{"id":694960,"url":"https://alion.io/job/lastenergy-senior-nuclear-engineer","title":"Senior Nuclear Engineer","company":{"id":678405,"name":"Last Energy","domain":"lastenergy.com","url":"https://alion.io/company/lastenergy","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Lever","truth_index":{"grade":"B","score":81,"open_postings":22,"ghost_share":0.227,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":403,"computed_at":"2026-11-03T05:54:40Z"}},"role":"Energy","role_family":"Energy","seniority":"senior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Austin, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":105000,"max_usd":191000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":148},"experience_years_min":8,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"MCNP","optional":false},{"name":"MELCOR","optional":false}],"status":"live","first_seen_at":"2025-11-12T17:42:00Z","employer_posted_date":"2025-11-12","last_verified_at":"2026-11-03T11:47:16Z","board_verified":true,"closed_at":null,"days_open":355,"trust":{"level":"ok","repost_count":0,"flags":["company_stale"],"days_open":355},"description":"Last Energy is a fast-growing technology company redefining how nuclear power is designed, manufactured, and deployed. We are building a new generation of modular, distributed nuclear plants engineered for speed, scalability, and real-world impact.\nWe are seeking a Senior Nuclear Engineer to join our core engineering team and drive the analytical rigor behind our microreactor design. This role will act as both a technical leader and independent thinker, directly influencing design decisions that shape the future of energy.\nKey Duties & Responsibilities\nLead and perform complex thermal-hydraulic and neutronics calculations\nIndependently verify and approve engineering calculations and safety analyses prepared by peers and junior engineers\nProvide expert-level review of design basis documents, licensing submittals, and technical evaluations\nMentor and guide junior engineers in analytical methods and modeling techniques\nDevelop and maintain detailed models for reactor systems and accident scenarios\nParticipate in peer reviews and regulatory interactions as a technical authority\nContribute to continuous improvement initiatives by identifying gaps and proposing innovative solutions\n Adapt quickly to evolving project needs, regulatory changes, and emergent technical challenges\nQualifications\nBachelor’s or Master’s degree in Nuclear Engineering or a closely related discipline\n8+ years of experience in nuclear systems analysis, safety analysis, or reactor physics\nProficiency with at least two of the following codes: TRACE, MELCOR, MCNP, VERA, SCALE, SERPENT\nDemonstrated experience performing and reviewing complex engineering calculations\nStrong technical writing and communication skills, with the ability to present to both technical and non-technical audiences\nDepartment of Energy regulatory experience is preferred","description_format":"text","description_chars":1837,"description_truncated":false,"requirements":{"experience_years_min":8,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Nuclear Energy"],"lifecycle":[{"event":"open","at":"2026-09-11T01:44:18Z"}],"visa":[],"liveness":{"score":49,"band":"ok","label":"Likely open","p_open":1,"p_active":0.813,"p_room":0.6,"age_days":355,"expected_fill_days":403,"reasons":["conf:3","win:late","crowd:"],"computed_at":"2026-11-03T05:54:40Z"},"pay":null,"html_url":"https://alion.io/job/lastenergy-senior-nuclear-engineer","json_url":"https://alion.io/job/lastenergy-senior-nuclear-engineer.json","meta":{"generated_at":"2026-11-03T14:07:20Z","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":19766,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-04T00:00:00Z"}},"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":678405},"rest":"https://alion.io/mcp/rest/get_company?id=678405"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Flastenergy-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%2Flastenergy-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%2Flastenergy-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/lastenergy-senior-nuclear-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Flastenergy-senior-nuclear-engineer"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":694960}},{"tool":"search_jobs","arguments":{"company":"lastenergy.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":694960},"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); 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