Firefly Aerospace
Spacecraft GNC Engineer III
Cedar Park, TX · Full-time · Posted Oct 20, 2026
- Experience
- 4-8 years of professional experience in spacecraft guidance, navigation, and control, or related technical discipline.
- Education
- Bachelor's degree in aerospace engineering, mechanical engineering, electrical engineering, physics, mathematics, computer science, or related 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 required authorizations from the U.S. Department of State.
About the job
Designs, analyzes, tests, and operates spacecraft guidance, navigation, and control systems, software, and simulations across mission phases.
What you'll do
- Develop and validate GNC software, algorithms, and simulation models; analyze nominal and off-nominal flight scenarios.
- Conduct stability and sensitivity analyses, hardware-in-the-loop testing, and spacecraft hardware integration.
- Support spacecraft operations as a GNC console operator and perform post-mission analysis and technical documentation.
What they ask for
- Bachelor's degree in a listed or related field.
- 4-8 years of professional experience in spacecraft GNC or a related technical discipline.
- Advanced knowledge of spacecraft orbital mechanics, dynamics, state estimation, attitude dynamics, and sensor modeling; experience developing high-fidelity sensor and actuator models.
- Proficiency in a spacecraft GNC specialization, hardware-in-the-loop testing, Python, C++, and software engineering practices.
Nice to have
- Advanced degree with a GNC focus; experience supporting spacecraft GNC through development, integration, and mission operations.
- Experience with embedded or real-time C++, flight software frameworks, real-time operating systems, CI/CD, Linux, or spacecraft commissioning.
Tools
Python, C++, CI/CD, Linux
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