Avionics Systems Test Engineer - HIL & RF

Castelion Corporation; Allen (TX); On-site; USD 90,000 - 130,000; Full time

Job summary

Castelion is seeking a Systems Test Engineer in Allen, TX to own test requirements and build end-to-end test infrastructure for avionics hardware and sub-systems.

The role collaborates with controls, software, avionics, and mechanical teams to verify hardware under realistic conditions and drive robust production testing. You will design automated rigs and lead testing campaigns across multiple levels.

Qualifications

• B.S. or M.S. in Mechanical, Mechatronics, Aerospace, or Electrical Engineering.
• Experience 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 suppliers, DMMs, oscilloscopes, switch matrices, network/spectrum analyzers, signal generators, and electronic loads.
• Familiarity with embedded control systems and CAN, RS-422/485, SPI, Ethernet, Automotive Ethernet.
• Proficient in instrumentation and data acquisition (Python, C++, Protobuffs, custom scripts).
• 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 for test conditions and profiles.
• Validate performance metrics such as power consumption, digital communication, RF performance, torque, response time, bandwidth, and thermal/vibe 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

Test automation

Python

C/C++

RF testing

CAN protocol

Data acquisition

Instrumentation

Team collaboration

Education

B.S./M.S. in Mechanical, Mechatronics, Aerospace, or Electrical Engineering

Tools

Power supplies

DMMs

Oscilloscopes

Switch matrices

Network analyzers

Spectrum analyzers

Signal generators

Electronic loads

GUI dashboards/tools

Job description

Castelion is seeking a Systems Test Engineer in Allen, TX to own test requirements and build end-to-end test infrastructure for avionics hardware and sub-systems.

The role collaborates with controls, software, avionics, and mechanical teams to verify hardware under realistic conditions and drive robust production testing. You will design automated rigs and lead testing campaigns across multiple levels.