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# Senior Development Test Engineer - Mechanisms

- **Company:** Castelion Corporation
- **Location:** Torrance, CA, United States
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Automation of Tests, Configuration Management, Software Documentation, Encodings, Software Debugging, Hardware-In-The-Loop Simulation, Python (Programming Language), Rapid Prototyping Process, Requirements Management, Software Engineering, System Testing, Systems Integration, Data Logging, Hardware Testing, Build Management, Data Management
- **Published:** November 11, 2026
- **Apply:** https://www.careerbuilder.com/job-details/senior-development-test-engineer-mechanisms-torrance-ca--e6bc12d5-feef-4471-86a6-f585a32d21e5

## About the Role

Test Plan/Schedule, Test Plan/Schedule, Testing, Analysis Skills, Test Design, Manufacturing Operations, Automation Systems, Requirements Management, Software Development, System Test, * Bachelor's degree in Mechanical, Electrical, Aerospace, or related engineering field

 * 5+ years of experience developing, integrating, or testing mechanical, electromechanical hardware
 * Experience with test instrumentation and lab equipment (DAQs, oscilloscopes, power supplies, sensors)
 * Experience with common sensors like load cells, pressure transducers, LVDTs, encoders
 * Strong debugging, troubleshooting, and root-cause analysis skills
 * Comfortable working across disciplines in high-ownership environments
 * Willingness to support extended hours, weekends, travel, and on-site operations during critical test campaigns
 * Comfortable working in fast-moving environments where hardware is the source of truth
 * Environmental testing: vibration, thermal-vacuum, thermal cycling, shock

Preferred Skills and Experience

 * Aerospace, automotive, defense or other high-reliability hardware testing
 * Flight test, range operations, or hardware-in-the-loop (HIL) experience
 * Familiarity with requirements verification, qualification evidence, and failure tracking
 * Hands-on machining, wiring, soldering, or rapid prototyping experience

What We Value

 * Hands-on rigor: deep understanding of systems through direct testing and failure analysis.
 * Autonomy and ownership: you don't wait for direction you seek out what needs to be tested and make it happen.
 * High standards for reliability, data quality, and test repeatability.
 * Systems-level thinking: understanding how actuator behavior affects broader vehicle performance.

## Description

The Senior 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 operations-translating 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.

This is a hands-on role for engineers who thrive in fast-paced, ambiguity-heavy environments and believe the fastest way to learn is to test real hardware.

Responsibilities

 * Translate system and subsystem requirements into test objectives, acceptance criteria, and verification methods
 * Own development and acceptance testing for flight mechanisms for Castelion's hypersonic strike missiles
 * Design and build complex test stands with integrated load actuators and instrumentation
 * 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