Firefly Aerospace
GNC Engineer II, Hypersonics
Cedar Park, TX · Full-time · Posted Oct 20, 2026
- Experience
- 2–5 years of professional experience; no alternatives stated.
- Education
- Bachelor’s degree in aerospace engineering, mechanical engineering, electrical engineering, physics, mathematics, computer science, or a related technical field.
- 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 the required authorizations from the U.S. Department of State.
About the job
Designs, simulates, tests, and integrates guidance, navigation, and control systems for hypersonic and high-speed atmospheric flight vehicles.
What you'll do
- Develop and validate GNC algorithms, vehicle models, and trajectory analyses, including 6DOF simulations and Monte Carlo studies.
- Support SIL, PIL, and HIL integration and testing, and analyze ground and flight-test data to assess performance and refine models.
- Collaborate across vehicle engineering teams from development through testing and flight operations.
What they ask for
- Bachelor’s degree in a listed or related technical field.
- 2–5 years of professional experience in GNC, flight dynamics, trajectory analysis, or a closely related discipline.
- Experience with aerospace-vehicle GNC and 3DOF and/or 6DOF simulation, Monte Carlo analysis, uncertainty propagation, and performance assessment.
- Proficiency with Python, MATLAB/Simulink, or similar tools; familiarity with C/C++ and software development practices.
Nice to have
- Master’s or PhD in a related field emphasizing GNC, flight dynamics, optimization, or autonomous systems.
- Direct hypersonic GNC experience or experience with trajectory optimization, modern control, navigation/state estimation, or hardware-in-the-loop integration.
Tools
Python, MATLAB/Simulink, C/C++, Git, SIL, PIL, HIL, GPS/GNSS
Model-written summary · the original posting is authoritative