Commonwealth Fusion Systems
Lead Technician, Assembly Testing
Devens, MA · On-site · Full-time · Posted Aug 26, 2026
- Experience
- Minimum 5 years of hands-on mechanical testing experience.
- Education
- High school diploma.
- Visa sponsorship
- Offers are contingent on compliance with U.S. Export Control Laws.
About the job
Leads a small technician crew in field assembly testing, primarily mechanical testing such as pneumatic pressure proofing and helium leak detection.
What you'll do
- Execute test procedures and provide hands-on support for mechanical testing and related assembly activities.
- Guide technicians, promote safe and efficient work, and identify and help resolve issues.
- Ensure test documentation is completed accurately and represent the test team across CFS.
What they ask for
- High school diploma.
- At least 5 years of hands-on mechanical testing experience, focused on pneumatic pressure proofing and helium leak detection using mass spectrometers.
- Experience leading technician crews performing complex mechanical or testing activities.
- Proficiency with high-vacuum hardware and temporary test fixtures, including KF, CF, VCR, compression fittings, and NPT; familiarity with turbomolecular pumps and leak detectors.
Nice to have
- Formal training of 40+ hours or active progression toward ASNT Level II NDT certification in Leak Testing; experience with tracer probe, hood technique, or helium-filled object techniques.
- Experience in fusion-relevant, aerospace, or semiconductor cleanroom environments, or with low- or high-voltage electrical testing.
Pay
USD 36–41 per-hour-wage
Tools
helium leak detector, mass spectrometers, KF, CF, VCR, NPT, turbomolecular pumps, Microsoft or Google productivity software
Model-written summary · the original posting is authoritative