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.

Test Specialist – Environmental Lab

We are seeking a hands-on Test Specialist – Environmental Lab to support the development, qualification, acceptance, and production testing of flight hardware. This role will operate in a fast-paced test environment where careful preparation, disciplined execution, and rapid problem-solving are essential to delivering reliable flight and mission systems.

The Test Specialist – Environmental Lab will work directly with test engineers, design engineers, technicians, manufacturing personnel, and quality teams to configure and execute vibration, shock, and modal tests. The ideal candidate is comfortable working with complex test equipment, mechanical fixtures, instrumentation, and data acquisition systems—and is motivated by solving difficult problems with limited precedent.

Responsibilities

Perform acceptance test procedures and qualification test procedures on aerospace and defense hardware.
Program and operate electrodynamic shakers, vibration controllers, shock systems, modal test equipment, and associated data acquisition systems.
Execute sine, random vibration, sine burst, shock, modal survey, resonance search, and other dynamic test profiles.
Verify test article configuration, fixture interfaces, sensor orientation, cable routing, calibration status, and test setup documentation.
Monitor test execution in real time, including control response, cross-axis motion, fixture behavior, response limits, and abort criteria.
Review time histories, frequency spectra, power spectral density plots, transmissibility, and frequency-response data for anomalies.
Maintain complete and accurate test records, including setup photographs, calibration data, channel lists, configuration data, deviations, and results.
Participate in 5S, safety, tooling, process-improvement, and laboratory-efficiency initiatives.
Maintain a clean, organized, and safe test area in accordance with company and facility requirements.
Work closely with cross-functional teams to meet demanding test schedules and program milestones.

Basic Qualifications

High school diploma or equivalent.
Two or more years of experience in aerospace, defense, aviation, automotive, manufacturing, laboratory testing, or a related technical environment.
Hands-on experience operating test equipment, mechanical systems, instrumentation, or data acquisition systems.
Ability to read engineering drawings, work instructions, schematics, test procedures, and equipment documentation.
Ability to use common hand tools and calibrated torque tools.
Strong attention to detail and commitment to following approved procedures.
Ability to troubleshoot problems systematically and communicate findings clearly.
Ability to work effectively in a team-based, schedule-driven environment.
Ability to lift, handle, and position test hardware and equipment in accordance with applicable safety procedures.
Knowledge of and ability to use PPE, when required.

Preferred Skills and Experience

Aerospace, automotive, defense or other high-reliability hardware testing
Environmental testing: MIL-STD-810H tests including vibration, thermal-vacuum, thermal cycling, shock, salt fog, and sand and dust
Experience using accelerometers, strain gauges, load cells, force transducers, thermocouples and signal-conditioning equipment.
Ability to identify process improvements, and make suggestions to engineers to improve workflow
Familiarity of acceptance, qualification and development test campaigns.