{"id":854580,"url":"https://alion.io/job/f-health-physicist","title":"Health Physicist","company":{"id":691631,"name":"Fuse","domain":"f.energy","url":"https://alion.io/company/f-2","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":{"grade":"B","score":78,"open_postings":10,"ghost_share":0,"stale_share":0.9,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-11-01T06:10:25Z"}},"role":"Energy","role_family":"Energy","seniority":"junior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Albuquerque, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":78000,"max_usd":140000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":84},"experience_years_min":2,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"MCNP","optional":false},{"name":"NRC Licensing","optional":false}],"status":"live","first_seen_at":"2026-08-19T17:56:22Z","employer_posted_date":"2026-08-19","last_verified_at":"2026-11-01T23:40:29Z","board_verified":true,"closed_at":null,"days_open":74,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":74},"description":"About Fuse\nWe are building one of the most potentially consequential companies of the century. Our mission is to accelerate the world's transition to fusion energy while safeguarding humankind. This is not a normal company. This is not a normal job. We are committed for the long term to win.\nAbout the Role\nYou are the lead Health Physicist on site, responsible for the technical radiation-protection program: source terms, shielding, instrumentation, dosimetry, surveys, and the operational decisions that flow from them. This is a hands-on lead role.\nCore Responsibilities\nIndependently verify shielding designs developed by physics and engineering - geometry, source definition, tally choice, variance reduction, and uncertainty. Catch the errors before the concrete is poured.\n\nRun MCNP, PHITS, or GEANT4 transport calculations for the fusion generators, target chambers, beamlines, diagnostic ports, and shielded penetrations.\n\nBuild and maintain validated source-term models: D-T neutron yield and spectrum, capture and inelastic gammas, bremsstrahlung, and characteristic line emission.\n\nPerform activation analysis on hardware in the neutron field and produce contact dose-rate vs. cool-down curves that operations can plan around.\n\nDosimetry & Instrumentation\n\nSpecify the radiological instrument fleet from first principles. Match detector physics to field characteristics: pulsed vs. continuous response, neutron energy range, photon discrimination, deadtime behavior, and true dose-equivalent response across the spectrum we produce.\n\nSelect personal dosimetry technology appropriate for mixed neutron/photon fields and tritium-intake monitoring.\n\nBe responsible for the calibration program for high-end instruments to a standard that survives regulator review.\n\nOperational Release & Clearance\n\nBe the technical authority on whether hardware and areas are safe to touch or enter. Survey activated and potentially contaminated hardware, evaluate against release criteria, and document the basis.\n\nDevelop and be responsible for activation-based clearance procedures: wait times, dominant nuclides over time, allowable contact handling, and packaging for off-site transfers.\n\nConduct radiological surveys before, during, and after non-routine operations.\n\nAuthor radiological work permits with credible dose estimates derived from your own field characterization.\n\nPartnership with the Team\n\nSit in design reviews with physicists and engineers from the start, not at the end.\n\nPartner with the RSO: you produce the technical basis; they translate it into licensed scope, procedures, and regulatory submissions.\n\nTrain operators, engineers, and physicists on what their dosimeters and area monitors are actually telling them, including their limitations.\n\nMinimum Qualifications\nMaster's degree in Health Physics, Nuclear Engineering, Radiological Sciences, Physics, or a related field.\n\nCertification by the American Board of Health Physics (CHP). Fuse will support maintenance of certification status.\n\n5+ years of operational health physics experience in environments with non-trivial neutron and photon fields, with at least 2 years in a tritium-handling environment.\n\nDemonstrated production-grade proficiency with at least one major transport code: MCNP, MCNPX, PHITS, GEANT4, or FLUKA.\n\nWorking knowledge of 10 CFR 835 or 10 CFR 20, DOE-STD-1098, DOE-HDBK-1129, and 20.3 NMAC.\n\nHands-on experience with tritium bioassay programs, internal-dose assessment, and ICRP biokinetic models for HTO.\n\nExperience leading activation analysis and authoring defensible \"safe to handle\" decisions on activated hardware.\n\nPreferred Qualifications\nExperience with pulsed radiation sources such as DPF, Z-pinch, ICF drivers, or pulsed accelerators and the dosimetry challenges they create.\n\nPrior role specifying or commissioning a radiation-instrument fleet for a new facility.\n\nTrack record partnering with R&D physicists and engineers as a working collaborator, not a downstream reviewer.\n\nPrior responsibility for DoD/DOE environmental monitoring programs and safety protocols.\n\nExperience integrating radiation controls with non-radiological hazards including HV, vacuum, cryogenics, and lasers, and with broader EHS systems.\n\nFamiliarity with PDM/PLM and document-control practices, including change control for procedures and drawings.\n\nWhat We Value\nGive a shit. Build things you're proud of.\n\nTake responsibility. If something is broken and you can fix it, fix it. See things through.\n\nMove fast. Make decisions, learn quickly, and keep moving forward.\n\nThink bigger. Simplify relentlessly. Don't default to the safe answer.\n\nDisagree and commit. The best idea wins. Once a decision is made, we move.\n\nDesire to win. This is hard. Expect intensity. We are here to win.\n\nPlan B is to make Plan A work.\n\nAdditional Requirements\nThis is not a remote position and will require relocation if not already local to the applicable Fuse facility.\n\nSecurity Clearance\n\nThis role may require the ability to obtain and maintain a U.S. government security clearance.\n\nBenefits\nMedical, dental, and vision coverage.\n\nRelocation assistance for roles that require it.\n\nFlexible time off. Take what you need, no accrual tracking.\n\n2 weeks of paid time off built into the end of each year, subject to team and business needs.\n\nSupportive leave of absence policies.\n\nPaid leave for new parents.\n\nITAR Requirements\nTo conform to U.S. Government technology export regulations, including the International Traffic in Arms Regulations (ITAR), you must be a U.S. citizen, lawful permanent resident of the U.S., protected individual as defined by 8 U.S.C. 1324b(a)(3), or eligible to obtain the required authorizations from the U.S. Department of State.\nEqual Opportunity\nFuse is an Equal Opportunity Employer; employment with Fuse is governed on the basis of merit, competence, and qualifications and will not be influenced by race, color, religion, gender, national origin/ethnicity, veteran status, disability status, age, ancestry, immigration status, sexual orientation, gender identity, marital status, mental or physical disability, or any other legally protected status.","description_format":"text","description_chars":6164,"description_truncated":false,"requirements":{"experience_years_min":2,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"master","optional":false},"security_clearance":false,"languages":[]},"benefits":["Flexible time off","Relocation assistance"],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":true,"industries":["Nuclear Energy"],"lifecycle":[{"event":"open","at":"2026-09-13T05:41:29Z"}],"visa":[],"liveness":{"score":8,"band":"cold","label":"Long shot","p_open":1,"p_active":0.276,"p_room":0.28,"age_days":73,"expected_fill_days":28,"reasons":["conf:2","stale_co","velocity","win:tail","crowd:junior"],"computed_at":"2026-11-01T06:10:25Z"},"pay":null,"html_url":"https://alion.io/job/f-health-physicist","json_url":"https://alion.io/job/f-health-physicist.json","meta":{"generated_at":"2026-11-02T00:17:07Z","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":378,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-03T00:00:00Z"}},"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":691631},"rest":"https://alion.io/mcp/rest/get_company?id=691631"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Ff-health-physicist"},{"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%2Ff-health-physicist"},{"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%2Ff-health-physicist"},{"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/f-health-physicist\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Ff-health-physicist"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":854580}},{"tool":"search_jobs","arguments":{"company":"f.energy","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":854580},"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"}}