GNC Engineer

At OKSI, we believe in owning problems end to end - from first concept through final delivery. We see it through! If you're looking for a place where you can take real ownership, stretch your skills, a place to grow your career while owning meaningful, mission-driven work, this is where you belong.

OKSI is seeking a Guidance, Navigation, and Control (GNC) Engineer to design, develop, and validate GNC algorithms, flight software, and control systems for spacecraft and/or aerial vehicle platforms. The successful candidate will work across the full engineering lifecycle - from algorithm design and simulation through hardware integration, test, and on-orbit or flight operations - collaborating closely with cross-functional engineering teams, program management, and internal and external stakeholders.

• Design and develop GNC algorithms for attitude determination and control, orbit determination and control, and precision pointing
• Design flight software, algorithms, and simulation products, and support spacecraft autonomy tools for constellation management
• Develop GNC software modules and interfaces in collaboration with software engineers, ensuring seamless integration with overall vehicle systems
• Implement designed flight control algorithms onto flight control system hardware

• Conduct spacecraft/vehicle dynamics analysis and perform simulations to evaluate system performance, stability, and accuracy
• Perform trade studies and recommend optimal GNC configurations, weighing factors such as power, mass, and cost
• Run hardware-in-the-loop (HIL), software-in-the-loop (SIL), and Monte Carlo simulations, including iron-bird analysis where applicable
• Define fault detection and response strategies for GNC subsystems

• Select GNC components and lead GNC subsystem design, including reaction wheels, thrusters, magnetic torquers, IMUs, star trackers, and gyroscopes
• Develop blended attitude solutions from multiple sensor data sources
• Collaborate with spacecraft, payload, and avionics engineers to define system requirements and ensure GNC compatibility and integration

• Develop and execute test plans and procedures for GNC systems, including system-level testing, performance evaluation, and anomaly resolution
• Support subscale-to-full-scale test and flight test activities, including travel to support flight test operations as needed
• Analyze telemetry data to diagnose and troubleshoot GNC-related anomalies and performance issues
• Support on-orbit or in-flight operations and anomaly resolution
• Support internal and external design reviews
• Work with department leads and program managers to plan and maintain schedules, milestones, and technical status reporting
• Coordinate with distributed engineering teams across multiple sites
• Assist in development of technical proposals and project estimates, and help resolve technical and engineering conflicts
• Stay current on industry advancements and emerging technologies in GNC systems, contributing to continuous improvement initiatives

• Bachelor's degree in Aerospace Engineering, Electrical Engineering, or a related engineering discipline (or equivalent combination of education, training, and experience)
• 2+ years of professional experience in GNC/ADCS, spacecraft dynamics, flight testing, or a related discipline
• Strong knowledge of spacecraft/vehicle dynamics, orbital mechanics, and control theory
• Proficiency in relevant programming and analysis tools (e.g., C/C++, MATLAB, Python), including numerical simulation and analysis
• Familiarity with GNC hardware and software components: sensors (gyroscopes, accelerometers, star trackers), actuators, and control algorithms
• Experience with simulation tools commonly used in GNC engineering (e.g., MATLAB/Simulink, STK)
• Prior experience directly interfacing with aerospace customers in the commercial or government sectors

• Master's or PhD in a related engineering field
• Active DoD Secret Security Clearance, or ability to obtain and maintain one
• Hands-on experience with IMUs, reaction wheels, star trackers, gyroscopes, and other GNC hardware
• Experience with rendezvous, proximity operations, and docking (RPOD) design and operations
• Demonstrated experience developing, implementing, and verifying flight software
• Knowledge of industry standards and protocols for GNC systems, such as CCSDS, ECSS, and GPS/GNSS
• Experience with autopilot,…