At Spaceium, we are building spacecraft systems designed to push the boundaries of what's possible in orbit. As a Guidance, Navigation & Control (GNC) Engineer, you will design the algorithms that let our spacecraft know where they are, decide where to go, and get there precisely. You will own estimation, attitude and orbit determination, and control across the full loop — from math on the whiteboard to flight software running on hardware in high-stakes, resource-constrained environments.ResponsibilitiesDesign and implement guidance, navigation, and control algorithms for spacecraft attitude determination and control (ADCS), orbit determination, and maneuver planningDevelop state estimation and sensor fusion (e.G., Kalman/nonlinear filters) fusing IMU, star tracker, sun sensor, GPS, and other sensor dataModel spacecraft dynamics and orbital mechanics, and design controllers (e.G., PID, LQR, robust/adaptive) for pointing, station-keeping, and trajectory trackingBuild high-fidelity simulation environments to validate GNC performance across nominal and off-nominal conditionsImplement and test GNC algorithms in flight software, and support hardware-in-the-loop verificationRun Monte Carlo analyses and closed-loop verification to characterize performance, stability, and marginsCollaborate with software, systems, avionics, and operations engineers to integrate GNC into the full vehicleSupport on-orbit operations, commissioning,



and anomaly resolution for GNC subsystemsBasic QualificationsBachelor's degree in Aerospace, Mechanical, Electrical Engineering, Robotics, Applied Mathematics, or a related fieldStrong foundation in control theory, linear algebra, and dynamicsProgramming experience in Python and/or C/C++Experience with simulation and analysis tools such as MATLAB/Simulink or equivalent Python stacksExperience with version control systems such as GitPreferred SkillsCreative problem solver with robust first-principles thinking, capable of assessing risk and making decisions with limited data.Experience in a nimble, technical engineering role, with a scrappy, entrepreneurial approach to meeting tight time or budget constraints.Hands‑on experience with spacecraft ADCS, orbital mechanics, or trajectory designExperience implementing estimators or controllers in embedded / flight softwareFamiliarity with sensor calibration, sensor fusion, and hardware‑in‑the‑loop testingExperience with real built hardware — student design teams (rocketry, CubeSat, autonomous vehicles), research, or industryExcellent verbal and written communication skills, collaborative team player, and detail‑oriented with a focus on quality.Additional RequirementsExtended hours and weekend work may be required to support critical project and mission milestones.This role requires a physical presence at the Ottawa facility.CompensationSalary: $75,000 – $110,000 CAD per yearEquity: 0.1% – 0.5%#J-18808-Ljbffr

📌 Guidance, Navigation & Control (Gnc) Engineer (Varennes)
🏢 Spaceium
📍 Varennes