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July 18, 2026

Senior Principal Mechanical Engineer

Senior

185,004 - 200,004 USD

San Francisco Bay Area, CA

Diamond Foundry Inc. is solving the thermal limitation at the foundation of today's most exciting tech industries -- AI & cloud compute, electric-car power electronics, and 5G/6G wireless. We have managed to produce the world's first single-crystal diamond wafers and are now on a mission to put a diamond behind every chip.

We’re looking for an ambitious Mechanical Engineer to take responsibility for designing capital equipment and facilities systems, working across multiple engineering disciplines. You'll be working with an experienced team of mechanical and electrical engineers to take a pragmatic approach to equipment and facility design. You’ll be responsible for whole projects, pulling in the talents of others when needed.

This position will work out of our South San Francisco location.

Responsibilities

  • Designing, building, testing, and optimizing systems for high-volume capital equipment and high vacuum manufacturing equipment.
  • Prototyping and integration of new system functions to enhance existing equipment
  • Managing multiple domestic and international suppliers to construct parts and assemblies on time and within budget
  • Effective communication skills and ability to convey complex technical concepts to diverse stakeholders

Requirements

  • Bachelor's or Master's degree in Mechanical Engineering or a related field with 15+ years of applicable engineering design experience for high-volume, low-cost manufacturing tools.
  • Experience in 2D and 3D CAD (specifically AutoCAD and SolidWorks), proficiency in PDM and/or PLM software and systems, experience with welded steel frames, sheet metal, machined parts, process piping design and related connections, and documentation for high-volume builds.
  • Experience with electrical and pipe routing design such as high purity gases, caustic and explosive gases, manual and automatic valves, and experience with their appropriate use.
  • Experience with commercially available piping connection systems for high pressure and high vacuum, welding methods, and applicable safety considerations for these systems.
  • Experience with mechanical automation, repetitive moving systems, material flow, robotics, precision alignment of large tools, and facilities design.
  • Strong analytical skills to investigate and provide solutions for problems across multiple systems within a facility
  • Excellent problem-solving skills and ability to work in a fast-paced, collaborative environment

Benefits

Diamond Foundry believes in supporting employees from the workplace to their personal and home life. Benefits generally include health insurance, flexible spending accounts, retirement savings plans, life and disability insurance programs, paid and unpaid time away from work, and employee discounts. Benefits begin as early as the first day of employment.

Manufacturing and Engineering Departments Physical Requirements

  • Use appropriate PPE and follow all safety policies, practices, and procedures.
  • Sit, stand for long periods, walk, grasp, reach with hands and arms, lift below and above shoulders, bend, twist at the waist, climb, balance, stoop, squat, kneel, crawl, talk, hear, see, use fine finger manipulation, and complete repetitive motions.
  • Some tasks may require the use of ladders or stairs
  • Some tasks may require driving or the use of foot controls
  • Lift/carry and push/pull up to 50 pounds

This employer participates in E-Verify and will provide the federal government with Form I-9 information to confirm authorization to work in the U.S.