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Mechanical Test Technician

Job in Cambridge, Middlesex County, Massachusetts, 02140, USA
Listing for: Commonwealth Fusion Systems LLC
Contract position
Listed on 2026-06-06
Job specializations:
  • Engineering
    Mechanical Engineer, Electronics Technician
Salary/Wage Range or Industry Benchmark: 38 - 49 USD Hourly USD 38.00 49.00 HOUR
Job Description & How to Apply Below
Position: Mechanical Test Technician - Contract

Contract Mechanical Test Technician

We are seeking an experienced Mechanical Test Technician to support assembly and testing activities for the SPARC components under the SATP program.

What you’ll do:
  • Helium Leak Detection:
    Perform advanced leak testing using tracer probe, hood, and helium‑filled object techniques.
  • Pressure Testing:
    Execute pneumatic pressure proofing protocols according to safety and engineering standards.
  • Vacuum System Integration:
    Set up, connect, and operate turbomolecular pumps and mass spectrometer leak detectors (MSLD).
  • Hardware

    Competency:

    Proficently handle and install various vacuum and fluid connections, specifically KF, CF, VCR, compression fittings, and NPT.
What we’re looking for:
  • 3+ years experience in a lead or senior technical role involving complex mechanical assembly.
  • Minimum 40 hours of formal classroom training in NDT/Leak Testing; ideally currently certified or eligible for ASNT Level II in Leak Testing (LT).
  • Proven experience troubleshooting vacuum system integrity and managing system‑wide leak detection protocols.
  • Familiarity with the hardware used in fusion‑relevant or high‑vacuum environments.
  • Demonstrated experience working around high‑hazard environments (vacuum forces, high pressure, and cryogenics).
Must‑have requirements:
  • Ability to occasionally lift up to 50 lbs.
  • Perform activities such as stooping, climbing, typing, standing, or sitting for extended periods of time.
  • Work in a facility that contains industrial hazards including heat, cold, noise, fumes, strong magnets, lead (Pb), high voltage, high current, pressure systems, and cryogenics.
  • Willingness to travel or work required nights/weekends/on‑call occasionally.

$38 - $49 an hour. This is a contract position.

We value diversity deeply and are proud to be an equal opportunity employer by choice. We consider all qualified applicants equally, regardless of race, color, national origin, ancestry, citizenship status, protected veteran status, religion, physical or mental disability, marital status, sex, sexual orientation, gender identity or expression, age, or any other basis protected by law.

This role requires compliance with U.S. laws concerning the export of controlled or protected technologies or information (collectively, “Export Control Laws”). Any offer of employment will be contingent on the need for compliance with such Export Control Laws.

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