Mechanical Design Intern

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Peak Energy

The Storage Standard for the New Era of Energy

51-200 employeesFounded 2023San Francisco Bay Area, CaliforniaEnergy Technology
Actively hiringPaidFall 2026Energy Technology
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About the role#

Peak Energy is looking for a Mechanical Design Intern to join our Energy Storage Systems team. You will work on the mechanical design of utility scale sodium-ion energy storage systems. This role involves supporting mechanical system and component design while working alongside our manufacturing, test, and analysis teams.

What you'll do#

  • Focus on design areas such as module enclosures, adhesives, plastic components, high current conductors, and communications harnessing.
  • Work with thermal and structural analysts to inform design decisions.
  • Participate in rapid prototyping and testing.
  • Support product validation from initial concepts through field deployment.
  • Help ensure a smooth transition from product development to mass production.

What you'll need#

  • Currently pursuing a degree in mechanical engineering, engineering physics, or a related field.
  • A strong grasp of mechanical and thermal engineering fundamentals.
  • Basic understanding of power electronics and electrical fundamentals.
  • Familiarity with 3D CAD software and experience building prototypes.
  • A passion for renewable energy and sustainability.
  • Eligibility to work in the U.S.
  • Preferred experience includes CATIA V6 or Siemens NX, and familiarity with tools like MATLAB, FEA, or CFD.

Location & details#

  • Location: Burlingame, California.
  • Modality: On-site.
  • Term: Fall 2026.
  • Status: Full-time and paid at $30/hr.
  • Benefits include flexible time off, medical, dental, and vision coverage, a 401(k) plan, and equity opportunities.

About Peak Energy

Peak Energy is an energy technology company based in the San Francisco Bay Area. Founded in 2023, the firm focuses on sodium-ion battery energy storage systems. It partners with utilities and independent power producers to support grid resilience. The company currently employs 180 people.

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