Avionics Reliability Engineer Torrance, CA Avionics

Castelion is moving incredibly fast to develop and deliver advanced defense systems at a time when execution matters more than ever. We believe focus, ownership, and excellence are decisive advantages - and we're building a world-class team to turn bold ideas into real capability.

This is a rare opportunity to join at an early stage, where you'll have significant ownership, collaborate with exceptional teammates, and make a direct, measurable impact on our mission and the future of the company - regardless of your function.

We are hiring an Avionics Reliability Engineer to own environmental qualification and reliability validation across our avionics hardware. This role is responsible for developing and executing reliability test strategies, including HALT/HASS campaigns, and driving hardware improvement through deep failure analysis and cross-functional collaboration. This position is ideal for engineers who want hands-on ownership of environmental testing infrastructure and reliability processes while working closely with avionics design and manufacturing teams to rapidly mature flight hardware.

• Develop reliability validation strategies for avionics hardware, including environmental and stress testing methodologies
• Design and execute HALT/HASS campaigns to identify failure modes and accelerate hardware maturation
• Specify, procure, and commission environmental test equipment and chambers
• Oversee and conduct environmental testing, including vibration, thermal cycling, and stress screening
• Perform live troubleshooting and root-cause analysis on hardware under test
• Translate test findings into actionable design improvements and engineering change orders (ECOs)
• Partner with avionics design engineers to improve robustness and manufacturability
• Support manufacturing by developing and implementing screening procedures, authoring and verifying acceptance test procedures, and establishing reliability best practices to ensure product compliance and long-term performance.
• Create and maintain clear documentation of test procedures, results, and reliability metrics
• Drive continuous improvement of reliability processes and test infrastructure

• Bachelors degree in electrical engineering, mechanical engineering, or related field
• Hands-on experience with environmental or reliability testing of electronic hardware
• Experience troubleshooting complex hardware systems in a lab environment
• Familiarity with standard lab instrumentation and data acquisition
• Strong understanding of failure analysis and root-cause methodologies
• Ability to work across design, test, and manufacturing teams

• Experience developing or running HALT/HASS or other accelerated life testing programs
• Familiarity with environmental chambers (thermal, vibration, combined stress)
• Experience with avionics, aerospace, automotive, or other high-reliability hardware
• Background in reliability engineering, qualification testing, or validation engineering
• Experience writing test automation or analysis scripts (Python or similar)
• Knowledge of industry reliability standards and qualification practices

Castelion offers a generous benefits package. Please refer to the bottom of our Careers page for more details.

Please note this job description is not designed to cover or contain a comprehensive listing of activities, duties or responsibilities that are required of the employee for this job. Duties, responsibilities and activities may change at any time with or without notice.

This position may require access to classified information or restricted U.S. Government sites, systems, or information, as determined by the Company and/or…