{"id":2823723,"url":"https://alion.io/job/2026-information-systems-laboratories-inc-senior-nuclear-engineer","title":"Senior Nuclear Engineer","company":{"id":4391089,"name":"2026 Information Systems Laboratories, Inc.","domain":"islinc.com","url":"https://alion.io/company/islinc","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"WP Job Openings","truth_index":null},"role":"Energy","role_family":"Energy","seniority":"senior","employment_type":null,"work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["United States"],"countries":["US"],"hiring_countries":["US"],"hiring_countries_total":1,"salary":null,"salary_estimate":{"min_usd":105000,"max_usd":187000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":30},"experience_years_min":15,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"MCNP","optional":false},{"name":"NRC Licensing","optional":false},{"name":"RELAP5","optional":false},{"name":"ASME NQA-1","optional":true},{"name":"Java","optional":true},{"name":"Python","optional":true}],"status":"live","first_seen_at":"2026-08-11T14:47:11Z","employer_posted_date":"2026-10-14","last_verified_at":"2026-11-05T04:11:57Z","board_verified":true,"closed_at":null,"days_open":85,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":85},"description":"Job Type: Full Time\nJob Location: Idaho Falls, ID, or eligible for remote work depending on experience\nInformation Systems Laboratories, Inc. (ISL) is seeking a Senior Nuclear Engineer for a full-time position on the Nuclear Safety Analysis team. ISL (www.islinc.com) is a high-tech, employee-owned technology-development company. ISL’s Energy, Space, and Risk Management division provides comprehensive support to the nuclear and space industries, including nuclear safety analysis, complex modeling and simulation, nuclear software development throughout the entire software lifecycle, regulatory framework and procedures development, waste management tracking, risk management, and cybersecurity.\nJob Description\nThe analyst will work alongside safety analysis experts performing a mix of research and development and customer contract work. Customers are generally advanced reactor and fuel vendors requiring ISL’s unique safety analysis expertise to meet licensing requirements of the U.S. NRC or DOE.\nISL has a culture of building from fundamentals to solve complicated engineering problems in the nuclear industry, including modeling and simulation of:\nSystem and core thermal-hydraulics (RELAP5-3D, TRACE, VIPRE-01)\nNuclear physics (MCNP, SCALE, PARCS)\nFuel performance (FAST)\nRadiological consequences (RADTRAD)\nWork tasks may include hazard analysis, safety basis event identification, model and simulation development, transient analyses, and safety basis documentation for existing LWR, SMR, and advanced reactor designs.\nThis position includes writing technical reports and white papers, creating presentations, and other related tasks needed to communicate ideas, problems, and solutions.\nThe position offers a unique opportunity to advance the state of the art, publish research, present at conferences and workshops, and develop industry contacts and relationships.\nRequirements\nA B.S. or M.S. degree in Nuclear or Mechanical Engineering\n15-20 years of experience in the nuclear industry\nPrior safety analysis and/or reactor design experience\nA self-starter who:Works well within a team or independently\nHas demonstrated ability to solve complex problems\nCan adapt to changing situations\nDemonstrates a strong commitment to verifying results and ensuring they are technically sound\n\nExperience with fluid dynamics, heat transfer, nuclear physics, and/or structural mechanics\nExperience with RELAP5-3D or TRACE\nExperience with U.S. NRC licensing (NUREGs, Reg. Guides, etc.)\nExperience with safety basis events, categories, and transient analysis\nFamiliarity with historic, operating, and advanced nuclear reactors\nDesired Skills\nDemonstrated knowledge of the fundamentals of nuclear physics\nFamiliarity with nuclear quality assurance (ASME NQA-1)\nFamiliarity with U.S. DOE authorization basis\nExperience with design basis accident dose analysis\nExperience with radiation shield design and modeling and simulation\nExperience with:\nGeneral calculation software such as Mathcad and/or Octave,\nNuclear physics codes such as MCNP, SCALE, PARCS, etc.,\nCFD and Multiphysics codes,\nSolid modeling or CAD, and\nBasic scripting or light programming skills (Python, Java, etc.)\nSecurity Clearance\nThis position requires eligibility to obtain and maintain a U.S. Government security clearance.\nEqual Employment Opportunity\nInformation Systems Laboratories, Inc. (ISL) is an Equal Opportunity Employer. We provide equal employment opportunities to all qualified applicants and employees without regard to race, color, religion, sex, pregnancy, sexual orientation, gender identity, national origin, age, disability, genetic information, protected veteran status, or any other characteristic protected by applicable federal, state, or local law.\nISL provides reasonable accommodation to qualified individuals with disabilities in accordance with applicable law.\nHow to Apply\nTo apply, please send your resume to Human Resources at ","description_format":"text","description_chars":3943,"description_truncated":false,"requirements":{"experience_years_min":15,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"master","optional":false},"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Government","Military","Science & Engineering"],"lifecycle":[{"event":"open","at":"2026-10-18T19:56:24Z"}],"visa":[],"liveness":{"score":14,"band":"cold","label":"Long shot","p_open":1,"p_active":0.489,"p_room":0.28,"age_days":85,"expected_fill_days":35,"reasons":["conf:1","win:tail","crowd:"],"computed_at":"2026-11-05T05:54:30Z"},"pay":null,"html_url":"https://alion.io/job/2026-information-systems-laboratories-inc-senior-nuclear-engineer","json_url":"https://alion.io/job/2026-information-systems-laboratories-inc-senior-nuclear-engineer.json","meta":{"generated_at":"2026-11-05T07:59:02Z","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":10155,"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":4391089},"rest":"https://alion.io/mcp/rest/get_company?id=4391089"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2F2026-information-systems-laboratories-inc-senior-nuclear-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%2F2026-information-systems-laboratories-inc-senior-nuclear-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%2F2026-information-systems-laboratories-inc-senior-nuclear-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/2026-information-systems-laboratories-inc-senior-nuclear-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2F2026-information-systems-laboratories-inc-senior-nuclear-engineer"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":2823723}},{"tool":"search_jobs","arguments":{"company":"islinc.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":2823723},"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. 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