Environmental Test Technician IV

Please Note: To conform with the United States Government Space Technology Export Regulations, the applicant must be a U.S. citizen, lawful permanent resident of the U.S., conditional resident, asylee or refugee (protected individuals as defined by 8 U.S.C. 1324b(a)(3)), or eligible to obtain the required authorizations from the U.S. Department of State.

At Cesium Astro
, we are developers and pioneers of out-of-the-box communication systems for satellites, UAVs, launch vehicles, and other space and airborne platforms. We take pride in our dynamic and cross-functional work environment, which allows us to learn, develop, and engage across our organization. If you are looking for hands‑on, interactive, and autonomous work, Cesium Astro is the place for you. We are actively seeking passionate, collaborative, energetic, and forward‑thinking individuals to join our team.

Cesium Astro is seeking an Environmental Test Technician IV to support vibration, thermal, humidity, and thermal shock environmental testing activities within our Environmental Test Lab. In this hands‑on role, you will serve as the primary technical expert for all ESS operations, ensuring safe, accurate, and compliant execution of environmental testing for flight and engineering hardware.

You will own the day‑to‑day operation of thermal chambers, 3‑axis vibration tables, thermal shock systems, and humidity test equipment. Responsibilities include helping schedule and execute tests, documenting results, maintaining lab equipment, troubleshooting basic issues, and working closely with engineering teams to ensure hardware is ready for testing.

This position is ideal for an experienced technician with deep environmental test experience who enjoys working directly with engineers, defining and improving lab processes, training technicians, and helping expand our environmental screening capabilities for high‑reliability aerospace hardware.

• Support day‑to‑day planning, scheduling, and execution of all environmental testing, including vibration (random, sine, sine‑on‑random, gunfire), thermal cycling, thermal shock, humidity, and vibe‑under‑temperature testing.
• Interpret and execute test procedures, MIL‑STD and DO‑160 requirements, and internal specifications to ensure full environmental compliance.
• Set up and operate environmental test systems including 3‑axis shakers, thermal chambers, humidity chambers, and thermal shock equipment.
• Build and run thermal and vibration profiles; collaborate with engineers to design and review vibration fixtures and mounting hardware.
• Process, review, and analyze vibration and thermal data using Excel, PDF reporting, and internal systems.
• Assist in diagnosing and troubleshoot test anomalies, equipment issues, and environmental system failures to minimize downtime and improve repeatability.
• Support lab equipment health, including preventative maintenance, calibration tracking, repair scheduling, upgrade scoping, and documentation.
• Maintain lab organization and safety standards, including ESD controls, tool/equipment upkeep, and consumables tracking.
• Provide guidance and mentor technicians and engineers in test procedures, equipment operation, lab safety, and environmental test best practices.
• Collaborate with product, design, and quality engineering teams to resolve issues, improve test methods, and ensure successful hardware test campaigns.
• Contribute to the development and delivery of training modules covering environmental equipment use, environmental test methodology, and lab safety protocols.

• 5+ years of experience performing environmental testing or environmental testing in aerospace, defense, or other high‑reliability hardware environments.
• High school diploma or equivalent (technical certificate or associate degree preferred).
• Extensive hands‑on experience operating and maintaining vibration tables, thermal chambers, humidity chambers, and thermal shock systems.
• Demonstrated ability to interpret environmental test procedures, engineering drawings, and MIL‑STD/DO‑160 requirements.
• Strong troubleshooting skills across thermal, vibration, and…