Principal CE&I Protection Engineer - Hybrid (Sellafield Project) Location: Warrington - 1 day per week on-site, 4 days WFH (with occasional site visits) £56-61/hour Inside IR35 Project: Sellafield Electrical Distribution Network Upgrade - Infrastructure Strategic Alliance The Opportunity: Join the CE&I design team delivering power systems and protection engineering for a high-profile Sellafield project. You'll play a key role in shaping the Electrical Distribution Network Upgrade through cutting-edge modelling, fault analysis, and protection system design. Key Responsibilities: Develop and maintain the project's working ETAP model Produce and review fault calculations Support protection and control system design for 11kV & 400V networks Collaborate with multidisciplinary teams to deliver high-quality designs Essential Experience: Strong knowledge of BS EN 60909 Fault Calculations Skilled in power distribution modelling software Hands-on experience with protection and control systems (11kV & 400V) Desirable Experience: Familiarity with Sellafield Design Processes Experience with CAD tools such as Trimble, ERACs, Digsilent Knowledge of IEC61850 and power systems SCADAs Chartered Engineer status, or working towards chartership in a relevant discipline Why Join Us? Flexible hybrid working (WFH 4 days/week) Work on a high-impact, long-term Sellafield project Opportunity to shape power systems and pr...