Calling the bold.

Calling the bold.

Uncork-backed companies are hiring explorers, builders, and operators ready to help chart new territory.

Uncork-backed companies are hiring explorers, builders, and operators ready to help chart new territory.

Materials Scientist or Engineer - Precision Sphere Production

Inertia

Inertia

Livermore, CA, USA
Posted on Jan 6, 2026

Location

Livermore

Employment Type

Full time

Location Type

On-site

Department

Design and Engineering

Overview:

We are seeking a Materials Scientist to lead the development of mass production of several mm sized precision silicon spheres for next-generation fusion targets. This role will pioneer advanced precision techniques for mass production of precision fusion capsules on machines to enable large-scale manufacturing on the scale of a 10 Hz manufacturing rate.

Primary Responsibilities:

  • Develop equipment and processes for grinding, polishing, lapping spheres or alternative techniques.

  • Develop/oversee creating low cost feed stock for sphere production with single crystal silicon.

  • Implement precision metrology appropriate for mass production of spheres.

  • Assist with polishing of diamond overcoated spheres.

  • Investigate other related materials issues needed in the production of targets at mass scale.

Qualifications:

Required:

  • PhD or MS, or experience equivalent, in Materials Science, Applied Physics, Mechanical Engineering, Manufacturing Engineering, or related field.

  • Experience with ceramics or other brittle materials.

  • Strong analytical measurement skills.

Preferred:

  • Demonstrated ability to work with mass production machines or processes.

  • Experience polishing to a high degree of smoothness.

  • Experience with sphere or ball manufacturing.

  • Familiarity with process scale-up or industrial mass production.

Salary & Benefits:

We offer an excellent benefits program, including Medical, Dental, and Vision plans, company-paid holidays, matching 401k, and more!

About Inertia:

Inertia is taking the most direct, scientifically-proven path to commercializing fusion, leveraging the only successful achievement of fusion ignition, using a process that was pioneered at the U.S. Department of Energy’s (DOE) Lawrence Livermore National Laboratory (LLNL). With groundbreaking innovation, transformative technology, and multi-year investment, Inertia is committed to commercializing fusion energy in the next decade.