RF Systems Mechanical Engineer – High-Power Fusion

Lever, Inc.; Harvard (MA); On-site; USD 90,000 - 145,000; Full time

Benefits offered by this job

Equity

Health insurance

Dental insurance

Vision insurance

401(k)

Holidays

Vacation days

Sick days

Parental leave

Team-building activities

Job summary

Commonwealth Fusion Systems in the United States is advancing SPARC RF power systems. We seek a Mechanical Engineer to own the physical design of RF heating infrastructure, from coax lines to cooling plates, and integrate with high-power electronics.

You’ll translate requirements into manufacturing-ready hardware, collaborate with RF and electronics teams, and guide CAD drafts, sheet metal parts, and heat sinks through fabrication and plant integration.

Qualifications

• Bachelor’s degree required in Mechanical Engineering, Physics, or related field.
• 5+ years of hands-on mechanical design in industrial/high-power environments.
• Experience owning mechanical design architectures.
• Experience with structural and thermal analyses.
• Strong 3D CAD and GD&T skills.

Responsibilities

• Design specialized RF Heating plant components working closely with RF Engineers.
• Decompose high-level system requirements into actionable mechanical specifications.
• Collaborate daily with a CAD drafting team and provide guidance to detail, reviews, and releases.
• Partner cross-functionally with RF, electronics, and process engineers.
• Architect thermal management by integrating cooling loops into enclosures and plant systems.
• Develop large sheet metal components, mounting hardware, cold plates, and more.
• Perform structural loads and thermal analyses to validate designs.

Skills

Mechanical design

3D CAD with GD&T

Structural analysis

Thermal analysis

Heat transfer

Cross-functional collaboration

Education

Bachelor’s degree in Mechanical Engineering, Physics, or related field

Tools

Siemens NX

Teamcenter

Job description

Commonwealth Fusion Systems in the United States is advancing SPARC RF power systems. We seek a Mechanical Engineer to own the physical design of RF heating infrastructure, from coax lines to cooling plates, and integrate with high-power electronics.

You’ll translate requirements into manufacturing-ready hardware, collaborate with RF and electronics teams, and guide CAD drafts, sheet metal parts, and heat sinks through fabrication and plant integration.