GNCOrbitControlsEngineer

Xona is the navigational intelligence company bringing real-time, centimeter-level certainty to any device, anywhere on Earth. With Pulsar – the world’s most advanced PNT satellite infrastructure in Low Earth Orbit – Xona will offer a future-proof, backwards-compatible global positioning system optimized for absolute precision, superior power, and robust protection. We're looking for a GNC Orbit Controls Engineer to design and implement the algorithms and onboard software that handle orbit determination, guidance, maneuver execution, and post-maneuver analysis to deliver safe, efficient, and highly automated station-keeping and disposal. We’re building the software that keeps our spacecraft exactly where they need to be.   WHAT YOU’LL DO - Develop open-loop and closed-loop controllers for altitude management, station-keeping, and end-of-life disposal - Implement and maintain onboard orbit propagators, select and validate integrators, and ensure numerical consistency with ground truth - Build orbit determination pipelines using EKF with GNSS - Design burns and long-arc trajectories, and optimize delta V and timelines under comm visibility, power and thermal, and operations constraints - Coordinate burn pointing and wheel momentum strategy with ADCS - Maintain numerically consistent MATLAB and C++ simulators, create Monte Carlo campaigns, run SIL and HIL tests, and perform post-maneuver reconstruction   REQUIRED QUALIFICATIONS - You are familiar with orbital mechanics and simulation and have had exposure with onboard propagators with perturbation models and integrators on flight targets - You have GNC software experience in C++ and MATLAB for analysis, modeling, and test-vector generation - You have supported real maneuvers and can reconcile plan versus truth with post-burn estimation - You are comfortable at the ADCS and propulsion interface for burn pointing and momentum management   DESIRED QUALIFICATIONS - B.S. or M.S. in Aerospace Engineering, Control Systems, Ap