Project Engineer Intern

Peak Energy 

Job Title: Project Engineer Intern (Summer 2026) 

Location: Burlingame, CA (onsite)

Reports to: Head of Product 
Position Type: Full-time Internship (10–12 weeks, Summer with opportunity to extend) 

 

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 safe, abundant, and cost-effective—positioning it as a leading technology for long-duration, utility-scale energy storage. 

Our leadership team brings decades of experience scaling gigawatt-level energy and hardware platforms at companies including Tesla, Northvolt, Apple, Powin, Enovix, Zipline, Solid Power, and Fluence. We are backed by strategic investors and partners such as TDK Ventures and Eclipse Ventures. 

We are a team of engineers, operators, and builders working to redefine grid-scale energy storage and accelerate the clean energy transition. 

 

About the Internship 

As a Project Engineer Intern, you’ll support the technical and engineering execution of Peak’s utility-scale energy storage projects. You’ll work closely with Project Engineers, Project Managers, EPC partners, and internal ESS engineering teams to help translate conceptual designs into buildable, cost-effective projects. 

This internship offers hands-on exposure to front-of-the-meter BESS projects, including site layout, interconnection considerations, EPC coordination, and technical inputs to project economics. 

What You’ll Do 

• Support the development of site layouts, conceptual electrical designs, and engineering packages for utility-scale energy storage projects 

• Assist with technical due diligence, including reviewing geotechnical, environmental, and interconnection studies 

• Collaborate with EPC partners to review constructability, cost drivers, and schedule assumptions 

• Support Project Managers on technical inputs related to permitting, AHJ requirements, and community engagement 

• Help review and incorporate interconnection requirements, codes, and standards into project designs 

• Translate technical assumptions into cost and performance inputs for internal project models 

• Contribute to RFP responses, bid packages, and customer-facing technical materials 

• Partner cross-functionally with Finance, Sales, and internal Cell and ESS Engineering teams 

 

Minimum Qualifications 

• Currently pursuing a Bachelor’s or Master’s degree in Electrical, Mechanical, Civil Engineering, Energy Systems, or a related field 

• Interest in utility-scale renewable energy, power infrastructure, or energy storage projects 

• Experience with or willingness to learn tools such as AutoCAD, Excel, or similar engineering/software tools 

• Strong analytical, problem-solving, and communication skills 

• Ability to work collaboratively across technical and non-technical teams 

• Passion for clean energy, sustainability, and climate impact 

• Eligible to work in the U.S. for the duration of the internship 

Preferred Qualifications 

• Prior internship or project experience in renewable energy, power systems, EPC, or infrastructure projects 

• Exposure to utility-scale solar, wind, or battery energy storage systems (BESS) 

• Coursework or experience related to power systems, construction management, or energy project finance