Mechanical Design Intern (Winter 2027)

Peak Energy; San Francisco (CA); On-site; USD 35,817 - 46,838; Part time

Benefits offered by this job

Flexible time off

Medical coverage

Dental coverage

Vision coverage

401(k) plan

Equity opportunities

Job summary

Peak Energy is seeking a Mechanical Design Intern to contribute to our Energy Storage Systems team. You will assist in mechanical designs of sodium‑ion storage solutions and collaborate with design, analysis, manufacturing, and test groups to bring concepts to reality.

Ideal candidates are hands‑on, eager to learn, and pursuing a mechanical engineering or equivalent degree, with a foundation in mechanical/thermal engineering and basic power electronics knowledge. US work eligibility is required.

Qualifications

• Pursuing a mechanical engineering, engineering physics, or equivalent degree.
• Strong grasp of mechanical and thermal engineering fundamentals.
• Basic understanding of power electronics and electrical fundamentals.
• Familiarity with 3D CAD software.
• Experience with building prototypes.
• Passion for renewable energy and sustainability.
• Eligible to work in the U.S.

Responsibilities

• Focus on design areas of need, including module enclosure, adhesives, plastic component design, high current conductors, and harnessing.
• Interface with thermal and structural analysts and other design functions to inform decisions.
• Drive and participate in rapid prototyping and testing.
• Support validation of Peak products from concept through field deployment.
• Ensure a smooth transition from maturing product to mass production.
• Maintain a team spirit and a can‑do attitude.

Skills

Mechanical design fundamentals

Prototype building

Team collaboration

Communication skills

Education

Pursuing mechanical engineering or equivalent

Tools

3D CAD

CATIA V6

Siemens NX

MATLAB

FEA

CFD

Job description

Peak Energy is looking for a Mechanical Design Intern to join our Energy Storage Systems (ESS) team and work on mechanical designs of our utility scale sodium-ion energy storage systems (ESS). You will be supporting mechanical system and component design and will work with other design, analysis, manufacturing and test teams to realize your designs. You are hands‑on, highly motivated and excited to learn.

Responsibilities

• Focus on design areas of need, which may include: module enclosure, adhesives, plastic component design, high current conductors, communications harnessing
• Interface tightly with partners such as thermal and structural analysts and other design functions to inform design decisions
• Drive and participate in a culture of rapid prototyping and testing
• Support validation of Peak products from concept through field deployment
• Ensure a smooth transition from maturing product to mass production
• A great team spirit and get‑it‑done attitude. No job is too big or too small.

Minimum Qualifications

• Pursuing a mechanical engineering, engineering physics, or equivalent degree
• Strong grasp mechanical and thermal engineering fundamentals
• Basic understanding of power electronics and electrical fundamentals
• Familiarity with 3D CAD software
• Experience with building prototypes
• Passion for renewable energy, sustainability, and driving positive environmental impact through technology innovation.
• Eligible to work in the U.S.

Preferred Qualifications

• CATIA V6 or Siemens NX experience
• Familiarity with simulation or analysis tools like MATLAB, FEA, or CFD

Peak Energy Core Values

• Speed Through Focus: Prioritize what matters most and execute quickly without distractions.
• Mission Over Self: Put the company's mission and team success ahead of individual interests.
• Face the Brutal Truth: Embrace honesty, even when it’s uncomfortable, to make informed decisions.
• Be a Good Person: Treat everyone with respect and integrity, fostering a positive and ethical work environment.

The pay for this role is $30/hr. Our competitive benefits package includes flexible time off, comprehensive medical, dental, and vision coverage, a strong 401(k) plan, and equity opportunities. Join us to thrive in a supportive environment while making a meaningful impact in the energy sector!

At Peak Energy Technologies Inc., we believe that a diverse and inclusive workplace makes us a more capable, innovative, and competitive company. We welcome people who represent diversity in their backgrounds, ethnicities, cultures, and experiences. Peak Energy Technologies Inc. is an equal opportunity employer, aiming to reach our company’s full potential by cultivating an inclusive workforce. We do not discriminate on the basis of race, color, ancestry, religion, national origin, sexual orientation, citizenship, marital or family status, disability, gender identity or expression, veteran status, or any other legally protected status.

About the Company

Peak Energy is the first American venture to advance globally proven Sodium‑Ion battery systems as the storage standard for the new era of renewable energy on a resilient grid.

Sodium‑Ion is cheap, readily available and safe, making it the leading contender in a rapidly evolving market.

Our leadership team is powered by decades of expertise in scaling gigawatt‑level innovation at world‑class companies such as Tesla, Northvolt, SunPower, Fluence, and Enovix. We are backed by strategic investment and product partners such as TDK Ventures and Eclipse Ventures.

We are a team of engineers, operators, entrepreneurs, and partners driven by a shared ambition to set the new performance standard for renewable energy and grid resilience.