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Senior Mechanical Designer

Pacific Fusion

Pacific Fusion

Design
San Leandro, CA, USA
USD 138,100-207,100 / year + Equity
Posted on Dec 1, 2025

About Pacific Fusion

Pacific Fusion was founded in 2023 with the mission to power the world with abundant, affordable, clean energy.

We are rapidly designing and building a pulsed magnetic fusion system to achieve net facility gain (more fusion energy output than stored energy input). In parallel, we are developing the key components required to build affordable fusion systems.

Our plans are ambitious. We have raised over $900M so far from incredible investors, resourcing us to deliver on these plans. We are bringing together the best scientists, engineers, and operators from the fusion community, hard tech industry, and other sectors. We are united by a shared sense of urgency to provide clean power for the world, particularly managing climate change while meeting growing global energy demand. You can read more about us in this letter from our founders.

Why This Role Matters

Pacific Fusion is looking for a Senior Mechanical Designer to join our growing target fabrication team. You will work with a diverse group of talented engineers and physicists to design precision components and assemblies for use on Pacific Fusion’s pulsed power fusion system. You will be responsible for creating models and technical drawings, with involvement in all stages from initial design to fabrication and final inspection.

What You'll Do

  • Create models and technical drawings of high precision components and assemblies that range in size from less than a millimeter to centimeters
  • Maintain model and drawing files in an organized database
  • Design engineering assemblies that will be integrated into Pacific Fusion’s demonstration system
  • Work with a team of engineers, physicists, designers, and technicians to come up with creative design solutions that take into account manufacturability and scaling to high throughput production
  • Conduct and participate in design reviews across interdisciplinary teams

What You Bring

  • Strong background in creating engineering drawings and modeling in CAD, preferably with Creo
  • Proven ability to work across multidisciplinary teams through engagement with engineers, machinists, and technicians to achieve engineering solutions
  • Experience in document and drawing control in a centralized database to track revisions and process development changes
  • Understanding of modern manufacturing processes including precision machining, additive manufacturing, and inspection techniques to ensure manufacturability and that all design criteria are met
  • Demonstration of strong problem solving skills with attention to detail while meeting schedule deadlines
  • Strong communication skills with the ability to give and take feedback in a highly collaborative team environment

Bonus Points For

  • Experience working with small components requiring micron geometric tolerances and nanometer surface finishes
  • Understanding of modern precision machining capabilities to include single-point diamond turning and 5-axis precision machining centers
  • Strong understanding of tolerance stackups in complex engineering assemblies
  • Leadership abilities with a history of providing guidance to less experienced team members

Pay Range:
$138,100$207,100 USD

Benefits

  • Industry-competitive salary

  • Equity plan

  • 6% employer 401k matching

  • Generous paid time off (including sick leave, vacation, paid family leave)

  • Medical, Dental, and Vision insurance

Actual base salary offered will be determined by: experience, skills, and work location. This range is for base salary, our total compensation includes equity and benefits. We welcome you to apply even if your expectations are outside our listed range.

Pacific Fusion is committed to creating a diverse environment and is proud to be an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status.

Pacific Fusion is committed to providing reasonable accommodations for qualified individuals with disabilities in our job application procedures and throughout employment. If you need assistance or any accommodation, please let us know.

Pacific Fusion does not accept unsolicited resumes from recruiters or employment agencies without a fully executed recruitment agreement in place. In the absence of such agreement, Pacific Fusion reserves the right to pursue and hire any candidates without an obligation to pay fees. Agencies are requested not to contact Pacific Fusion hiring managers or employees regarding recruiting services.