Company Description Assystem is an international company with one mission: accelerate the energy transition around the world. Every day, our 6,500 switchers located in 12 countries (Europe, Middle East, Pacific Asia & Africa) connect their six thousand billion neurons to tackle the task of the century: switching to low-carbon energy. We are a collective committed to the actors who are making the energy switch. Sharing our knowledge, expertise and values allows us to innovate and think differently about the energy transition. Drawing on more than 55 years' experience in highly regulated sectors subject to strict security and safety requirements, we provide our customers with engineering and project management services, as well as digital services and solutions to optimize the performance of complex infrastructure projects throughout their life cycle. The Group is currently ranked second in the world for nuclear engineering. To ensure a viable, efficient, and reliable energy future for all. Summary of the Role The Mechanical Engineer will be working as part of a multi-disciplinary engineering team within the Client organisation, the primary purpose of the role is to directly support current operations and future programmes. Supporting nuclear facilities & the delivery of services across Client sites The team consists of Mechanical, Civil, Building Services or Electrical Engineers and are responsible for the authorship, development, assessment, and maintenance of Engineering Design Substantiation for Client Facilities, ensuring Design Intent, Critical Safety Factors and Safety and Operational Requirements are met and are consistent with current good practice and legislative/regulatory requirements TASKS Authoring, development, assessment, maintenance and management of the suite of Client Nuclear Infrastructure Design Substantiation documents. Authoring, development, assessment, maintenance and management of design changes/concessions Presentation of Client Design substantiations, to 'Due Process' nuclear safety committees Production and development of Examination, Inspection, Maintenance & Testing (EIMT) Schedule, operating procedures and results to satisfy design requirements and safety case through life Producing Periodic Review of Safety reports Providing advice and direction to internal and external stakeholders Production of Independent Technical Review (ITA)/Independent Peer Review (IPR) Use a combination of general & specialist engineering knowledge and understanding to apply existing and emerging technology Applying appropriate theoretical and practical methods to design, develop, manufacture, construct, commission, operate, maintain, decommission and re-cycle engineering processes, systems, services and products in a nuclear/high risk environment Qualifications EXPERIENCE Essential: Incorporated Engineer status or equivalent experience Experienced Mechanical Engineer with previous knowledge of the following; Marine Diesel Engines and associated systems OR Mechanical Handling Systems including Hoist, Crane and Lift Systems Proven experience of producing robust technical justification to allow for relevant mechanical design modifications to be authorised within a high hazard industry. Use a combination of general & specialist engineering knowledge and understanding to apply existing and emerging technology Apply appropriate theoretical and practical methods to design, develop, manufacture, construct, commission, operate, maintain, decommission and re-cycle engineering processes, systems, services and products in a nuclear/high risk environment Application of the above on a brownfield modifications project Desirable: Ideal candidates would already have experience within a nuclear environment, but this is not essential QUALIFICATIONS & TRAINING Essential: For non-nuclear background candidates, a Nuclear introductory course would be required to be undertaken within 6 months of joining Minimum HNC or equivalent qualification in a relevant discipline. Desirable: Engineering degree Chartered Engineer Additional Information Permanent or Umbrella Contractor SC Clearance required Sole UK National We are committed to equal treatment of candidates and promote, as well as foster all forms of diversity within our company. We believe that bringing together people with different backgrounds and perspectives is essential for creating innovative and impactful solutions. Skills, talent, and our people's ability to dare are the only things that matter. Bring your unique contributions and help us shape the future.