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Cfsenergy

Senior RF Test Engineer

Devens, MA

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hirly's read of this role

Role family
Engineering
Seniority
Senior
Stated salary
$110,000 – $185,000 per year
Country
US
Work mode
On-site / unstated
First seen by hirly
12 Sept 2026

Derived automatically from the posting. Upload your resume above to see how the role scores against it.

the posting

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 Senior RF Test Engineer

SPARC sustains fusion reactions by feeding >25MW of 120MHz RF power into the tokamak to heat the plasma to 100 million Kelvin. We need an RF Test Engineer to play a pivotal role in validating and testing the electronics and control systems that power the most ambitious RF plant in the world.

At this level, you are a hands-on executor and technical problem solver. You will be directly responsible for taking newly architected RF and power electronics from the benchtop to full-scale operation. Your day-to-day will span board-level bring-up, operating high-power RF transmitters, and integrating hardware with software controls to ensure SPARC achieves net energy.

For more information on the SPARC RF plant, see the SPARC journal papers here:

Overview of the SPARC tokamak

Physics basis for the ICRF system of the SPARC tokamak

Original posting on Cfsenergy's site ↗

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Senior RF Test Engineer – Cfsenergy · Devens, MA | hirly.me