We're looking for a Senior Electrical, Control & Instrumentation Designer opportunity within the UK nuclear sector on a permanent basis, offering hybrid working from Warrington or Preston and long-term career progression on nationally significant programmes. This is a senior-level design role for someone who enjoys shaping high-quality EC&I solutions, guiding others, and seeing designs through the full lifecycle — from concept to in‑service support. You’ll sit at the heart of complex nuclear projects, influencing standards, mentoring designers, and helping deliver work that genuinely matters. You won’t be boxed into pure production. This role blends hands-on design, technical authority, and leadership, making it ideal for a designer ready to step up or someone already operating at senior level but wanting better balance and progression. What you’ll be involved in: Providing technical leadership and design governance across EC&I activities Checking, approving and allocating work for a team of designers Ensuring designs meet regulatory, safety and quality standards Supporting client interactions and resolving technical or delivery challenges Producing and reviewing EC&I design documentation across all design stages Leading low-risk, multi-discipline work packages when required Contributing ideas, innovation and continuous improvement across the design functionWhat they’re looking for: Pr...