{"id":3298302,"url":"https://alion.io/job/equal1-cryogenic-systems-engineer","title":"Cryogenic Systems Engineer","company":{"id":673702,"name":"Equal1","domain":"equal1.com","url":"https://alion.io/company/equal1","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":{"grade":"C","score":56,"open_postings":11,"ghost_share":0.727,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-11-06T05:58:05Z"}},"role":"Industrial Engineering","role_family":"Industrial Engineering","seniority":"staff","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["San Jose, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":118000,"max_usd":230000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":1394},"experience_years_min":10,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[],"status":"live","first_seen_at":"2026-07-05T16:42:57Z","employer_posted_date":"2026-07-05","last_verified_at":"2026-11-07T02:21:21Z","board_verified":true,"closed_at":null,"days_open":124,"trust":{"level":"ghost","repost_count":0,"flags":["stale","company_stale"],"days_open":123},"description":"We are seeking an experienced Cryogenic Systems Engineer to join Equal1’s cryomechanical and quantum system integration team. In this role, you will oversee the development of compact mK cryocooler systems from concept through design, assembly, testing, certification, and customer delivery.\nYou will work with absorption and GM coolers, and support the development of Joule-Thomson cryogenic turbocompressor systems with compression cycles at the 4K / 30K temperature stages. The role requires strong cryogenic system design experience, thermodynamic and gas-flow modelling capability, and practical knowledge of vacuum systems, helium handling, CAD, assembly, and temperature control.\nMain Duties and Responsibilities\nDevelop thermodynamic and gas-flow concepts for cryogenic cooling systems, including He-4 and He-3 cycles.\n\nSimulate and analyse cooling cycles, gas flows, thermal performance, and system behaviour.\n\nDefine concepts and requirements for cryogenic components and work with CAD/mechanical teams to realise the designs.\n\nSupport the design and integration of Joule-Thomson cryogenic turbocompressor systems.\n\nOversee manufacturing, assembly, integration, and testing of cryogenic systems and subsystems.\n\nWork with vacuum systems, helium handling, temperature control systems, sensors, and cryogenic instrumentation.\n\nSupport certification and delivery of cryocooler systems to internal and external customers.\n\nExperience and Qualifications\nRequired\n10+ years’ experience in cryogenic system design.\n\nExperience with sub-4K cryostat design and low-temperature system integration.\n\nExperience with GM, pulse tube, and/or Joule-Thomson cryocoolers.\n\nKnowledge of the He-4 / He-3 phase diagram and cryogenic cooling cycles.\n\nCFD and/or thermal modelling experience.\n\nKnowledge of CAD systems, including basic 3D CAD for component design.\n\nPractical understanding of vacuum systems, helium systems, assembly methodologies, and temperature control.\n\nStrong communication skills and ability to work across multidisciplinary engineering teams.\n\nPreferred\nExperience with turbo pumps and/or cryogenic turbocompressor design.\n\nExperience with CTE analysis and cooling cycle design.\n\nExperience supporting certification of complex technical 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