Commonwealth Fusion Systems
Senior Mechanical Engineer - Vacuum
$146K–$210K
Milpitas, CA · On-site · Senior · Full-time · Posted Oct 28, 2026
- Experience
- 7+ years designing and implementing complex R&D systems or semiconductor manufacturing equipment.
- Education
- Master’s degree in Mechanical Engineering or a related field (or equivalent industrial experience).
About the job
Designs, integrates, and validates advanced thermal vacuum equipment and R&D machinery, from concept through testing and implementation.
What you'll do
- Lead system design, integration, and validation; define system requirements and design concepts.
- Conduct mechanical design reviews and maintain engineering workflows and best practices.
- Coordinate with cross-functional teams and report project milestones to stakeholders.
What they ask for
- Practical experience with vacuum architecture and thermal management systems; deep understanding of outgassing, seal integrity, and pump-down optimization.
- Expertise in 3D modeling and FEA/thermal simulation tools.
- Hands-on experience with machining, prototyping, and hardware troubleshooting.
- Experience selecting and qualifying vendors, and leading in direct and matrixed organizations; able to meet the stated physical, travel, schedule, and safety requirements.
Nice to have
- Experience building first-of-kind or experimental semiconductor R&D or thin-film deposition tools.
- Familiarity with SEMI, ASME, ASTM, or other mechanical codes; experience designing precision motion and motor-controlled systems.
Pay
USD 146,000–210,000 per-year-salary (base salary)
Tools
SolidWorks, NX, COMSOL, ANSYS, SEMI, ASME, ASTM
Model-written summary · the original posting is authoritative