{"id":3227556,"url":"https://alion.io/job/firefly-aerospace-propulsion-engineer-iiiii-alpha-engines","title":"Propulsion Engineer II/III - Alpha Engines","company":{"id":63753,"name":"Firefly Aerospace","domain":"fireflyspace.com","url":"https://alion.io/company/firefly-aerospace-com","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workday","truth_index":null},"role":"Aerospace","role_family":"Aerospace","seniority":"middle","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Briggs, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":85000,"max_usd":166000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":162},"experience_years_min":7,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"GD&T","optional":false},{"name":"MATLAB","optional":false},{"name":"Python","optional":false},{"name":"Siemens NX","optional":false}],"status":"live","first_seen_at":"2026-10-23T00:00:00Z","employer_posted_date":"2026-10-23","last_verified_at":"2026-11-01T06:43:33Z","board_verified":true,"closed_at":null,"days_open":9,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":9},"description":"ABOUT FIREFLY AEROSPACE\nFirefly Aerospace is a space and defense technology company that enables our world to launch, land, and operate in space - anywhere, anytime. As the partner of choice for critical space missions, Firefly is the only commercial company to launch a satellite to orbit with 24-hour notice and the only company to achieve a successful Moon landing. Our launch vehicles, lunar landers, and orbital vehicles provide government and commercial customers with full mission services from low Earth orbit to the Moon and beyond. Headquartered in north Austin, Texas, Firefly is looking for passionate, hardworking innovators to join our team and help fuel our successful trajectory into space.\nAbout the Role\nThe Alpha Engines team is responsible for the design, integration, and operation of the Reaver and Lightning engines that power the first and second stages of Firefly’s Alpha launch vehicle.\nAs a Responsible Engineer, you will own engine hardware across its full lifecycle - requirements definition, design, analysis, development, test, qualification, and flight. You will lead the design and analysis of the hardware, collaborate with fabrication and integration teams to manufacture and assemble the system, and support vehicle testing and launch operations. You will serve as a subject matter expert for the Alpha Engines team and provide an active voice in engine development, test campaigns, and launch operations.\nThis role requires deep technical knowledge, extreme ownership of hardware from concept to flight, and clear communication with cross-functional partners including propulsion, structures, avionics, and vehicle systems. The successful candidate will be a self-starter who enjoys challenging assumptions, thrives in a fast-paced development environment, and seeks to make impactful contributions to Firefly’s mission.\nResponsibilities\nDemonstrate full ownership of launch vehicle engine hardware through the full product life cycle\nLead the design and analysis of engine components and assemblies to meet performance, reliability, manufacturability, and operability requirements\nDrive component and system analyses including fluid, structural, thermal, and dynamic\nCollaborate with manufacturing and integration teams to develop processes, work instructions, and test procedures\nPlan, coordinate, and execute development, qualification, and acceptance testing of flight hardware, including data analysis and reviews\nDevelop tools for design, analysis, and test data review\nAuthor and present design review, test readiness, launch readiness, and data review presentations to internal and external stakeholders\nIdentify system-level risks, perform trade studies, and drive decisions based on technical merit, risk, cost, schedule, and quality to ensure successful engine and vehicle operation\nServe as the propulsion representative for your hardware during engine testing, stage testing, and launch operations\nQualifications\nRequired\nB.S. in Mechanical, Aerospace, or a related engineering discipline\nLevel II: 3+ years of experience developing launch vehicle propulsion systems. Level III: 7+ years of experience developing launch vehicle propulsion systems.\nStrong understanding of engineering fundamentals especially fluid dynamics, thermodynamics, heat transfer, and solid mechanics\nDemonstrated history of applying engineering first principles to arrive at simple, robust solutions\nProven experience with strong hardware ownership through multiple aspects of the product lifecycle\nHands-on experience with hardware design, fabrication, and testing\nExperience with CAD and configuration management tools (Siemens NX and Teamcenter preferred), and comprehension of GD&T, tolerancing, and ASME Y14.5\nFamiliarity with Python, MATLAB, LabVIEW, GFSSP, or other control, data acquisition, and reduction software\nWorking knowledge of manufacturing, fabrication, integration, and quality control relevant to fluid components\nExcellent problem-solving, communication, and technical writing skills\nProven ability to rapidly develop solutions with partially defined or evolving requirements\nDesired Qualifications\nAdvanced degree in Mechanical Engineering, Aerospace Engineering, or an equivalent field\n5+ years of experience developing launch vehicle propulsion systems\nDemonstrated experience of full hardware lifecycle ownership, from blank-sheet design through full operation\nStrong understanding in engineering fundamentals of propulsion systems and combustion devices\nIn-depth knowledge of cryogenic, high-pressure, or high-temperature system operations and compatible material selection\nExperience with fluid system subcomponent or pressurized component development, design, or testing\nExperience testing or operating complex engineering systems\nExperience with data acquisition systems and test instrumentation including pressure transducers, thermocouples, RTDs, flow meters, load cells, and accelerometers\nExperience optimizing design of hardware for improvements in reliability, manufacturability, performance, cost, and simplicity\nFirefly offers outstanding benefits for our employees, including generous health, dental and vision plans with low plan deductibles, parental leave, relocation benefits, educational reimbursement, short term disability, and flexible PTO options.\nTo conform to U.S. Government space technology export regulations, including the International Traffic in Arms Regulations (ITAR) you must be a U.S. citizen, lawful permanent resident of the U.S., protected individual as defined by 8 U.S.C. 1324b(a)(3), or eligible to obtain the required authorizations from the U.S. Department of State.\nFirefly Aerospace, Inc. is an Equal Opportunity Employer; employment with Firefly is governed based on merit, competence and qualifications and will not be influenced in any manner by race, color, religion, gender, national origin/ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability or any other legally protected status.","description_format":"text","description_chars":6062,"description_truncated":false,"requirements":{"experience_years_min":7,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":true,"languages":[]},"benefits":["Parental leave"],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":true,"industries":["Space & Aerospace"],"lifecycle":[{"event":"open","at":"2026-10-25T06:26:11Z"}],"visa":[],"liveness":{"score":27,"band":"fade","label":"Fading","p_open":1,"p_active":0.6,"p_room":0.45,"age_days":9,"expected_fill_days":5,"reasons":["conf:11","velocity","win:tail","comp:brand"],"computed_at":"2026-11-01T06:10:25Z"},"pay":null,"html_url":"https://alion.io/job/firefly-aerospace-propulsion-engineer-iiiii-alpha-engines","json_url":"https://alion.io/job/firefly-aerospace-propulsion-engineer-iiiii-alpha-engines.json","meta":{"generated_at":"2026-11-01T11:54:19Z","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":18418,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-02T00:00:00Z"}},"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":63753},"rest":"https://alion.io/mcp/rest/get_company?id=63753"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Ffirefly-aerospace-propulsion-engineer-iiiii-alpha-engines"},{"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%2Ffirefly-aerospace-propulsion-engineer-iiiii-alpha-engines"},{"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%2Ffirefly-aerospace-propulsion-engineer-iiiii-alpha-engines"},{"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/firefly-aerospace-propulsion-engineer-iiiii-alpha-engines\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Ffirefly-aerospace-propulsion-engineer-iiiii-alpha-engines"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":3227556}},{"tool":"search_jobs","arguments":{"company":"fireflyspace.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":3227556},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); 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