An opportunity has arisen for an experienced CS&A Design Engineer with site experience of upgrading civil infrastructure and structural design and loading of in pond furniture. This is a full time contract role inside IR35 with a requirement to spend a minimum of 3 days per week in the Whitehaven offices or Sellafield Site when required. Only apply if you are a British Citizen and passport holder and not have worked outside the UK during the past 5 years. Candidates can start with BPSS security clearance whilst higher level clearance is being undertaken. This is an exciting opportunity to become part of an established team working on an emerging project at Sellafield. This role offers the chance to work in a dynamic and forward-thinking environment to deliver a project of national importance. The successful candidate will work closely with the Project Engineering Manager, multi-disciplinary project teams, and the Client on a fast-paced project. ROLE DESCRIPTION Produce NFR and feasibility documentation to justify and support design decisions. Prepare construction orders, including undertaking detailed site surveys to inform design development. Ensure all plans, drawings, and quantities are accurate and suitable for technical calculations. Manage and/or produce design documentation, including drawings and technical specifications. Control and coordinate configuration management of engineering deliverables and associated site works. Liaise with designers and stakeholders to ensure full compliance with design and construction regulations. Provide regular progress reports and technical updates to the CS&A Responsible Engineer (RE). Plan and prioritise work efficiently, adapting to any setbacks or technical challenges encountered. Use AutoCAD, Navisworks, and 3D scanning software proficiently to transfer accurate site data to the design team. Contribute practical site knowledge and technical input to Design and Constructability Reviews. ESSENTIAL EXPERIENCE & QUALIFICATIONS Hold an HNC/HND in Mechanical Engineering (or equivalent qualification). Demonstrate strong plant knowledge and experience working within an operational environment. Have working experience using CIMAGE on the SL System. A positive can-do attitude, excellent communication and collaboration skills with the ability to work effectively across diverse project teams. Must hold appropriate Security Clearance (SC and British Sole National) and be a Sellafield pass holder.