Principal Spacecraft Guidance, Navigation & Control Engineer

Who We're Looking For 

Quantum Space is redefining mobility and maneuverability in space. Our high-mobility spacecraft platforms support national security, civil, and commercial missions with unmatched flexibility and propulsion capability. We build fast and iterate quickly. 

We are seeking a Principal Spacecraft Guidance, Navigation & Control Engineer to serve as the technical authority for the GNC subsystem across multiple spacecraft programs, leading architecture, design, procurement, integration, and verification. 

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Where You'll Make an Impact 

• Own the end-to-end GNC/ACS architecture from concept development through flight operations. 
• Own GNC subsystem level requirements. 
• Lead spacecraft attitude and control system design, including actuator sizing, sensor selection, control authority, and momentum management strategy. 
• Define and implement control laws for high-ΔV maneuvering, precision pointing, station-keeping, and proximity operations. 
• Architect state estimation frameworks (EKF/UKF, sensor fusion pipelines, covariance management) for robust on-orbit performance. 
• Develop and maintain high-fidelity 6DOF sp