{"id":3355731,"url":"https://alion.io/job/quantinuum-advanced-mechanical-design-engineer-cryo-optical-vacuum-systems-1088","title":"Advanced Mechanical Design Engineer - Cryo, Optical, Vacuum Systems - 1088","company":{"id":696,"name":"Quantinuum","domain":"quantinuum.com","url":"https://alion.io/company/quantinuum","size_band":"501-1000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Lever","truth_index":{"grade":"B","score":78,"open_postings":10,"ghost_share":0,"stale_share":0.9,"repost_share":0,"time_to_fill_p50_days":46,"computed_at":"2026-10-30T05:48:23Z"}},"role":"Industrial Engineering","role_family":"Industrial Engineering","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":["Broomfield, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":130000,"max":165000,"currency":"USD","period":"year","gross":null,"usd_annual":165000},"salary_estimate":null,"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"GD&T","optional":false}],"status":"live","first_seen_at":"2026-10-22T15:33:04Z","employer_posted_date":"2026-10-22","last_verified_at":"2026-10-30T04:54:15Z","board_verified":true,"closed_at":null,"days_open":7,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":7},"description":"We are seeking an Advanced Mechanical Design Engineer - Cryo, Optical, Vacuum Systems in our Broomfield, CO location to help design and de-risk next-generation trapped-ion quantum computing hardware. This role will work closely with research scientists, system architects, design engineers, and lab engineers to develop mechanical systems compatible with cryogenic operation, UHV/XHV environments, precision optical alignment, and scalable quantum computer architectures. The ideal candidate is a hands-on mechanical designer who can turn ambiguous technical risks into practical designs, prototype tests, and clear engineering recommendations.\nAll applicants for placement in safety-sensitive positions will be required to submit to a pre-employment drug test.\nKey Responsibilities:\nDesign mechanical hardware for trapped-ion quantum computing systems, including cryogenic, UHV/XHV, and/or optical subsystems\nSupport the design of ion-trap packages, cryogenic assemblies, vacuum-compatible structures, thermal interfaces, optical alignment features and precision optical subassemblies\nDevelop designs that manage parasitic heat loads, thermal contraction, CTE mismatch, mechanical stability, vibration sensitivity, vacuum compatibility, and assembly tolerances.\nDesign prototype hardware and de-risk test fixtures that lab engineers can build and operate to validate new materials, interfaces, and subsystem concepts.\nWork with optical physicists and engineers to design fiber and free-space optical systems with extremely high tolerances, mechanical stability, thermal/environmental stability, and exceptional optical performance\nDesign complex fiber optic interconnect assemblies, connectors, routing structures, and mechanical interfaces that meet stringent optical alignment, stability, packaging, and reliability requirements.\nSupport test planning for new materials, adhesives, thermal interfaces, coatings, cryogenic assemblies, and vacuum-compatible components.\nWork with lab engineers to evaluate outgassing, cryogenic thermal performance, mechanical stability, alignment repeatability, and failure modes.\nPerform mechanical, thermal, and tolerance analyses to guide design decisions.\nGenerate CAD models, drawings, assemblies, interface definitions, and design documentation.\nPartner with vacuum, cryogenic, optical, electrical, trap fabrication, and system engineering teams to identify interface risks and develop practical solutions.\nCommunicate design trades, assumptions, risks, test results, and recommendations to technical teams and program leadership.\nYou Must Have:\nBachelor’s degree minimum\nMinimum of 5+ years (Masters and PhD inclusive) of hands-on mechanical design experience with complex hardware systems.\nDue to Contractual requirements, must be a U.S. Person. defined as, U.S. citizen permanent resident or green card holder, workers granted asylum or refugee status \nDue to national security requirements imposed by the U.S. Government, candidates for this position must not be a People's Republic of China national or Russian national unless the candidate is also a U.S. citizen.\nWe Value:\nAdvanced degree in mechanical engineering, aerospace engineering, applied physics, materials science, or a related technical field preferred\nStrong written and verbal communication skills, including clear documentation of design intent, risks, assumptions, and recommendations.\nExperience with cryogenic systems, UHV vacuum systems, lasers and precision optics, AMO physics experiments, trapped-ion systems, or semiconductor packaging.\nExperience designing mechanical components or assemblies requiring precision tolerancing, thermal management, and structural stability.\nProficiency with 3D CAD tools and mechanical drawing release practices.\nDemonstrated ability to design hardware that can be fabricated, inspected, assembled, tested, and iterated.\nAbility to use analysis, test data, and engineering judgment to make mechanical design decisions.\nExperience with material selection for vacuum, cryogenic, low-magnetic environments\nExperience with thermal modeling, parasitic heat-load estimation, FEA, tolerance analysis, modal analysis, or structural analysis.\nExperience designing test fixtures, prototype assemblies, or validation experiments for complex mechanical systems.\nExperience with GD&T, vendor management, machined parts, and design-for-assembly practices.\nExperience with vacuum cleanliness practices, bake-compatible design, leak checking, outgassing tests, RGA data, or cryogenic contamination control.\nStrong organizational skills and ability to manage multiple design and de-risking efforts in parallel.","description_format":"text","description_chars":4645,"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":true,"languages":[{"language":"Russian","level":"All levels","optional":false}]},"benefits":[],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Quantum Science & Computing","Quantum Computing Hardware"],"lifecycle":[{"event":"open","at":"2026-10-27T19:52:44Z"}],"visa":[],"liveness":{"score":63,"band":"ok","label":"Likely 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