Test Development Engineering

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 were building a world-class team to turn bold ideas into real capability.
Development Test Engineer- Mechanisms
The Development Test Engineer owns the planning execution and analysis of tests that turn designs into flight-ready mechanisms. This role sits at the center of engineering manufacturing and operationstranslating requirements into real-world validation through benchtop environmental subsystem and vehicle-level testing. You will design test stands and write automation software to enable rapid testing to drive iterative design.
Own development and acceptance testing for flight mechanisms for Castelions hypersonic strike missiles
Develop automated test software for instrument control test sequencing data logging and analysis; Python is preferred.
Maintain rigorous configuration control data management and test documentation
Improve test infrastructure automation and data quality to increase test cadence and learning velocity
Support flight tests and rocket motor static fires as required
Bachelors degree in Mechanical Electrical Aerospace or related engineering field

• 2 years of experience developing integrating or testing mechanical electromechanical hardware
• Proficiency with test instrumentation and lab equipment (DAQs oscilloscopes power supplies sensors)
• Strong debugging troubleshooting and root-cause analysis skills
• Willingness to support extended hours weekends travel and on-site operations during critical test campaigns
• Aerospace automotive defense or other high-reliability hardware testing

Environmental testing: vibration thermal-vacuum thermal cycling shock
Flight test range operations or hardware-in-the-loop (HIL) experience
Hands-on machining wiring soldering or rapid prototyping experience
Hands-on rigor: deep understanding of systems through direct testing and failure analysis.
High standards for reliability data quality and test repeatability.
Systems-level thinking: understanding how actuator behavior affects broader vehicle performance.
Government sites systems or information as determined by the Company and/or applicable U.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. 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 Requests for accommodation will be considered on an individual basis and handled in accordance with applicable law.
This position requires access to export-controlled information and as such employment (or hiring of a contractor) is contingent upon the candidates 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.