{"id":3029402,"url":"https://alion.io/job/clearspace-spacecraft-thermal-architect","title":"Spacecraft Thermal Architect","company":{"id":176591,"name":"ClearSpace","domain":"clearspace.today","url":"https://alion.io/company/clearspace","size_band":"501-1000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"BambooHR","truth_index":{"grade":"B","score":84,"open_postings":7,"ghost_share":0,"stale_share":0.429,"repost_share":0,"time_to_fill_p50_days":73,"computed_at":"2026-11-01T06:10:25Z"}},"role":"Aerospace","role_family":"Aerospace","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":["London, United Kingdom"],"countries":["GB"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":104000,"max_usd":209000,"period":"year","method":"global_role_cell_scaled_by_country","sample_n":96},"experience_years_min":10,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"ECSS","optional":false}],"status":"live","first_seen_at":"2026-09-17T00:00:00Z","employer_posted_date":"2026-09-17","last_verified_at":"2026-11-01T21:14:05Z","board_verified":true,"closed_at":null,"days_open":45,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":45},"description":"At ClearSpace, we believe in reusability, in affordability driving disruption, and that no progress is real unless it is sustainable.\nOur company was founded in 2018 out of the realization that in-orbit servicing and space debris removal are vital services for the future of space exploration and operations. Today ClearSpace has assembled an expert engineering team and is leading the way toward sustainable space operations. From a garage in Switzerland, we now operate across UK and Europe, and are working with world-leading institutions and companies to bring our dream of a sustainable space ecosystem to life.\nWe are looking for a Spacecraft Thermal Architect to join our team !\nThe Role\nThe successful candidate will be a key member of the Mechanical, Thermal and Propulsion (MTP) team and will act as the technical authority for the spacecraft thermal design. The Thermal Architect will own the spacecraft thermal architecture, define thermal control strategies and drive thermal design decisions across all mission phases.\nThere is also an opportunity for the right candidate to act as the lead coordinator for the Mechanical, Thermal, and Propulsion domains on the mission, ensuring coherent spacecraft design solutions.\nKey responsibilities\nOwn the spacecraft thermal architecture throughout the mission lifecycle.\nDefine and justify the overall thermal control strategy for the spacecraft and payloads.\nLead thermal design trade-offs involving passive and active thermal control solutions.\nDefine thermal requirements and allocation to subsystems and equipment.\nDevelop and maintain spacecraft thermal budgets and thermal design margins.\nLead spacecraft thermal modelling activities and ensure model correlation throughout development.\nDefine thermal hardware architecture including MLI, coatings, heaters, radiators, heat pipes, thermal straps and temperature sensing systems.\nCoordinate thermal analyses for all mission phases.\nWork closely with mechanical, propulsion, avionics and systems engineers to ensure coherent spacecraft design solutions.\nDefine thermal verification strategies and support qualification and acceptance testing activities.\nSupport design reviews by providing thermal design rationale and demonstrating compliance with mission requirements.\nAssess thermal impacts of configuration changes, non-conformances and anomalies.\nAct as the primary technical point of contact for thermal architecture matters with customers, suppliers and partners.\nMentor thermal engineers and contribute to development of thermal engineering standards and best practices.\nMust Have\n10+ years of experience in spacecraft thermal engineering.\nProven experience as lead thermal engineer, principal thermal engineer or thermal architect on spacecraft developments.\nStrong expertise in spacecraft thermal control systems and thermal analysis methodologies.\nExtensive experience with spacecraft thermal mathematical models and correlation activities.\nProficiency in thermal analysis software and CAD tools, especially ESATAN-TMS.\nDeep knowledge of passive and active thermal control technologies.\nExperience defining thermal requirements, budgets and system-level thermal trades.\nExperience supporting thermal vacuum testing and environmental verification campaigns.\nFamiliarity with ECSS thermal engineering standards.\nStrong analytical and problem-solving capabilities.\nExcellent communication and stakeholder management skills.\nAbility to lead technical discussions and defend architectural decisions.\nNice to have\nMSc or PhD in Aerospace Engineering, Thermal Engineering, Mechanical Engineering, Physics or similar.\nExperience across LEO, MEO and GEO missions.\nFamiliarity with launch vehicle thermal environments.\nLeadership and mentoring experience.\nExperience working directly with ESA or other institutional customers.\nInformation about our data processing is set out in our candidate data privacy notice.","description_format":"text","description_chars":3924,"description_truncated":false,"requirements":{"experience_years_min":10,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"master","optional":false},"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Space Services"],"lifecycle":[{"event":"open","at":"2026-10-21T19:59:35Z"}],"visa":[{"country":"GB","licensed_sponsor":true,"evidence":"Licensed UK visa sponsor (Senior or Specialist Worker, Skilled Worker)","filings_12m":null,"filings_prev_12m":null,"green_card_filings_12m":null,"median_offered_wage_usd":null,"route":"Global Business Mobility: Senior or Specialist Worker; 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