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Commonwealth Fusion Systems is seeking a Principal RF Systems Engineer to lead the design and integration of the RF (radiofrequency) power plant for SPARC, their flagship fusion demonstration reactor. The SPARC tokamak requires >25MW of 120MHz RF power to heat plasma to 100 million Kelvin and sustain fusion reactions.
In this principal-level role, you will serve as a highly influential technical architect responsible for the high-level direction of the RF systems while remaining deeply hands-on. Your responsibilities include:
- Architecting and integrating high-power electronics, solid-state RF amplification systems, and complex transmission networks
- Driving technical decisions that ensure the SPARC RF plant achieves net energy gain
- Collaborating across engineering disciplines to optimize RF delivery and plasma heating efficiency
- Mentoring and guiding engineering teams on RF systems design and implementation
- Contributing to the technical strategy for scaling RF systems to commercial fusion power plants
This is a unique opportunity to work on one of the most ambitious energy projects globally. Commonwealth Fusion Systems has raised $4 billion since 2018 and is the world's largest and leading private fusion company. You'll be part of a team solving critical challenges in fusion energy commercialization, working alongside world-class researchers and engineers.
The role is based in Devens, MA, where CFS operates its primary engineering and manufacturing facilities. You'll have access to cutting-edge laboratory equipment and collaborate with physicists, materials scientists, and systems engineers across the organization.
