Senior Control Electronics Engineer

About the role

Why Castelion, Why Now Castelion is moving incredibly fast to develop and deliver advanced defense systems at a time when execution matters more than ever. We believe focus and technical excellence are decisive advantages - and we are building a team that can deliver real capability, not just concepts. This is a rare opportunity to join at an early stage, where your work will directly shape critical systems, influence major technical decisions, and have immediate, real-world impact.

Responsibilities

• Design and develop real-time control electronics for flight-critical systems, including TVC controllers and attitude control system (ACS) driver electronics
• Lead the architecture and implementation of actuator control systems, including motor drivers, valve drivers, and associated feedback/control loops
• Develop high-reliability analog and mixed-signal circuits for precision control, sensing, and actuation
• Work closely with GNC, avionics, and flight software teams to ensure seamless integration of control electronics with vehicle systems
• Perform circuit-level and system-level modeling and analysis to validate performance, stability, and robustness under dynamic flight conditions
• Support hardware bring-up, integration, and test campaigns, including debugging, root cause analysis, and performance tuning
• Define and execute qualification and flight test plans, translating results into system-level improvements
• Ensure designs meet requirements for thermal performance, EMI/EMC, and operation in extreme environments
• Mentor junior engineers and contribute to best practices in control electronics design
• Partner closely with program leadership to make technical trades aligned with mission success

Qualifications

• Bachelor's, Master's, or PhD in Electrical Engineering or related field
• 5+ years of experience designing and validating control electronics for aerospace, defense, or other high-reliability systems
• Strong background in real-time control systems, actuator electronics, and feedback control implementation in hardware
• Experience designing motor drivers, valve drivers, or similar high-performance actuator control electronics
• Proficiency in analog and mixed-signal circuit design, simulation, and analysis (e.g., SPICE, MATLAB/Simulink, or equivalent)
• Experience with hardware bring-up, integration, and troubleshooting in a lab or flight hardware environment
• Familiarity with EMI/EMC design practices, ruggedized electronics, and operation in high-vibration/high-temperature environments
• Strong problem-solving mindset, thriving in a fast-paced, hardware-rich, high flight cadence environment
• Ability to obtain and maintain a U.S. government–issued security clearance; U.S. citizenship required

Benefits

• Meaningful