{"id":2181553,"url":"https://alion.io/job/assystem-mechanical-engineers","title":"Mechanical Engineers","company":{"id":5278,"name":"Assystem","domain":"assystem.com","url":"https://alion.io/company/assystem","size_band":"5000+","is_staffing_agency":false,"employer_type":"services","is_intermediary":false,"listed_via":null,"ats_vendor":"SmartRecruiters","truth_index":{"grade":"B","score":75,"open_postings":198,"ghost_share":0,"stale_share":0.995,"repost_share":0,"time_to_fill_p50_days":27,"computed_at":"2026-10-10T05:45:15Z"}},"role":"Industrial Engineering","role_family":"Industrial Engineering","seniority":null,"employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Derby, United Kingdom"],"countries":["GB"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":32000,"max_usd":70000,"period":"year","method":"role_country_seniority_unknown","sample_n":667},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[],"status":"live","first_seen_at":"2026-10-09T14:48:48Z","employer_posted_date":"2026-10-09","last_verified_at":"2026-10-11T17:02:37Z","board_verified":true,"closed_at":null,"days_open":2,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":2},"description":"Assystem is an international company with one mission: accelerate the energy transition around the world.\nEvery 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.\nWe 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.\nDrawing 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.\nTo ensure a viable, efficient, and reliable energy future for all.\n The Role:\nReporting to the Turbine Island Senior Mechanical Engineer, you will be responsible for various Turbine Island design development activities. The Mechanical Engineer shall work closely with multi-disciplined teams and the supply chain to help deliver the Turbine Island design.\nKey Responsibilities:\nActing as an Intelligent Customer, involved in checking supplier deliverables, including design against requirements.\n\nDevelopment and checking with support of Senior Engineers of Process Flow Diagrams, Piping and Instrumentation Diagrams, Layout Drawings, Component Sizing Calculations, Component and Equipment Datasheets and Specifications, and other concept or detailed design related documents\n\nDevelopment and checking with support of Senior Engineers of Optioneering Studies or Decision Record Files, Design Descriptions, Requirement Specifications, among other design development activities\n\nApplication of Systems Engineering, including development and review of Functional and Design Requirements\n\nIntegration of Turbine Island design into wider power plant\n\nInterface with wider Turbine Island team and stakeholders\n\nAttend Design Reviews and HAZID/HAZOP studies with multidisciplined teams\n\nParticipate in nuclear safety licensing, environmental planning /permitting, and other interface activities that are relevant to the Turbine Island scope\n\nEnsure adherence to the company statutory H&S Policies and rules and compliance with the project and Quality Management System\n\n Your Background:\nPrevious experience, in the nuclear sector or other highly regulated industries such as thermal power generation or oil and gas and process sectors. Good experience and background in thermal power systems and equipment such as steam turbines, condensers, feedwater heaters, pumps, and piping systems. \nPreferably with good experience in similar roles with specific emphasis on FEED through to detailed design and EPC delivery. \nDevelopment of procurement specifications and working with equipment suppliers. \nStrong technical background and broad experience in thermal power or similar projects. \nExcellent communication skills and ability to interact with internal and external stake holders. \nAbility to identify and manage critical interfaces on major projects. \nGood knowledge of UK Health and safety regulations, safety systems, HAZOP and engineering substantiation and technical standards. \nAppreciation and application of ASME, European and UK codes and standards. \nSystems Engineering experience or awareness desirable. \nPersonal Specification/Attributes:\nResults oriented, ability to work independently and proactively as part of a team, good organisation skills, ability to deal with confidential and sensitive nuclear information in a professional manner and in-line with export control obligations. \nBachelor’s degree or Higher National Diploma in an engineering discipline. \nCEng in a relevant discipline or working towards Professional Registration. \nSC Clearance or capable of achieving it. \n Security clearance:\nDue to the nature of work to be undertaken applicants will be required to meet certain residency criteria in order to attain a minimum level of UK security clearance if not already security cleared to a minimum SC level.\nWe 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.\nNOTICE TO CANDIDATES ON RECRUITMENT FRAUD - We are committed to safeguarding candidates from fraudulent activity associated with our recruitment process. Please note that we will never offer specialist CV writing services, request payment or ask for sensitive personal information during the recruitment process.\nWe 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 !. 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