Summer 2026 Internship - Mechanical Engineering, Pulser

Pacific Fusion•Fremont, CA

3d•Onsite

About The Position

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 seeking an exceptional Mechanical Engineering Intern - Pulser Engineering to join our dynamic team and create the path to commercial fusion energy. In your role as a mechanical engineering intern, you will get to own a project through the planning, design, assembly, and testing phases of development. Our intention is for our interns to get experience in cradle to grave design as well as hands-on experience building and testing these systems. All of our intern projects are high priority and value-added efforts that directly contribute to the successful development of our fusion system.

Requirements

Junior or Senior standing in 4-year college degree program in mechanical engineering
Strong understanding of mechanical engineering first principles
Effective written and verbal communication skills
Basic knowledge of stress analysis hand calculations, finite element analysis, 2D drawings, design for assembly, and design for manufacturing
Exposure to 2D and 3D CAD software tools such as Creo or Solidworks
Able to work full time, onsite for a minimum of 10 consecutive weeks beginning in June 2026

Nice To Haves

Hands on mechanical design experience through classes, clubs, or hobbies
Experience with conventional machining and rapid prototyping technologies
Experience designing a system architecture and weighing design options to accomplish specific system requirements
Experience writing build instructions or test plans
Excellent measurement, technical writing, and data analysis skills
Eagerness to both teach and learn
Ability to design, build, and operate test stands and equipment
6+ months of a previous internship, co-op, or academic project experience outside of normal classes
GPA of 3.5 or above
Basic experience with CAD Software, MATLAB, Python, or Excel