Principal Mechanical Engineer

Principal Mechanical Engineer

Milpitas, CASuperconductor – Superconductor R&D / Full-time / On-site About Commonwealth Fusion Systems :   Commonwealth Fusion Systems is on a mission to deliver the urgent transition to fusion energy.Combining decades of research, top talent, and new technologies, we’re designing and building commercially viable fusion power plants. And working with policymakers and suppliers to build the energy industry of the future. We’re in the best position to make it happen. Since 2018, we’ve raised nearly $3 billion in capital, making us the largest and leading private fusion company in the world.Now we’re looking for more thinkers, doers, builders, and makers to join us. People who’ll bring new perspectives, solve tough problems, and thrive as part of a team. If that’s you and this role fits, we want to hear from you. Join the power movement as a Principal Mechanical Engineer We’re looking for a Principal Mechanical Engineer to join our R&D and equipment design team to help build the next generation of thin-film deposition technology. The Principal Mechanical Engineer will be responsible for the design and implementation of advanced R&D equipment and complex machinery. This role requires strong technical expertise, procedural discipline, and the ability to collaborate across engineering and technology functions to ensure safe, reliable, and high-performance equipment. If you enjoy working on complex design problems, mentoring others, and solving problems in a collaborative, fast-paced environment, this is your opportunity to make an impact.

What you'll do :

• Lead the design and implementation of advanced R&D equipment for thin film processing, including ownership of key mechanical modules and sub-systems
• Define system level requirements and drive innovative design concepts to meet these requirements
• Lead design reviews for overall mechanical system and key mechanical subsystems
• Generate and maintain interfaces with other engineering subsystems
• Report on and be accountable for project progress to stakeholders
• Work effectively within a multi-disciplinary team of top scientists and engineers
• Mentor engineering staff for effectiveness and delivery of on-time & in-spec outcomes
• Get things done : drive projects, consistently deliver, act with speed

What we’re looking for :

Bonus points for :

Must-have Requirements :

$150,000 - $225,000 a yearSalary range for this full-time position + equity + benefitsThe actual salary will depend on level, location, qualifications, and experience. The range displayed on each job posting reflects new hire salaries for the position across all US locations. Benefits include :