Principal RF Systems Engineer
Commonwealth Fusion Systems · Devens, Massachusetts · $150k–225k
Posted 6 August 2026 · Full-time · Electrical Engineering · via Lever
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Join the power movement as a Principal RF Systems 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 a Principal RF Systems Engineer to play a pivotal role in building the most powerful RF plant in the world.
At this level, you are a highly influential architect of the system. You will help drive the high-level technical direction while remaining deeply hands-on, taking a central role in the integration of high-power electronics, solid-state amplification, and complex transmission networks to ensure SPARC achieves net energy.
For more information on the SPARC RF plant, see the SPARC journal papers here: