Firefly Aerospace
Propulsion Engineer I (Spacecraft Engine Team)
Cedar Park, TX · Full-time · Posted Oct 22, 2026
- Experience
- 3+ years required; 5+ years of progressive experience in a related engineering discipline desired.
- Education
- BS in Aerospace Engineering or related engineering discipline; Master’s Degree in Mechanical, Aerospace, or related engineering discipline desired.
- Visa sponsorship
- 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 required authorizations from the U.S. Department of State, to comply with U.S. Government space technology export regulations including ITAR.
About the job
Develop and support spacecraft propulsion hardware and fluid systems, from design and analysis through manufacturing, testing, and flight operations.
What you'll do
- Serve as responsible engineer for in-space propulsion hardware and as a primary contact for spacecraft fluid-system design, analysis, and operations.
- Develop and improve propulsion designs, manufacturing and test processes, and automation and test-data analysis tools.
- Own hardware testing and support flight operations, risk assessments, and design-for-manufacturability changes.
What they ask for
- BS in Aerospace Engineering or a related engineering discipline.
- 3+ years of experience working on an aerospace engine or fluid system.
- Strong fundamentals in fluids, thermodynamics, and mechanics; experience with Siemens NX or equivalent CAD program.
- Comprehension of design fundamentals including tolerancing, ASME Standards, ASTM, and GD&T.
Nice to have
- Master’s Degree in Mechanical, Aerospace, or related engineering discipline; 5+ years of progressive experience in a related engineering discipline.
- Experience with storable liquid propulsion (NTO/MMH, Hydrazine), technical reviews or investigations, and hands-on test integration.
Tools
Siemens NX, ASME Standards, ASTM, GD&T, NTO/MMH, Hydrazine
Model-written summary · the original posting is authoritative