Senior Control Electronics Engineer

About Castelion

Castelion is bringing a new approach to defense development and production: short, iterative design cycles, rapid testing in development, and modern commercial manufacturing strategies for production at scale. The company is designing, building, and testing next-generation long-range strike weapons systems to give America and its allies a definitive edge and deter future conflicts.

This is an early-stage opportunity where your work will directly shape critical systems, influence major technical decisions, and have immediate real-world impact.

The Opportunity

Castelion is looking for a Senior Control Electronics Engineer to design and deliver real-time electronic control systems for long-range hypersonic strike vehicles. You will work hands-on with multidisciplinary engineering teams to design, build, test, and validate control electronics hardware, with a focus on thrust vector control systems and attitude control system drivers in a high flight cadence, hardware-driven environment.

This role is central to enabling precise actuation and vehicle control. You will architect and implement actuator control systems, develop high-reliability analog and mixed-signal circuits, and work directly with GNC, avionics, and flight software teams to ensure seamless integration of control electronics with vehicle systems.

What You’ll Do

• Design and develop real-time control electronics for flight-critical systems including TVC controllers and ACS driver electronics
• Lead the architecture and implementation of actuator control systems including motor drivers, valve drivers, and associated feedback and 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

You Should Have

• 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 using tools such as 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 and high-temperature environments
• Bachelor’s, Master’s, or PhD in Electrical Engineering or a related field
• U.S. citizenship required; ability to obtain and maintain a U.S. security clearance

Compensation and Benefits

Meaningful long-term equity for all full-time employees. Benefits include comprehensive medical coverage (100% employee-covered, strong dependent coverage), dental and vision plans; paid parental leave; four weeks of paid time off; ten company-paid holidays; $100 monthly fitness stipend; catered meals and a fully stocked kitchen; and onsite EV charging.