Engineering

As a GNC Engineer at Eclipse Space Technologies Corporation, you'll collaborate on the full guidance, navigation, and control stack for our satellite platforms—from the algorithms running in flight software to the 6DOF simulations validating every mission phase on the ground. This is a broad role by design: you'll work across attitude determination and control, orbital mechanics, and maneuver planning, touching everything from sensor fusion and reaction wheel control laws to closed-loop orbit raise, station keeping, and deorbit sequencing. On a small, high-output team, you won't be handed a narrow slice of a system—you'll help shape the architecture and drive it through to on-orbit performance.

You'll collaborate daily with systems, avionics, software, and mission operations engineers to ensure GNC requirements flow cleanly across the vehicle and that your algorithms are tested, trusted, and ready to fly. You'll build and maintain high-fidelity truth models, run Monte Carlo campaigns to bound uncertainty, and design FDIR logic that keeps the spacecraft safe when things don't go as planned. Hardware-in-the-loop testing, sensor and actuator characterization, and launch and early operations support are all part of the job—this role bridges analysis and execution.

If you're driven by the challenge of keeping a spacecraft precisely pointed and exactly where it needs to be in orbit, and you want to see your work reflected in real telemetry from real satellites, Eclipse is where you'll do the best work of your career. We move fast, iterate hard, and hold our engineering to an exceptionally high standard.

Responsibilities

• Develop, implement, and validate GNC algorithms spanning attitude determination and control, orbit propagation, maneuver planning, and closed-loop trajectory control across all mission phases—from launch through deorbit.
• Build and maintain high-fidelity 6DOF simulations including truth models of vehicle dynamics, sensors, and actuators; run Monte Carlo analyses to verify performance margins and validate CONOPs.
• Design and tune ADCS control laws and state estimation pipelines (attitude determination, orbit determination, GNSS-based navigation) with rigorous attention to pointing accuracy, stability, and agility requirements.
• Define ADCS and GNC hardware requirements; support sensor and actuator selection, sizing, and layout; characterize component performance through analysis and test.
• Develop and execute hardware-in-the-loop test campaigns; support integration and acceptance testing of flight GNC hardware; troubleshoot anomalies and drive them to resolution.
• Author and own FDIR logic, autonomous on-orbit behaviors, and contingency CONOPs; support launch and early operations activities including on-orbit telemetry analysis and algorithm tuning.
• Write production-quality flight and ground software in Rust, C++, and Python; contribute to GNC tooling, test automation, and simulation infrastructure used across the engineering team.

Qualifications

• Bachelor's or Master's degree in Aerospace Engineering, Physics, Mathematics, or a closely related engineering field.
• 3+ years of hands-on spacecraft GNC development experience, with demonstrated ownership of ADCS algorithms, orbital mechanics analysis, or both on flight or near-flight programs.
• Strong command of rotational and translational dynamics, quaternion mathematics, linear and nonlinear control theory, and state estimation techniques.
• Proficiency in one or more GNC modeling and simulation environments such as Sedaro, Basilisk, Simulink, GTK, etc.
• Experience with 6DOF simulation development, hardware-in-the-loop testing, or spacecraft integration and test in an aerospace environment.

Nice to Have

• Cradle-to-grave experience with a 3-axis stabilized spacecraft, including on-orbit operations support and telemetry-driven algorithm refinement.
• Expertise in trajectory optimization, convex optimization, or model predictive control applied to orbit maneuver planning or precision pointing.
• Familiarity with collision avoidance workflows, conjunction assessment, and large-scale constellation maneuver coordination.
• Knowledge of radiation effects on GNC sensors and actuators, or experience with spaceflight qualification standards (NASA-STD, ECSS, GEVS).

Salary: $150k - $225k