Summer 2027 Internship- Mechanical Engineering

Pacific Fusion • Fremont, CA

1d • Onsite

About The Position

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 pulser-driven inertial 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.

Requirements

• Junior or Senior standing in a 4-year Mechanical Engineering program
• Strong foundation in mechanical engineering fundamentals and first principles
• Clear, confident written and verbal communication skills
• Working knowledge of stress analysis (hand calcs and FEA), 2D drawings, and design for manufacturing and assembly
• Experience using 2D and 3D CAD tools such as Creo or SolidWorks
• Able to work full time, onsite for a minimum of 12 consecutive weeks beginning in Mid May- Mid June 2027

Nice To Haves

• Hands-on mechanical design through coursework, clubs, research, or personal projects
• Experience with conventional machining, shop tools, and rapid prototyping
• Experience defining system architectures and making design tradeoffs against requirements
• Experience writing build instructions, procedures, or test plans
• Strong measurement, documentation, and data analysis skills
• Curiosity, humility, and a desire to both teach and learn
• Ability to design, build, and operate test stands and experimental hardware
• Experience or strong interest in kinematics
• Experience or strong interest in structures
• Experience or strong interest in robotics
• 6+ months of prior internship, co-op, or substantial project experience
• GPA of 3.5 or higher
• Experience with CAD, MATLAB, Python, or Excel

Responsibilities

• Work on a variety of meaningful projects across the target area engineering team
• Own a project through the planning, design, assembly, and testing phases of development
• Get experience in cradle to grave design as well as hands-on experience building and testing these systems
• Directly contribute to the successful development of our fusion system

Benefits

• Meaningful, resume-building engineering work on real hardware
• A chance to design, build, and test real systems
• Mentorship from experienced engineers in a high-impact environment
• Exposure to the full product lifecycle—from concept and design to build, test, and operation
• A collaborative, hands-on, learning-driven culture
• Daily catered lunch and unlimited snacks
• An unforgettable summer working on systems that truly matter!
• 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

What This Job Offers

• Job Type: Full-time
• Career Level: Intern