{"id":314092,"url":"https://alion.io/job/space-systems-integration-space-gnc-engineer","title":"Space GNC Engineer","company":{"id":16333,"name":"Space Systems Integration","domain":"ssi.space","url":"https://alion.io/company/ssi","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Lever","truth_index":{"grade":"B","score":78,"open_postings":22,"ghost_share":0.364,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":56,"computed_at":"2026-10-28T05:59:10Z"}},"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":["Chantilly, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":180000,"max":230000,"currency":"USD","period":"year","gross":null,"usd_annual":230000},"salary_estimate":null,"experience_years_min":10,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[],"status":"live","first_seen_at":"2026-06-26T13:24:24Z","employer_posted_date":"2026-06-26","last_verified_at":"2026-10-28T16:06:22Z","board_verified":true,"closed_at":null,"days_open":124,"trust":{"level":"ok","repost_count":0,"flags":["company_stale"],"days_open":123},"description":"SSI is seeking a Space GNC Engineer to provide Systems Engineering and Technical Advisory (SETA) support to our customer in Chantilly, VA.\nThis position requires experience with the full lifecycle of design, development, testing and operations of GNC capabilities for spacecraft. This individual will assist the government customer with requirements development, design oversight, trade studies, proposal evaluation, engineering change proposal development/evaluation, hardware procurement oversight, algorithm oversight, integration and test support, and flight operations of highly complex systems.\nSpecific Duties May Include, but Not Limited to the Following:\nPerform independent technical assessments of spacecraft GNC subsystem architectures throughout system design, integration, and test.\nEvaluate contractor designs to ensure compliance with mission requirements, interface specifications, and system performance objectives.\nAssess spacecraft attitude determination and control system designs, including sensor suites, actuator selection, redundancy approaches, and fault management strategies.\nReview guidance, navigation, and control algorithms for technical soundness, implementation maturity, and operational suitability.\nAssess risks, technical maturity, and performance margins across development and operational systems.\nWork closely with operators, system engineers, and contractors to diagnose and resolve test and operational issues.\nEnsure lessons learned from operations are fed back into system improvements.\nAssist in developing customer positions, technical assessments, and decision briefings for leadership.\nRequired Qualifications:\nMust possess an active Top Secret/SCI clearance and CI polygraph (polygraph within the last ten (10) years).\nMaster's degree in engineering and ten (10) or more years of experience.\nDirect experience with space-based ACS subsystems and GNC.\nExperience with all phases of the satellite mission lifecycle, from concept development and design through integration, testing, and post-launch operations.\nExcellent interpersonal, leadership, team building and problem solving skills with a demonstrated ability to be effective in a Government/Contractor team environment.\nAbility to communicate complex technical topics to Senior decision-makers with varying technical backgrounds through clear briefings and written reports.\nWillingness to travel up to 10%.","description_format":"text","description_chars":2410,"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":true,"languages":[]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Space Services","Engineering Services"],"lifecycle":[{"event":"open","at":"2026-09-05T15:58:16Z"}],"visa":[],"liveness":{"score":19,"band":"cold","label":"Long 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