Commonwealth Fusion Systems

Develops high-temperature superconducting fusion magnets

Lead Technician, Mechanical Assembly Testing

Inspection & TestUpdated on Nov 8

Full-timeDevens, MA, USA$36 - $41 /hr

About the Job

Requirements

A high school diploma is required.
At least five years of hands-on mechanical testing experience, particularly pneumatic pressure proofing and helium leak detection using mass spectrometers, is required.
Experience leading small- to medium-sized crews of technicians performing complex mechanical or testing activities is required.
Experience with high-vacuum hardware is required, including proficiency in plumbing temporary test fixtures and making connections using KF, CF, VCR, compression fittings, and NPT.
Familiarity with setting up and connecting vacuum systems, including turbomolecular pumps and leak detectors, is required.
Mid-level proficiency with Microsoft or Google productivity software is required.
Ability to occasionally lift up to 50 pounds is required.
Ability to stoop, climb, type, stand, or sit for extended periods is required.
Ability to work in a facility with industrial hazards, including heat, cold, noise, fumes, strong magnets, lead, high voltage, high current, pressure systems, and cryogenics, is required.
Willingness to travel or occasionally work nights, weekends, or on-call is required.

Responsibilities

Execute complex field testing procedures, primarily mechanical testing such as pneumatic pressure proofing and leak detection using a helium leak detector.
Execute test procedures under the direction of the Manager of Assembly Testing.
Provide technicians with guidance and instruction as a front-line supervisor to facilitate safe, effective, and efficient work.
Proactively identify issues and potential issues, ensure accurate submission to work and quality management systems, and help drive issues to successful resolution.
Complete all test documentation accurately and on time.
Coach technicians to embody CFS behaviors and guiding principles in their interactions.
Represent the SASY Test team in collaboration with CFS cross-functional teams as required.
Ensure activities meet CFS safety policies and applicable regulatory safety standards.

Desired Qualifications

Formal training of at least 40 hours or active progress toward an ASNT Level II NDT certification in Leak Testing.
Direct experience with leak-testing methods such as tracer probe, hood technique, and helium-filled object techniques.
Prior experience in fusion-relevant, aerospace, or semiconductor cleanroom environments.
Experience with low- or high-voltage electrical testing.

Salary Range: 36 to 41 (Currency: USD) (Pay period: per-hour-wage)

About Commonwealth Fusion Systems:

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. And we're working with policymakers, suppliers, and many others to build the energy industry of the future.

We’re in the best position to make it happen. Since 2018, we’ve raised $4 billion of capital, making us the largest and leading fusion company in the world.

Now we’re looking for more thinkers, doers, builders, and makers to join us. People who’ll bring new perspectives, solve tough problems, and thrive as part of a team.

If that’s you and this role fits, we want to hear from you.

Join the power movement as a Lead Technician, Mechanical Assembly Testing

The Mechanical Commissioning Field Lead is responsible for leading a small team (2-3 technicians) in the execution of SASY testing activities under the direction the Manger of Assembly Testing with guidance and support from Test Engineering. These activities may also include assembly activities, as testing will take place in parallel with SPARC assembly. The lead technician will have daily hands-on responsibilities

What you'll do:

Execute complex testing procedures in the field with a primary focus on mechanical testing to include pneumatic pressure proofing and leak detection using helium leak detector.
Work under the direction of Manager, Assembly Testing, to execute test procedures
Serve as front line supervisor for test technicians by providing guidance and instruction to technicians to facilitate safe, effective, and efficient execution of work
Identify issues and potential issues pro-actively, ensure accurate submission to our work and quality management systems and assist to drive issues to successful conclusions
Ensure completion of all test documentation in an accurate and timely fashion
Coach technicians to embody the CFS behaviors and guiding principles in all interactions
Represent the SASY Test team in collaboration with all CFS cross-functional teams as required
Adhere to the highest standards of safety and ensure that activities taking place are being performed in accordance with CFS safety policies and applicable regulatory safety standards

What we’re looking for:

HS Diploma
Minimum 5 years of hands-on mechanical testing experience, with a heavy focus on pneumatic pressure proofing and helium leak detection using mass spectrometers.
Proven experience leading small to medium-sized crews of technicians performing complex mechanical or testing activities.
Demonstrated experience with high-vacuum hardware: Must be proficient in plumbing temporary test fixtures and making connections using KF, CF, VCR, compression fittings, and NPT.
Familiarity with setting up and connecting vacuum systems, including turbomolecular pumps and leak detectors.
Mid-level proficiency in with Microsoft or Google productivity software

Bonus points for:

Formal training (40+ hours) or active progression toward an ASNT Level II NDT certification in Leak Testing.

Direct experience with specific leak testing methodologies (e.g., tracer probe, hood technique, and helium-filled object techniques).

Prior experience working in fusion-relevant, aerospace, or semiconductor cleanroom environments.

Experience with low or high voltage electrical testing

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

#LI-Onsite

#CFS-NE

At CFS, we excel in fast-paced environments, driven by our values of integrity, execution, impact, and self-critique. As we grow, we’re eager to bring on mission-driven folks who offer diverse perspectives and fresh ways to tackle challenges.

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.

About the Company

Commonwealth Fusion Systems

Develops high-temperature superconducting fusion magnets

Commonwealth Fusion Systems builds fusion energy systems that aim to provide clean, affordable power. It designs tokamaks using high-temperature superconducting magnets to make smaller, less expensive machines. Its flagship SPARC is intended to produce net energy, with ARC envisioned as the first commercial fusion power plant. The company collaborates with MIT and focuses on a data-driven, mission-focused path to scalable fusion energy for large energy users.

Company size: 1,001-5,000
Company stage: Grant
Total funding: $4B
Headquarters: Harvard, MA
Founded: 2018

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