Mechanical Design Engineering Internship

Company Overview

Amperesand is reinventing how the world powers its most critical systems.

We are facing a once-in-a-generation opportunity for infrastructure disruption. Electricity demand is skyrocketing, driven by AI factories, electric vehicles, and modern industrial growth. Energy supply is shifting to incorporate a more diverse mix of resources - including solar, gas, and batteries - at a massive scale.

And yet the power infrastructure behind our latest mega-projects hasn't meaningfully changed in nearly 100 years. Supply chains for today's infrastructure equipment can't match the pace and sophistication of critical energy projects. Amperesand is building hardware and software that rewrites this broken power infrastructure playbook to support a new era of energy abundance.

We've built a new class of intelligent, software-defined power infrastructure products leveraging a decade of advanced medium voltage Solid State Transformer research that's now ready for commercial deployment.

Our products and solutions go far beyond the capabilities of traditional electrical equipment. We make power systems that are faster to deploy, dramatically smaller and more efficient, and capable of supporting modern, dynamic energy needs for tomorrow's most demanding energy consumers.

Scalable in-house advanced manufacturing capability is our foundation for meeting timeline and quality expectation to serve infrastructure customers around the world.

Amperesand is led by breakthrough energy hardware development veterans and funded by top tier investors who share our vision of building a category-defining energy technology company.

With hubs in San Francisco, Reno, and Singapore, our global team is laser focused on building foundational technology to solve the most pressing problems in power infrastructure at scale.

Join us in building the power foundation of the future!

Internship Duration:
May 2026 - August 2026

Role Summary

Amperesand is working to develop, build, test, and validate a ground-up redesigned next-generation solid state transformer (SST) and the power stage modules (PSMs) that convert power from medium-voltage AC to customer-facing DC output. This internship will include building and testing of prototype units, root cause analysis of issues found, and design and changes of parts to fix or improve.

Responsibilities:

• Utilize
  
  CAD software to create detailed mechanical designs. 3DX/Catia experience preferred but not required.
• Model and design complex electro-mechanical parts, including plastics, sheet metal, insulators, magnetic components, and high-voltage connectors.
• Perform mechanical design analysisby means offirst principal calculation or simulation with commercial software, including structural FEA, thermal CFD, vibration, and fatigue assessments.
• Solve packaging challenges involving electrical isolation, sealing, thermal dissipation, EMI/EMC shielding, and mechanical shock/vibration.
• Perform prototype development, fabrication, assembly, and mechanical testing of new designs.
• Support root-cause analysis of design issues in pilot or production builds and lead iterative improvements.
• Define and execute validation test plans including structural, thermal, and environmental testing.
• 2D drawings with GD&T for production and inspection.
• Create engineering documentation, tolerance stacks, BOMs, and release packages through PLM systems.
• Collaborate cross-functionally with electrical, thermal, firmware and controls, manufacturing, test, and industrial design teams.
• Work closely with suppliers to optimize DFM, DFA, and tooling strategies for high-volume production.

Qualifications:

• Final year undergraduate standing or graduate study in Mechanical Engineering or a closely-related field.
• Expertise in CAD modeling using 3D EXPERIENCE (CATIA V6/V5), Solid Works, NX, or Creo.
• Deep understanding of mechanical fundamentals-statics, dynamics, heat transfer, and materials.
• Working knowledge of materials: metals (aluminum, steel), plastics, ceramics, gaskets, potting compounds.
• Comfortable with root-cause analysis, failure mode resolution, and mechanical reliability testing.
• Passion for product innovation, sustainability, and enabling…