Avionics Reliability Engineer

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, 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. Avionics Reliability Engineer 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. Responsibilities • 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 Basic Qualifications • 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 Preferred Skills and Experience • 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. Other Duties 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. Additional Eligibility Requirements This position may require access to classified information or restricted U.S. Government sites, systems, or information, as determined by the Company and/or applicable U.S. Government requirements. If the position is so designated, your employment in the role may be contingent upon your ability to obtain and maintain the required U.S. Government security clearance or other government authorization, and to satisfy any citizenship or other eligibility requirements imposed by applicable law, regulation, executive order, or government contract requirements. You will be notified if and when such requirements apply. Affirmative Action/EEO Statement Castelion is an Equal Opportunity Employer. We are committed to providing equal employment opportunities to all applicants and employees without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, genetic information, protected veteran status, or any other characteristic protected by applicable federal, state, or local law. Castelion is committed to providing reasonable accommodations to qualified individuals with disabilities throughout the application and hiring process. If you require a reasonable accommodation to complete an application, participate in the interview process, or otherwise participate in the hiring process, please contact hr@castelion.com. Requests for accommodation will be considered on an individual basis and handled in accordance with applicable law. Castelion is committed to fostering a workplace where employment decisions are based on qualifications, business needs, and the ability to perform the essential functions of the role, with or without reasonable accommodation. EAR/ITAR Requirements This position requires access to export-controlled information, and as such, employment (or hiring of a contractor) is contingent upon the candidate’s ability to access all applicable export-controlled information without additional export licensing being required by the Bureau of Industry and Security and/or the Directorate of Defense Trade Controls.