Principal GNC Engineer Verified today

Reflect Orbital · Hawthorne, CA · Space Systems · first seen 2026-09-03

About the Role

As a Principal GNC Engineer you will directly shape the in-orbit performance of a novel space vehicle. Your work will span vehicle-level dynamics and control, orbit propagation, flight software and HITL testing on avionics. You will bring full-stack GNC development capability to the team.

Responsibilities

  • Design, develop and test closed-loop guidance, navigation and control for both attitude and orbit
  • Come up with creative solutions to the unique problems that come with precisely putting a spot of reflected sunlight on the ground from space
  • Plan trajectories and attitude motion profiles that satisfy spot serving constraints
  • Develop and own the 6-DOF simulation of vehicle attitude and orbital dynamics, and use it to characterize performance through Monte Carlo analysis
  • Write GNC algorithms in flight software (C++/Rust) and validate them using avionics in the loop
  • Drive sensor and actuator selection with avionics engineers to ensure reliable attitude determination and control in flight
  • Analyze and plan orbits and constellation design to maximize overall spot serving capability

Ideal Qualifications

  • 10+ years of professional GNC engineering experience, ideally on spacecraft or other dynamically controlled vehicles
  • Clear technical ownership of a GNC subsystem that has flown, covering simulation, algorithms and flight software
  • Strong background in modeling physical systems from first principles, including flexible body dynamics, sensors, actuators and the space environment
  • Expertise in state estimation design for attitude and orbit determination, validated in flight
  • Ability to verify and validate GNC flight software in an integrated environment using HITL testing
  • Experience in guidance, maneuver and constellation design, including orbit selection, coverage and station-keeping
  • Experience in real-time spacecraft operations support, from commissioning through console operations to on-orbit anomaly resolution
  • Fluency in Python, C++ and/or Rust

Even if you don't meet 100% of these qualifications, we encourage you to apply. We prioritize hiring exceptional individuals and are open to carving out unique roles for unconventional people we are excited to work with.

Benefits

  • Broad choice of medical, dental and vision coverage; Reflect covers 100% of each base policy
  • Access to HSA, FSA and 401K
  • Unlimited paid time off
  • Healthy lunches provided daily