Senior Avionics Test Engineer — Flight Hardware & RF Testing

Castelion; Los Angeles (CA); On-site; USD 120,000 - 170,000; Full time

Benefits offered by this job

Long-term stock incentives

Comprehensive medical, vision, and eye

Four weeks paid time off per year

Job summary

Castelion is seeking a Senior Avionics Test Engineer to own test requirements, automate test stations, and oversee deployment of test equipment for flight avionics and related subsystems.

You will lead end-to-end test campaigns, develop robust test infrastructure, and collaborate with controls, software, avionics, and mechanical teams to ensure hardware is validated under mission-representative conditions.

Qualifications

• B.S. or M.S. in Mechanical, Mechatronics, Aerospace, or Electrical Engineering.
• 5+ years testing high-power sub-assemblies, high-speed digital interfaces, actuators, motion control systems, and RF sub-assemblies for aerospace, automotive, robotics, or defense applications.
• Hands-on experience designing automated test equipment from the ground up using power supplies, DMMs, oscilloscopes, switch matrices, network/spectrum analysers, signal generators, and electronic loads.
• 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.

Responsibilities

• Develop and execute comprehensive test plans across component, subassembly, and integrated system levels.
• Design & Build test fixtures, HIL environments, and automated test rigs to provide test conditions and automated test profiles.
• Validate performance metrics such as power consumption, digital communication, RF performance, torque, response time, bandwidth, and thermal/vibe behavior under nominal and fault scenarios.
• Instrument and log tests for precise characterization and traceability.
• Lead root-cause investigations for performance anomalies or test failures.
• Collaborate with flight hardware development to refine designs based on test results and failure data.
• Drive qualification testing and environmental testing campaigns (vibe, thermal, EMI) for flight hardware.
• Deploy and prove test equipment designs for components, CCA, and sub-assembly test stations.

Skills

Automated test equipment

Embedded control systems

RF testing

Python

C++

Data acquisition

Test instrumentation

Education

B.S. or M.S. in Mechanical/Mechatronics/Aerospace/Electrical Eng

Tools

Power supplies

DMMs

Oscilloscopes

Switch matrices

Network analysers

Spectrum analysers

Signal generators

Electronic loads

SCPI/VISA/PyVISA

Job description

Castelion is seeking a Senior Avionics Test Engineer to own test requirements, automate test stations, and oversee deployment of test equipment for flight avionics and related subsystems.

You will lead end-to-end test campaigns, develop robust test infrastructure, and collaborate with controls, software, avionics, and mechanical teams to ensure hardware is validated under mission-representative conditions.