.
Experience fit
Your summer at the bank plus your econometrics coursework map directly to the day-one responsibilities on this scheme β client modelling, market briefings, and deal support.
Only hits
No noise. No "maybe this fits." Just roles with a clear explanation of why they're right β and where to focus when applying.
Desirable Experience
- Experience as an Senior Principal EC&I Engineer (or equivalent) in nuclear/high-hazard environments β’οΈ
- Full lifecycle delivery: concept β commissioning β handover π
- Knowledge of SEMS & gated engineering processes π
Qualifications
Essential Qualifications
- Degree (or equivalent) in Electrical, Control, or Instrumentation Engineering β‘
- Extensive EC&I experience suited to a Responsible Engineer role π·ββοΈ
- Chartered Engineer status π (or equivalent experience)
- Ability to meet security clearance & site access requirements π
- SQEP compliant with SR0696 & ED21 standards π
Desirable Qualifications
- Fellowship / senior membership π of a professional engineering body
- Training in nuclear safety β’οΈ, functional safety π‘οΈ, or systems engineering π§
- Postgraduate qualification π in engineering or management
Additional Information
Whilst we encourage applications from all nationalities, Assystem within the UK are subject to security and export control restrictions due to the nature of work to be undertaken.


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These restrictions mean that factors including your nationality, any previous nationalities you have held, and/or your place of birth may limit those roles that you can perform for the organisation.
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 peopleβs ability to dare are the only things that matter! Bring your unique contributions and help us shape the future.
ASSYSTEM Job: Engineering / Technical
Type of contract ASSYSTEM: Permanent
ASSYSTEM Sector: Nuclear
βIt took my CV and asked me questions relevant to understanding what kind of jobs to suggest for me. Suggestions were almost perfect. Jobs were exactly what Iβve been looking for.β
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