Principal GNC Engineer

Reflect Orbital

$150K — $180K *
Aerospace & Defense
8 - 10 years of experience
Job Overview by Ladders

Qualifications

  • 10+ years of GNC engineering experience, preferably on spacecraft or dynamically controlled vehicles.
  • Ownership of a GNC subsystem with proven flight experience, encompassing simulation, algorithms, and software.
  • Strong foundation in modeling physical systems from first principles, particularly in flexible body dynamics.
  • Expertise in attitude and orbit determination state estimation validated in flight.
  • Experience with HITL testing for GNC flight software verification and validation.
  • Background in guidance, maneuver, and constellation design, covering orbit selection and station-keeping.
  • Proficient in Python, C++, and/or Rust.

Responsibilities

  • Develop innovative solutions for targeting reflected sunlight from space to a specific ground spot.
  • Design and test closed-loop guidance, navigation, and control for both attitude and orbit.
  • Plan trajectories and attitude profiles to meet specific spot serving requirements.
  • Create and manage a 6-DOF simulation of vehicle dynamics to analyze performance through Monte Carlo methods.
  • Implement GNC algorithms in flight software (C++/Rust) and validate through avionics testing.
  • Collaborate with avionics teams on sensor and actuator choices for reliable attitude control.
  • Analyze orbits and design constellations to optimize spot serving capabilities.

Benefits

  • 100% coverage of base medical, dental, and vision policies for employees.
  • Access to Health Savings Accounts (HSA), Flexible Spending Accounts (FSA), and a 401K plan.
  • Unlimited paid time off, promoting work-life balance.
  • Daily provision of healthy lunches for all employees.
Full Job Description
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 our avionics. We're looking for someone who brings "full-stack" GNC development capability to the table.

Responsibilities
  • Come up with creative solutions to the unique problems that come with precisely putting a spot of reflected sunlight on the ground from space.
  • Design, develop and test our closed-loop guidance, navigation and control for both attitude and orbit.
  • Plan trajectories and attitude motion profiles that satisfy our spot serving constraints.
  • Develop and own our 6-DOF simulation of vehicle attitude and orbital dynamics, and use it to characterize vehicle performance through Monte Carlo analysis.
  • Write GNC algorithms in flight software (C++/Rust) and validate them using our avionics in the loop.
  • Drive sensor and actuator selection with our avionics engineers so attitude determination and control are reliable in flight.
  • Analyze and plan orbits and constellation design to maximize our 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 the simulation, the algorithms and the 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 the above qualifications, we are likely still interested in hearing from you. Hiring exceptional individuals is our #1 priority, and we believe that exceptional people often have highly unusual backgrounds.

We are also interested in carving out unique roles for unconventional people that we are excited about working with.

Benefits

Reflect Orbital's success will hinge on our team, which is why our compensation and benefits plan is designed to reward our employees and support their families as generously as we're able.
  • Broad choice of medical/dental/vision coverage, Reflect covers 100% of each base-policy
  • Access to HSA, FSA, and 401K
  • Unlimited paid time off
  • Healthy lunches provided daily

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