RF Engineer

RF Engineer

Join us in our mission to commercialize fusion energy.

Type One Energy Group is mission-driven to provide sustainable, affordable fusion power to the world. Established in 2019 and venture‑backed in 2023, the company is led by a team of globally recognized fusion scientists with a strong track record of building state‑of‑the‑art stellarator fusion machines, together with veteran business leaders experienced in scaling companies and commercializing energy technologies.

Our Fusion Direct development program pursues the lowest‑risk, shortest‑schedule path to a fusion power plant over the coming decade, using a partner‑intensive and capital‑efficient strategy.

• Location: Knoxville, TN (other office locations may be available)
• Salary: Highly Competitive + Benefits
• Contract: Permanent, full time
• Reporting to: Senior Director of Systems Engineering

We are seeking a motivated RF Engineer to join our Electron Cyclotron Heating (ECH) team and take a central role in the design and development of a quasi‑optical (QO) transmission line system. This hands‑on engineering position lies at the intersection of high‑power microwave engineering, optical beam propagation, and fusion system integration. You will work alongside highly motivated physicists and engineers to design, analyze, and validate the QO transmission line that delivers high‑power millimeter‑wave beams from gyrotron sources to the plasma vessel.

This role offers significant opportunity for growth and requires a willingness to develop expertise across a broad set of microwave and optical engineering disciplines.

• Lead and contribute to the design of QO transmission line components, including wave guides, mirrors, polarize rs, and beam‑shaping elements for high‑power millimeter‑wave delivery.
• Perform Gaussian beam optics analysis and diffraction simulations to characterize beam propagation, spillover losses, and mode purity through the QO transmission line.
• Use electromagnetic simulation tools (e.g., CST, HFSS, COMSOL, or equivalent) to model QO component performance and validate designs against system requirements.
• Specify and coordinate fabrication of precision microwave components, working closely with machinists, vendors, and metrology teams to ensure design tolerances are met.
• Conduct low‑power microwave bench measurements to characterize component performance, including beam pattern mapping, insertion loss, and polarization purity.
• Support high‑power conditioning and commissioning activities for the QO transmission line in coordination with the broader ECH team.
• Develop and maintain engineering documentation including design drawings, analysis reports, interface control documents, and test procedures.
• Stay current with advances in QO and millimeter‑wave engineering and proactively apply new techniques to improve system performance.
• Interact with other engineering and physics disciplines including thermal, mechanical, and neutronics.

• Doctoral degree or Master’s in Electrical Engineering, Physics, Applied Physics, or a closely related field.
• Demonstrated experience in microwave or millimeter‑wave engineering, including RF component design, analysis, or testing.
• Working knowledge of Gaussian beam optics and free‑space wave propagation at millimeter‑wave or sub‑millimeter‑wave frequencies.
• Proficiency with at least one electromagnetic/multi‑physics simulation tool (e.g., CST Microwave Studio, HFSS, COMSOL, or similar).
• Hands‑on experience with microwave measurement techniques and laboratory instrumentation (VNAs, power meters, beam profilers).
• Strong analytical and problem‑solving skills with the ability to translate system‑level requirements into component‑level specifications.
• Genuine curiosity and a demonstrated willingness to learn new technical domains; this role spans multiple disciplines and rewards intellectual breadth.
• Excellent communication skills and ability to collaborate effectively in a multidisciplinary team environment.

• Familiarity with high‑power gyrotron systems or ECH transmission line architectures used in fusion research.
• Experience with QO…