Mechanical Test Technician

Responsibilities

• Perform advanced helium leak detection using tracer probe, hood, and helium-filled object techniques
• Execute pneumatic pressure proofing protocols according to safety and engineering standards
• Set up, connect, and operate turbomolecular pumps and mass spectrometer leak detectors (MSLD)
• Handle and install various vacuum and fluid connections, including KF, CF, VCR, compression fittings, and NPT
• Support assembly and testing activities for SPARC components

Requirements

• 3+ years of experience in a lead or senior technical role involving complex mechanical assembly
• Minimum 40 hours of formal classroom training in NDT/Leak Testing
• Proven experience troubleshooting vacuum system integrity and managing leak detection protocols
• Familiarity with hardware used in high-vacuum or fusion-relevant environments
• Demonstrated experience working in high-hazard environments (vacuum forces, high pressure, and cryogenics)
• Ability to lift up to 50 lbs and perform physical activities such as stooping, climbing, and standing for extended periods
• Willingness to work occasional nights, weekends, or on-call shifts

Preferred Qualifications

• ASNT Level II Leak Testing (LT) certification or eligibility

About the Company

Commonwealth Fusion Systems is on a mission to deliver the urgent transition to fusion energy. Combining decades of research, top talent, and new technologies, we’re designing and building commercially viable fusion power plants to build the energy industry of the future.