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

Collabo...