{"id":1381498,"url":"https://alion.io/job/lightbridge-corporation-nuclear-design-engineer","title":"Nuclear Design Engineer","company":{"id":1812456,"name":"Lightbridge Corporation","domain":"ltbridge.com","url":"https://alion.io/company/ltbridge","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":{"grade":"B","score":75,"open_postings":3,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-10-14T06:34:16Z"}},"role":"Industrial Engineering","role_family":"Industrial Engineering","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":[],"countries":[],"hiring_countries":["US"],"hiring_countries_total":1,"salary":null,"salary_estimate":{"min_usd":96000,"max_usd":184000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":555},"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":true,"technologies":[{"name":"Machine Learning","optional":false},{"name":"Python","optional":false}],"status":"live","first_seen_at":"2026-07-14T00:22:32Z","employer_posted_date":"2026-07-17","last_verified_at":"2026-10-14T18:28:48Z","board_verified":true,"closed_at":null,"days_open":92,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":92},"description":"At Lightbridge, we’re pioneering advanced nuclear fuel technology that’s designed to make reactors safer, more efficient, and more responsive to global energy needs. Our mission is bold and we’re looking for equally bold thinkers to help us bring it to life. If you thrive at the intersection of engineering and regulatory strategy, this is your opportunity to help shape the future of clean energy.\nOverview\nThe Nuclear Design Engineer (Junior or Senior) supports the core design and neutronics methodology development and analysis of Lightbridge Fuel for various water-cooled reactor applications. This role contributes to fuel design, analysis, licensing qualification, and commercialization through neutronics modeling, technical documentation, and collaboration with multidisciplinary teams. The scope of responsibility, technical ownership, and leadership increases with experience level.\nResponsibilities\nPerform neutronics and core design analyses in support of the licensing qualification and commercialization of Lightbridge Fuel for water-cooled reactors.\nDevelop, document, and maintain lattice physics and full-core neutronics models using deterministic and Monte Carlo analysis tools.\nIntegrate neutronics results with thermal-hydraulics and fuel performance analyses.\nDevelop and utilize software tools and workflows, including Python-based scripting, to automate analyses, post-process results, and improve efficiency.\nExplore or apply AI and data-driven techniques (e.g., machine learning, surrogate models, automated optimization) to enhance fuel design, modeling efficiency, or decision-making.\nPrepare technical calculations, reports, and licensing support documentation in compliance with quality and regulatory requirements.\nCollaborate with internal project teams, leadership, and stakeholders to meet technical, schedule, and quality objectives.\nSenior level: Lead complex analyses, resolve advanced technical challenges, review and approve technical work products, and interface with regulatory agencies, utilities, vendors, and partners.\nSenior level: Mentor and provide technical guidance to junior engineers and support engineering best practices.\n Required Experience \nJunior Nuclear Design EngineerBS in Nuclear Engineering or a closely related field.\n2-3 years of relevant experience in reactor analysis, core design, neutronics, or nuclear engineering.\nFamiliarity with neutronics concepts and lattice physics modeling through coursework or professional experience.\nExposure to deterministic and/or Monte Carlo neutronics codes.\nIntroductory experience with Python programming for analysis or data processing.\nStrong analytical skills and ability to work effectively in a team environment.\nAbility to access U.S. National Laboratories and pass required background checks and screenings.\n\n Senior Nuclear Design EngineerBS in Nuclear Engineering or a closely related field plus 5+ years of relevant experience, or MS + 4+ years, or PhD + 3+ years (equivalent experience considered).\nProven experience performing and leading neutronics and core design analyses.\nProficiency with industry-standard deterministic and Monte Carlo neutronics codes.\nWorking knowledge of neutronics, thermal-hydraulics, and fuel performance, with experience integrating results across disciplines.\nExperience developing and maintaining analysis methodologies and technical models.\nStrong technical judgment, problem-solving ability, and written and verbal communication skills.\nAbility to access U.S. National Laboratories and pass required background checks and screenings.\n\nPreferred Qualification: \nExperience with lattice physics and core design software, including:CASMO/SIMULATE\nHELIOS/PRESTO\nSCALE/PARCS\n\nExperience with Monte Carlo neutronics codes such as:MCNP\nKENO\nSERPENT\n\nProficiency in Python for workflow automation, data analysis, or tool development.\nExperience or demonstrated interest in applying AI or machine learning methods to engineering analysis, optimization, or large-scale data interpretation.\nExperience developing scopes of work for neutronics analysis supporting fuel qualification, benchmarking, or core reloads.\nExperience with metallic nuclear fuels, particularly U-Zr.\nFamiliarity with ASME Nuclear Quality Assurance (NQA-1) requirements.\nExperience supporting nuclear fuel licensing activities.\nExperience collaborating with utilities, national laboratories, or nuclear regulators.\nSenior level: Prior experience mentoring or training junior engineers.\nLightbridge is committed to supporting the people who power our mission. We offer a comprehensive, competitive benefits program designed to promote well-being, flexibility, and long-term growth, including:\n Competitive salary and performance bonuses, including cash and equity awards\n Remote-first work culture with opportunities for travel\n 100% company-paid health, dental, and vision coverage\n 401(k) with 100% company match\n Generous time off and family care benefits\n Up to 32 hours per year of company-covered professional development course fees\nIf you’re excited about contributing to work that will help shape the future of clean energy, we encourage you to apply. We look forward to learning more about you and the impact you can make at Lightbridge.","description_format":"text","description_chars":5256,"description_truncated":false,"requirements":{"experience_years_min":5,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":false,"languages":[]},"benefits":["Equity","Professional development"],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Nuclear Energy"],"lifecycle":[{"event":"open","at":"2026-09-28T08:34:49Z"}],"visa":[],"liveness":{"score":13,"band":"cold","label":"Long shot","p_open":1,"p_active":0.471,"p_room":0.28,"age_days":92,"expected_fill_days":40,"reasons":["conf:4","win:tail","crowd:"],"computed_at":"2026-10-14T06:34:16Z"},"pay":null,"html_url":"https://alion.io/job/lightbridge-corporation-nuclear-design-engineer","json_url":"https://alion.io/job/lightbridge-corporation-nuclear-design-engineer.json","meta":{"generated_at":"2026-10-14T20:42:52Z","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":27603,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-15T00:00:00Z"}},"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":1812456},"rest":"https://alion.io/mcp/rest/get_company?id=1812456"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Flightbridge-corporation-nuclear-design-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%2Flightbridge-corporation-nuclear-design-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%2Flightbridge-corporation-nuclear-design-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/lightbridge-corporation-nuclear-design-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Flightbridge-corporation-nuclear-design-engineer"}]}