Senior ECandI EngineerLocation: WarringtonContract: 12 monthsRate: 51 to 57 per hour (Umbrella, inside IR35)Must be eligible for security clearance The Opportunity We are looking for Senior Electrical, Control and Instrumentation (ECandI) Engineers to support major projects from our Warrington office on a long-term contract basis. This role offers the chance to take technical ownership across a variety of complex and high-profile projects - applying your ECandI expertise to deliver safe, compliant, and high-quality engineering solutions within the UK''s leading nuclear engineering business. You''ll play a key role in the design, coordination, and delivery of engineering packages, providing guidance to less experienced engineers and ensuring that all technical outputs meet rigorous industry and company standards. What You''ll Be Doing Lead the development and delivery of ECandI designs, ensuring compliance with relevant standards, specifications, and regulations. Provide technical direction and mentoring to junior engineers and designers. Prepare, review, and approve design documentation including calculations, drawings, models, and technical reports. Maintain design integrity and configuration control throughout the project lifecycle. Participate in safety assessments, risk reviews, and design verification activities. Support project planning, scheduling, and progress reporting in collaboration with Project Managers. Act as Engineering Lead or Technical Authority when require