Intern - Composites Engineer - Spring 2026

Commonwealth Fusion Systems • Somerville, MA

100d • $23 - $35

About The Position

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 Composites Engineering Intern. We are looking for talented technical interns to join our team! CFS interns are highly valued within the organization and placed into meaningful and challenging roles.

Requirements

• Pursuing an engineering degree with focus in the fields of Mechanical or Electrical Engineering
• Fundamental understanding of mechanical, electrical, materials engineering, as well as familiarity with experimentation and data analysis
• Composites experience
• Experience with superconductors and/or the technology that surrounds them; high vacuum, cryogenics, high power systems
• Demonstration of exceptional results through a range of different pursuits
• High self-motivation and drive to execute quickly with excellent troubleshooting/problem-solving skills

Nice To Haves

• Willingness to travel or work required nights/weekends/on-call occasionally
• Dedication to safety to mitigate industrial hazards that may include heat, cold, noise, fumes, strong magnets, lead (Pb), high voltage, and cryogenics

Responsibilities

• Testing that retires risks for CFS's HTS magnets and magnet components
• Create test articles from existing designs, and then define tests to validate critical requirements

Benefits

• 40 hours of sick time
• Health, dental, and vision insurance
• 401(k) with employer matching (must be 21 years of age to enroll)
• Professional growth opportunities
• Team-building activities

What This Job Offers

• Career Level: Intern
• Industry: Utilities
• Education Level: Bachelor's degree