{"id":662632,"url":"https://alion.io/job/xonaspace-gnc-engineer-advanced-modeling","title":"GNC Engineer, Advanced Modeling","company":{"id":685097,"name":"Xona Space Systems","domain":"xonaspace.com","url":"https://alion.io/company/xonaspace","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":{"grade":"A","score":90,"open_postings":15,"ghost_share":0,"stale_share":0.2,"repost_share":0,"time_to_fill_p50_days":84,"computed_at":"2026-10-26T05:57:25Z"}},"role":"Aerospace","role_family":"Aerospace","seniority":null,"employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Burlingame, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":170000,"max":200000,"currency":"USD","period":"year","gross":null,"usd_annual":200000},"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"C++","optional":false},{"name":"CI/CD","optional":false},{"name":"Digital Twin","optional":false},{"name":"Git","optional":false},{"name":"Linux","optional":false},{"name":"MATLAB","optional":false},{"name":"Simulink","optional":false}],"status":"live","first_seen_at":"2026-07-27T22:22:20Z","employer_posted_date":"2026-07-27","last_verified_at":"2026-10-26T21:50:03Z","board_verified":true,"closed_at":null,"days_open":91,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":91},"description":"Xona is the navigational intelligence company bringing real-time, centimeter-level certainty to any device, anywhere on Earth.\nWith Pulsar - the world’s most advanced PNT satellite infrastructure in Low Earth Orbit - Xona will offer a future-proof, backwards-compatible global positioning system optimized for absolute precision, superior power, and robust protection.\nOverview\nWe are seeking a GNC Engineer specializing in advanced modeling to develop high-fidelity simulation and analysis capabilities for aerospace vehicle guidance, navigation, and control systems. You will build nonlinear six-degree-of-freedom simulation environments, develop flexible-body and vehicle subsystem models, and validate those models using analytical, test, and flight data.\nYou will collaborate with GNC, structural, and test engineers to ensure simulation models accurately represent vehicle dynamics and hardware behavior throughout the development lifecycle.\nWhat You’ll Do\nDevelop, maintain, and validate high-fidelity nonlinear six-degree-of-freedom digital twin of the spacecraft bus for design, analysis, and verification.\n\nDevelop flexible-body and structural-dynamics models for integration into vehicle simulations.\n\nBuild and validate physics-based models of vehicle dynamics, sensors, actuators, environmental disturbances, and other subsystems.\n\nApply system identification techniques to estimate system parameters and improve model fidelity.\n\nDerive linear approximate models from nonlinear systems using numerical and analytical techniques.\n\nDevelop simulation capabilities supporting control design, Monte Carlo analysis, software-in-the-loop, and hardware-in-the-loop testing.\n\nContribute to model-based software development, verification, documentation, and technical reviews.\n\nRequired Qualifications\nExperience developing nonlinear six-degree-of-freedom simulation platforms for aerospace vehicles.\n\nExperience modeling and validating aerospace vehicle dynamics, sensors, actuators, environmental effects, and other vehicle subsystems.\n\nExperience developing or integrating flexible-body and structural-dynamics models.\n\nStrong understanding of rigid-body dynamics, control systems, numerical methods, and linear systems.\n\nExpertise in system identification and deriving linear approximations of nonlinear dynamic systems.\n\nExperience with model-based software development and verification processes.\n\nStrong proficiency in MATLAB, C++, Git, and Linux development environments.\n\nDesired Qualifications\nMaster’s degree or Ph.D. in aerospace engineering, controls, robotics, applied mathematics, or a related field.\n\nExperience developing aerospace vehicle GNC simulations from initial architecture through integrated testing or flight validation.\n\nExperience with MATLAB/Simulink and automatic code-generation workflows.\n\nExperience with modal analysis, or flexible-mode identification.\n\nExperience with software-in-the-loop, or hardware-in-the-loop test environments.\n\nExperience correlating simulation models with component, subsystem, integrated vehicle, or flight-test data.\n\nFamiliarity with Monte Carlo analysis, uncertainty modeling, sensitivity analysis, continuous integration, and automated testing workflows.\n\nFor U.S. Roles: To comply with U.S. Government space technology export regulations, applicant must be a U.S. citizen, lawful permanent resident of the United States (i.e. Green Card holder), or other protected individual as defined by 8 U.S.C. 1324b(a)(3).\nFor U.K. Roles: To comply with U.K. regulations, this role requires Baseline Personnel Security Standard (BPSS) checks, and successful candidates must be eligible to obtain UK Security Clearance (SC).\nFor Canada Roles: Successful candidates must obtain and hold a security clearance at the reliability status level, and pass security assessment for the Canadian Controlled Goods Program (CGP) and ITAR.\nWe celebrate diversity and are committed to creating an inclusive environment for all employees. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or veteran status.","description_format":"text","description_chars":4180,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"master","optional":false},"security_clearance":true,"languages":[]},"benefits":[],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Satellite Navigation","Satellite Manufacturing"],"lifecycle":[{"event":"open","at":"2026-09-10T21:42:52Z"}],"visa":[],"liveness":{"score":29,"band":"fade","label":"Fading","p_open":1,"p_active":0.663,"p_room":0.44,"age_days":90,"expected_fill_days":84,"reasons":["conf:2","win:tail","crowd:"],"computed_at":"2026-10-26T05:57:25Z"},"pay":{"stated_usd_annual":200000,"is_top_pay":true},"html_url":"https://alion.io/job/xonaspace-gnc-engineer-advanced-modeling","json_url":"https://alion.io/job/xonaspace-gnc-engineer-advanced-modeling.json","meta":{"generated_at":"2026-10-27T01:58:26Z","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":1123,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-28T00:00:00Z"}},"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":685097},"rest":"https://alion.io/mcp/rest/get_company?id=685097"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fxonaspace-gnc-engineer-advanced-modeling"},{"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%2Fxonaspace-gnc-engineer-advanced-modeling"},{"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%2Fxonaspace-gnc-engineer-advanced-modeling"},{"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/xonaspace-gnc-engineer-advanced-modeling\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fxonaspace-gnc-engineer-advanced-modeling"}]}