{"id":3480265,"url":"https://alion.io/job/assystem-principal-nuclear-security-engineer","title":"Principal Nuclear Security Engineer","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":76,"open_postings":223,"ghost_share":0,"stale_share":0.978,"repost_share":0,"time_to_fill_p50_days":29,"computed_at":"2026-11-05T05:54:30Z"}},"role":"Security","role_family":"Security","seniority":"lead","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Glasgow, United Kingdom"],"countries":["GB"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":71000,"max_usd":125000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":28},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[],"status":"live","first_seen_at":"2026-10-29T16:50:58Z","employer_posted_date":"2026-10-29","last_verified_at":"2026-11-05T05:55:17Z","board_verified":true,"closed_at":null,"days_open":6,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":6},"description":"Today, Assystem is among the top three independent nuclear engineering firms worldwide. With over 60 years of experience in highly regulated sectors, the group supports public and industrial stakeholders in the execution of complex and strategic infrastructure projects, subject to high safety and security requirements.\nAssystem mobilizes 8,000 experts in 13 countries and intervenes across the entire project lifecycle, in engineering, project management and digital solutions.\n The role will provide experienced engineering support to the Design Authority responsible for security-related infrastructure and assets. It will support the development and maintenance of engineering evidence, governance and assurance, helping ensure assets continue to meet their required performance throughout their lifecycle.\nThe position will work alongside engineering teams, projects and other stakeholders, providing technical advice, challenge and knowledge transfer while supporting ownership of the function.\nTASKS\nDevelop, review and maintain engineering justification and supporting evidence for security-related assets.\nAssess engineering information and provide proportionate technical advice, challenge and assurance.\nSupport the assessment and control of design changes, modifications and concessions.\nDefine and maintain appropriate inspection, maintenance and testing requirements, including review of results.\nProvide engineering support and assurance to projects through design, commissioning and acceptance.\nSupport periodic review of assets and engineering evidence to identify and manage emerging issues.\nDevelop and improve engineering processes, procedures, standards and guidance.\nUndertake or support independent technical and peer reviews.\nWork collaboratively with client, contractors and other stakeholders across engineering, operations, maintenance and assurance.\nSupport client capability through technical advice, coaching and knowledge transfer.\nEXPERIENCE\nEssential:\nEngineering experience in a high-hazard regulated environment.\nEngineering substantiation or design justification for nuclear structures, systems and components.\nA good understanding of security engineering principles and good practice, such as ONR's Security Assessment Principles (SyAPs) and Technical Assessment Guides, or IAEA guidance.\nA working knowledge of nuclear safety cases and how they relate to security.\nExperience of developing management arrangements or engineering processes.\nDesirable:\nExperience of working with the Ministry of Defence or on defence nuclear programmes.\nExperience of security regulation or assessment.\nExperience of working in a nuclear design authority.\nQUALIFICATIONS & TRAINING\nEssential:\nEngineering degree or equivalent experience.\nRelevant qualification in Security or equivalent experience.\nDesirable:\nChartered Engineer (CEng) or working towards it.\nChartered Security Professional (CSyP).\nWhy join the community of Switchers?:\nThe Group is currently ranked Third in the world for nuclear engineering.\nA dynamic career management policy to enable our employees to progress through our five business lines: operations, project, technical, sales and support functions\nProvide opportunities to work on exciting, global projects\nAccess to an employee assistance programme with free mindfulness, health, wellbeing resources and a confidential support line available 24/7 via phone or text\nDiscount vouchers for days out and restaurants, eye test and glasses vouchers, cycle to work scheme, free flu jabs\nSecurity 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.\nThis role would also require you to be able to gain Developed Vetting.\nTravel to the client site will be required for this role - Our team would be happy to discuss further.\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 !. Bring your unique contributions and help us shape the future.","description_format":"text","description_chars":4673,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[{"language":"English","level":"All levels","optional":false}]},"benefits":[],"hiring_locations":[{"name":"United Kingdom","iso":"GB","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Nuclear Energy","Nuclear Engineering","Engineering Services"],"lifecycle":[{"event":"open","at":"2026-10-29T19:57:27Z"}],"visa":[],"liveness":{"score":63,"band":"ok","label":"Likely open","p_open":1,"p_active":0.627,"p_room":1,"age_days":6,"expected_fill_days":29,"reasons":["seen:6","stale_co","velocity","win:early","comp:brand"],"computed_at":"2026-11-05T05:54:30Z"},"pay":null,"html_url":"https://alion.io/job/assystem-principal-nuclear-security-engineer","json_url":"https://alion.io/job/assystem-principal-nuclear-security-engineer.json","meta":{"generated_at":"2026-11-05T06:10:45Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":7612,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-06T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":5278},"rest":"https://alion.io/mcp/rest/get_company?id=5278"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fassystem-principal-nuclear-security-engineer"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fassystem-principal-nuclear-security-engineer"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fassystem-principal-nuclear-security-engineer"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/assystem-principal-nuclear-security-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fassystem-principal-nuclear-security-engineer"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":3480265}},{"tool":"search_jobs","arguments":{"company":"assystem.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":3480265},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. Docs: https://alion.io/developers"}}