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.
Senior Control Electronics Engineer We are seeking a Senior Control Electronics Engineer to design and deliver real-time electronic control systems for Castelion's long-range hypersonic strike vehicles. This role is critical to enabling precise actuation and vehicle control through robust, high-performance electronics. 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 (TVC) systems and attitude control system (ACS) drivers in a fast-paced, hardware-driven environment.
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
Requirements
- 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 long-term equity
- Four (4) weeks of paid time off
- Ten (10) company-paid holidays
- Comprehensive health benefits – 100% employee-covered medical and strong dependent coverage, plus dental and vision plans
- Paid parental leave
- $100 monthly fitness stipend
- Onsite EV charging
- Catered meals, company-covered food during high-demand periods, fully stocked kitchen