Senior RF Systems Architect - High-Power Fusion & I&C

Fusion Energy Base; Harvard (MA); On-site; USD 150,000 - 225,000; Full time

Benefits offered by this job

Competitive compensation with equity

13 Company-wide Holidays

Flexible vacation days

10 sick days

Generous parental leave policy

Health, dental, and vision insurance

401(k) with employer matching

Professional growth opportunities

Team‑building activities

Job summary

Commonwealth Fusion Systems is seeking a Principal RF Systems Engineer to lead end-to-end RF plant architecture for SPARC, integrating high‑power RF systems and solid‑state amplification. You will architect electronics, instrumentation, and control, interfacing with plasma physics and mechanical teams to ensure robust operation.

You will mentor engineers, oversee commissioning, and drive EMI/EMC mitigation in high‑noise environments while traveling as needed.

Qualifications

• BS in Electrical Engineering; MS/PhD preferred for senior level.
• 15+ years in high‑power RF, radar, accelerators, or power electronics.
• Proficient in RF measurement, forward/reflected power, RF arcs.
• Experience in EMI/EMC mitigation for noisy environments.

Responsibilities

• Shape end-to-end RF plant architecture for tokamaks.
• Integrate massive distributed RF systems with solid‑state amps.
• Design advanced RF sensing, measurement circuits, embedded controllers.
• Lead on commissioning, troubleshooting, and mentoring.

Skills

High-power RF systems

System architecture

RF circuit design

Solid-state amplification

Instrumentation & Control

EMI/EMC mitigation

RF measurement & diagnostics

RF/microwave simulation

Embedded digital controllers

Cross-functional collaboration

Troubleshooting

Mentorship

Education

Bachelor’s degree in Electrical Engineering

Master’s or Ph.D. preferred

Tools

Altium

CST/HFSS

Job description

Commonwealth Fusion Systems is seeking a Principal RF Systems Engineer to lead end-to-end RF plant architecture for SPARC, integrating high‑power RF systems and solid‑state amplification. You will architect electronics, instrumentation, and control, interfacing with plasma physics and mechanical teams to ensure robust operation.

You will mentor engineers, oversee commissioning, and drive EMI/EMC mitigation in high‑noise environments while traveling as needed.