Senior EC&I Designer-Nuclear

Senior EC&I Designer – Sellafield Ponds Programme
Contract | £51-£56/hour (Inside IR35)
Warrington | Hybrid – 3 days on site / 2 days remote
Sector: Nuclear Decommissioning | Sellafield Ponds

We are seeking an experienced Senior EC&I Designer to support major engineering works within the Sellafield Ponds Programme, one of the most complex and high-hazard decommissioning challenges in the UK nuclear sector.

This role will see you taking a senior position within the EC&I design team, leading the development, review, and delivery of high-integrity design packages for safety-critical systems. You will play a key role in ensuring designs meet strict nuclear safety, regulatory, and engineering standards while supporting project delivery across multidisciplinary teams.

Working within a collaborative engineering environment, you will provide technical guidance to designers and engineers, contribute to design reviews, and ensure the production of high-quality EC&I design documentation.

Key Responsibilities

• Lead the development and delivery of EC&I design packages supporting Sellafield Ponds projects

• Produce, review, and check drawings, schematics, and technical documentation for safety-critical systems

• Ensure all design outputs comply with Sellafield procedures, nuclear safety standards, and regulatory requirements

• Support and contribute to design reviews, hazard studies, and technical assurance activities

• Collaborate with multi-disciplinary teams including mechanical, structural, and project engineering

• Provide technical leadership and mentorship to junior and mid-level EC&I designers

• Assist in the verification, validation, and substantiation of engineering designs

Requirements

• Significant experience as an EC&I Designer within the nuclear sector or other highly regulated industries

• Strong understanding of electrical, control, and instrumentation design principles

• Proven experience producing and checking engineering drawings, design documentation, and technical deliverables

• Familiarity with Sellafield standards, processes, and design assurance requirements

• Ability to support technical leadership and mentoring within a design team

• SC clearance preferred, or the ability to obtain

Why Join?

• £51-£56/hour (Inside IR35)

• Hybrid working – 3 days in Warrington, 2 days remote

• Opportunity to work on the Sellafield Ponds Programme, a nationally significant nuclear decommissioning project

• Join a highly experienced engineering team working in a complex, safety-critical environment

Apply now to bring your senior EC&I design expertise to one of the UK’s most important nuclear decommissioning programmes.