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 protection strategy in a safety-critical environment
Apply Now to take your career in CE&I protection engineering to the next level!

Senior Mechanical Designer
Location: Warrington (initially 5 days/week in office; occasional site visits or travel to other offices)
£35-41/hour Inside IR35
About the Project
Join the Asset Care Project Delivery team, supporting the Mechanical asset care portfolio, with an initial focus on the WVP Compressor Project. This is a key role delivering high-quality mechanical design solutions that ensure operational safety, compliance, and reliability across a range of critical projects.
Role Overview
As a Senior Mechanical Designer, you will:
- Produce engineering design work packages including specifications, drawings, analyses, verification, and assessments that meet legal, functional, and performance requirements.
- Ensure designs are delivered on time, within cost, and to the agreed quality standards.
- Work closely within a multi-disciplinary design team, collaborating with technical and non-technical stakeholders.
- Contribute to mechanical design of piping systems, machinery, and mechanical handling systems, ensuring compliance with relevant standards and legislation.
- Support the integration of designs into operational facilities, providing clear documentation and advice throughout the project lifecycle.
Essential Experience & Skills
- Experience working in a highly regulated industry, preferably nuclear.
- Proven ability to deliver safe, fit-for-purpose, integrated mechanical designs.
- Qualified and experienced Aveva E3D user.
- Mechanical design expertise in piping systems (ASME B31.3, PER, PSSR) and machinery/mechanical handling (Supply of Machinery Regulations, LOLER, PUWER).
- Producing design deliverables such as technical reports, drawings/layouts, installation method statements, and risk assessments.
- Familiarity with British and ISO Standards.
- Ability to liaise with stakeholders across all levels and disciplines.
- Experience in multi-disciplinary, integrated design teams.
Essential Qualifications
- Degree in Mechanical Engineering (minimum 2 years’ design delivery experience) OR HNC/HND with 5+ years design delivery experience.
- Training/qualifications in AutoCAD, Autodesk Inventor, and Autodesk Vault.
Desirable Experience
- Experience in an asset care delivery function on operational facilities, supporting implementation during construction, installation, or commissioning.
- Familiarity with Sellafield Practices, Processes, Engineering Standards, and Engineering Guides.
- Experience responding to Engineering Queries (EQs) and Fault Observations (FOs).
This is a fantastic opportunity for an experienced mechanical designer to work on high-profile asset care projects within a regulated, nuclear environment, contributing to safe and operable mechanical solutions across multiple projects.
