Firefly Aerospace
Propulsion Engineer II/III - Alpha Engines
Briggs, TX · Full-time · Posted Oct 23, 2026
- Experience
- Level II: 3+ years developing launch vehicle propulsion systems. Level III: 7+ years. Desired: 5+ years developing launch vehicle propulsion systems.
- Education
- B.S. in Mechanical, Aerospace, or a related engineering discipline; an advanced degree in Mechanical Engineering, Aerospace Engineering, or an equivalent field is desired.
- Visa sponsorship
- Must be a U.S. citizen, lawful permanent resident, protected individual as defined by 8 U.S.C. 1324b(a)(3), or eligible to obtain required U.S. Department of State authorizations under U.S. Government space technology export regulations, including ITAR.
About the job
Own Alpha launch vehicle engine hardware across its lifecycle, from requirements and design through testing, qualification, and flight operations.
What you'll do
- Lead design, analysis, and lifecycle ownership of engine components and assemblies.
- Plan and execute development, qualification, and acceptance tests; analyze results and present reviews.
- Coordinate with manufacturing and integration teams and represent propulsion hardware during engine, stage, and launch operations.
What they ask for
- B.S. in Mechanical, Aerospace, or a related engineering discipline.
- Level II: 3+ years developing launch vehicle propulsion systems; Level III: 7+ years.
- Strong engineering fundamentals, including fluid dynamics, thermodynamics, heat transfer, and solid mechanics.
- Hands-on hardware design, fabrication, and testing experience; experience with CAD and configuration management tools, GD&T, tolerancing, and ASME Y14.5.
Nice to have
- Siemens NX and Teamcenter.
- Advanced degree in Mechanical Engineering, Aerospace Engineering, or an equivalent field; experience with Python, MATLAB, LabVIEW, GFSSP, or other control, data acquisition, and reduction software.
Tools
Siemens NX, Teamcenter, Python, MATLAB, LabVIEW, GFSSP, ASME Y14.5
Model-written summary · the original posting is authoritative