Guidance, Navigation & Control (GNC) Systems Engineer | Remote Opportunity | Fastwater Staffing

📍 Location: Sainte-Anne-de-Bellevue, QC, Canada 📄 Employment Type: Full-Time 🏢 Work Arrangement: Remote Opportunity 🚀 Start Date: TBD 💰 Compensation: TBD — based on skills and experience Important Screening Requirements Must have a B.Sc. in Electrical Engineering, Aerospace Engineering, Physics, or a related field . 10+ years of GNC/AOCS experience on LEO, MEO, or GEO satellite platforms. Strong experience in orbital mechanics, attitude dynamics, and control-law design . Experience implementing real-time filtering and control algorithms in embedded code . Hands-on experience with navigation sensors and actuators . Strong aerospace systems engineering background. Experience supporting systems integration, testing, and troubleshooting . Experience with Confluence and JIRA . Ability to work independently with limited supervision. Excellent written and verbal communication skills in an English and French work environment . About the Role We are seeking a senior Guidance, Navigation & Control (GNC) Systems Engineer to support the design, integration, verification, and operational support of GNC subsystems for current and next-generation remote sensing and communications satellites . This role spans the complete GNC subsystem lifecycle—from algorithm development and hardware implementation through integration, verification, and on-orbit operational support. The ideal candidate brings deep expertise in orbital dynamics, attitude determination and control, navigation, and real-time flight software integration , while being comfortable working closely with subsystem and mission operations teams throughout the spacecraft lifecycle. What We're Looking For We’re looking for a senior GNC/AOCS systems engineer who can work across the full spacecraft lifecycle and bridge GNC algorithms, spacecraft hardware, flight software, systems engineering, integration, verification, and mission operations. The ideal candidate goes beyond analysis and simulation, with hands-on experience translating GNC concepts into integrated spacecraft systems and supporting those systems through testing and on-orbit operations. Key Responsibilities Architecture & Requirements Derive GNC functional, performance, and safety requirements from mission-level requirements. Define requirements related to pointing accuracy, slew rates, orbit-maintenance ΔV, and fault tolerance. Develop and maintain System Requirements, Interface Control Documents (ICDs), and system description documentation . Manage requirements and maintain bidirectional traceability throughout the project lifecycle. Modeling & Trade Studies Conduct trade studies involving navigation sensor suites and actuator families. Perform high-fidelity spacecraft dynamics simulations using MATLAB/Simulink and STK . Develop and maintain error budgets. Analyze control-law stability, fuel consumption, and survivability margins. Evaluate GNC architectures and design alternatives. …