Senior EC&I Engineer
Location: Reading/ Hybrid - 2 days on site every fortnight
Engagement: Long-Term Contract
IR35 Status: Outside IR35
Security Clearance: SC or DV
The Opportunity
We are seeking an experienced Senior EC&I Engineer to join a high-performing engineering team delivering complex, safety-critical projects across the UK nuclear sector.
This is a long-term contract opportunity outside IR35, offering the chance to work on technically challenging programmes spanning design, manufacture, installation and commissioning. You will play a pivotal role within a multi-disciplinary design environment, contributing to projects across the full lifecycle - from early concept through to commissioning and handover.
If you are motivated by solving complex engineering problems in highly regulated environments, this role offers both technical depth and long-term stability.
The Role
As a Senior EC&I Engineer, you will lead and deliver EC&I design activities across nuclear projects. Working closely with Integration and Project Managers, you will take ownership of delegated equipment and systems design, ensuring compliance, safety and technical excellence throughout.
You will be responsible for producing high-quality engineering documentation and ensuring designs meet programme, budget and regulatory requirements.
Key Responsibilities
EC&I Design & Delivery
1. Produce EC&I design concepts and detailed designs including:
Single Line Diagrams (SLDs)
Block Cable Diagrams (BCDs)
Cable schedules
System layouts
2. Develop control system hardware and software designs
3. Produce Functional Safety documentation in accordance with BS EN 61508 & 61511
4. Prepare and maintain LTQR / Technical Files in line with Quality Management Systems
5. Author and review:
Functional Design Specifications (FDS)
System Interface Design Documents (SIDD)
Functional Safety Plans
Basis of Design and substantiation reports
Calculation reports
6. Produce commissioning documentation (FAT, SAT)
7. Support and witness commissioning activities
8. Generate EC&I technical specifications
9. Review in-house and subcontractor drawings
10. Manage and technically oversee subcontract suppliers
Engineering & Compliance
11. Ensure designs comply with relevant British and European standards
12. Address operability, maintainability and safety within all design outputs
13. Demonstrate mitigation of technical risks through formal design justification
14. Produce manufacturing-ready information (drawings, specifications, work instructions)
15. Interpret and produce EC&I drawings using AutoCAD
16. Contribute to internal design reviews and client submissions
Technical Requirements
Essential:
17. Strong EC&I design experience within highly regulated industries
18. Electrical systems design experience
19. Low voltage control gear knowledge
20. Control systems design
21. Ability to produce structured technical documentation
22. Experience compiling design and engineering documentation for approvals
Highly Desirable:
23. Functional Safety experience (BS EN 61508 / 61511)
24. Safety interlock design
25. HVAC control systems experience
26. Nuclear sector experience
Qualifications
27. Degree, HNC or equivalent in a relevant Engineering discipline
28. IOSH Managing Safely or Level 2 Health & Safety (or equivalent)
29. SC or DV clearance
What We’re Looking For
30. A technically strong and detail-oriented engineer
31. Confident working autonomously within a multi-disciplinary team
32. Strong communicator with the ability to present technical solutions clearly
33. Committed to maintaining professional and technical competence through CPD
34. Comfortable operating in high-integrity, safety-critical environments
If you are a Senior EC&I Engineer seeking a long-term, outside IR35 contract within a technically demanding environment, we would welcome your application.