Castelion · 5 months ago
Senior Avionics Test Engineer
Torrance, California, United States
Full-time
Onsite
Mid, Senior Level
4+ years expCastelion is bringing a new approach to defense development and production, focusing on short, iterative design cycles and rapid testing. They are seeking a Senior Avionics Test Engineer to own the validation and performance characterization of control actuation systems for flight vehicles.
AerospaceGovernmentManufacturingMilitaryNational Security
No H1B
U.S. Citizen Only
Responsibilities
Develop and execute comprehensive actuator test plans across component, subassembly, and integrated system levels
Build test fixtures, HIL environments, and automated test rigs to simulate flight conditions and actuator load profiles
Validate performance metrics such as torque, response time, bandwidth, power draw, and thermal behavior under nominal and fault scenarios
Instrument and log actuator tests for precise characterization and traceability
Lead root-cause investigations for performance anomalies or test failures
Collaborate with mechanical and control systems teams to refine actuator designs based on test results and failure data
Drive qualification testing and environmental testing campaigns (vibe, thermal, EMI) for flight hardware
Qualification
Required
B.S. or M.S. in Mechanical, Mechatronics, Aerospace, or Electrical Engineering
4+ years of experience testing actuators, servos, or motion control systems for aerospace, automotive, robotics, or defense applications
Strong hands-on experience designing and running test setups involving motors, load cells, encoders, and motion control loops
Familiarity with embedded control systems and communication protocols (CAN, RS-422/485, SPI, Ethernet, Automotive Ethernet)
Proficient in using instrumentation and data acquisition systems (e.g., Python, C++, Protobuffs, custom scripts)
Demonstrated ability to work independently and lead multi-disciplinary integration efforts
Preferred
Experience with high-force/high-precision actuator systems (e.g., TVC, flight control surfaces, robotic manipulators)
Exposure to flight-like test environments, including environmental stress screening (ESS)
Experience with fault injection, failure mode testing, and reliability qualification for mission-critical systems
Working knowledge of C/C++ or Python for custom test tooling or embedded systems debugging
Background supporting flight test or launch operations
Benefits
Long-term stock incentives
Comprehensive medical, vision, and dental insurance
Four weeks of paid time off per year
Company
Castelion
Castelion is a defense tech company that applies modern hardware development and manufacturing processes to national security challenges.
51-200 employees
Funding
Current Stage
Growth StageTotal Funding
$469.61MKey Investors
Lightspeed Venture PartnersSilicon Valley BankAndreessen Horowitz
2025-12-05Series B· $350M
2025-01-29Series A· $70M
2025-01-29Debt Financing· $30M
Leadership Team
Bryon Hargis
Founder // CEO
Andrew Kreitz
Co-Founder and CFO
Recent News
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