Staff Mechanical Engineer, Vacuum & Thermal Systems (R&D)

Cfsenergy; Milpitas (CA); On-site; USD 180,000 - 240,000; Full time

Job summary

Commonwealth Fusion Systems in Milpitas, CA is seeking a Principal Mechanical Engineer to lead end-to-end design of advanced R&D and semiconductor-grade vacuum equipment. You will shape architecture, drive cross-functional collaboration, and mentor teams to deliver high-performance hardware for demanding vacuum environments.

You will own system design, define requirements, oversee DFx practices, and guide reviews from concept through assembly and testing, ensuring manufacturability and

Qualifications

• Master's degree in Mechanical Engineering or equivalent.
• Extensive experience in designing complex R&D or semiconductor equipment.
• Proven leadership and mentoring abilities.

Responsibilities

• Lead system design: drive design, integration, and validation of advanced R&D processing equipment.
• Define system-level requirements and innovative concepts linking mechanical precision to product quality.
• Lead design reviews focusing on manufacturability (DFx) and best practices.

Skills

Mechanical design

Thermal management

Vacuum systems

3D modeling

Leadership

DFx

Vendor management

Cross-functional collaboration

Project management

R2R design

Education

Master's in Mechanical Eng

Equivalent industrial experience

Tools

SOLIDWORKS

NX

COMSOL

ANSYS

Job description

Commonwealth Fusion Systems in Milpitas, CA is seeking a Principal Mechanical Engineer to lead end-to-end design of advanced R&D and semiconductor-grade vacuum equipment. You will shape architecture, drive cross-functional collaboration, and mentor teams to deliver high-performance hardware for demanding vacuum environments.

You will own system design, define requirements, oversee DFx practices, and guide reviews from concept through assembly and testing, ensuring manufacturability and