Senior Process Engineer 3 positions available Locations: Warrington or Bristol Working Pattern: Hybrid - 3 days per week on site Contract Length: 12 months IR35 Status: Inside IR35 Security Clearance: UK Security Check (SC) - required Start: Subject to clearance & onboarding The Role We are seeking experienced Senior Process Engineers to support a strategically important programme within the UK nuclear sector. This role will be supporting the technical development, assessment and delivery of process solutions associated with the handling, conversion, and potential reuse of reprocessed uranium originating from historic reprocessing operations. You will play a key role in process definition, safety justification, and technical assurance across the fuel cycle, working within a highly regulated nuclear environment. Key Responsibilities Lead and deliver process engineering activities across RepU-related systems and facilities Develop and review process flows, mass balances, PFDs and P&IDs Provide technical input into safety cases, hazard studies (HAZOP/HAZID), and ALARP arguments Support options studies for storage, conversion, enrichment or reuse of RepU materials Interface with nuclear safety, operations, mechanical and commissioning teams Ensure designs comply with UK nuclear regulatory requirements and site licence conditions Contribute to design reviews, technical reports and regulatory submissions Act as a ...