Senior Gnc Engineer

Position Summary: We're looking for an experienced Senior Guidance, Navigation & Control (GNC) Engineer to take ownership of the analysis that makes our spacecraft fly. You'll drive high-fidelity simulation, performance evaluation, and system-level analysis of GNC systems—and roll up your sleeves to shape flight software in C++.From large deployable structures and laser communications to high-precision astrophysics observations, in-space robotics, constellations, and rendezvous & proximity operations, you'll get your hands on the full spectrum of cutting-edge spacecraft missions. Your analysis will directly steer Systems Engineering on mission design and CONOPS, along with the actuator and sensor performance requirements that define what's possible. Proficiency in C++ and Python is essential—you'll help build and maintain the modeling, simulation, and analysis tool stack that we use to design these missions. This is a remote-friendly role, open to US-based candidates. Primary Duties & Responsibilities Build high-fidelity models and simulations of spacecraft GNC systems and prove them out across every mission phase Conduct Monte Carlo analyses, covariance studies, and performance assessments to validate GNC algorithms before they fly Create and evolve the simulation and analysis tools we use to design missions and flight software components that implement them Analyze sensor and actuator performance, including propulsion subsystems, star trackers, IMUs, reaction wheels, and GNSSWrite and refine C++ flight software GNC components and flight software configuration Support verification and validation of flight software through unit testing and hardware-in-the-loop (HIL) simulations Collaborate with systems engineering, mission design, and flight software teams to ensure GNC performance meets mission requirements Document analysis results, software interfaces, and validation procedures

Physical Demands: This position requires the ability to lift and move objects weighing up to 20 Lbs. Occasional standing, walking, bending, and reaching may be required.

Export Statement: This position requires access to export-controlled commodities, technical data, technology, software, and services. U.S. citizenship, U.S. legal permanent resident status, or protected person status under 22 CFR §120.15 and 8 U.S.C. § 1324b(a)(3) is required.