Principal Mechanical Design Engineer, Industrial Enclosures

Enphase Energy is a global energy technology company and a leading provider of solar, battery, and electric vehicle charging products. Founded in 2006, our innovative microinverter technology revolutionized solar power, making it a safer, more reliable, and scalable energy source. Today, the Enphase Energy System enables users to make, use, save, and sell their own power. Enphase is also one of the most successful and innovative clean energy companies in the world, with more than 80 million products shipped across 160 countries.

Join our dynamic teams designing and developing next-gen energy technologies and help drive a sustainable future!

About The Role

Imagine defining the physical backbone of a product that will reshape how the world generates and distributes power. The Power Systems Innovation team housed within the office of the CTO is building Enphase's first-ever Solid State Transformer, a breakthrough technology that replaces bulky, legacy transformer hardware with sleek, software-defined power conversion. As our Principal Mechanical Design Engineer, you will own the structural envelope that protects this technology in the field: the enclosure, thermal architecture, and environmental sealing that let a cutting-edge power electronics platform survive punishing outdoor conditions while looking and feeling like the future. This is a rare greenfield opportunity—early-stage, high-visibility, and deeply cross-functional—where your design choices will directly define the product's form factor, reliability, and market readiness. If you thrive on turning blank-sheet challenges into production-ready hardware and want your fingerprints on a product that will be deployed across the energy grid, this role is for you. You will join a team of exceptionally talented engineers and scientists at Enphase—a global energy technology leader whose products are installed on more than 5 million homes and businesses worldwide. Our engineering culture is built on intellectual rigor, rapid prototyping, and a shared obsession with elegant solutions to hard problems. The people here are among the best in power electronics, firmware, mechanical design, and systems engineering—and they will push you to do the most impactful work of your career.

What You Will Do

Architect the complete enclosure system  for Enphase's Solid State Transformer—structural frames, panels, rails, and mounting systems—balancing ruggedness, weight, cost, and aesthetics from first sketch through volume production

Own ingress protection end-to-end : define IP55/IP65 sealing strategies, select gaskets and drainage paths, run validation tests, and iterate until every field scenario—driving rain, dust storms, coastal salt spray—is covered

Lead structural analysis and FEA  across static loads, vibration, shock, and seismic qualification, turning simulation results into lighter, stiffer, more cost-effective designs

Drive material and corrosion-protection decisions —sheet metal alloys, polymers, coatings, plating, and galvanic isolation—ensuring long term outdoor durability in harsh climates

Design high-performance door and access systems  with integrated latching, locking, and hinge mechanisms that balance security, weather resistance, and fast field serviceability

Integrate forced-air cooling architectures  into the enclosure to support aggressive thermal targets without compromising environmental sealing

Bring your designs to life —build 3D CAD models and production drawings in SolidWorks, collaborate with suppliers and contract manufacturers, and get hands-on with prototype fabrication and electromechanical assemblies

Define verification strategy : author functional and performance requirements, design test plans, execute tests, and close the loop with rigorous design-test-analysis documentation

Shape the team's technical culture  by mentoring junior engineers, championing best practices in enclosure design, and contributing to a fast-moving, innovation-driven environment

Accelerate your technical growth —work shoulder-to-shoulder with PhD-level engineers, firmware architects, and systems thinkers who challenge assumptions and raise the bar daily; this team will stretch you in ways no ordinary engineering role can

Expand your impact beyond enclosures —contribute to system-level trade-offs across thermal, electrical, and mechanical domains, gaining exposure to the full Solid State Transformer architecture and broadening your expertise into adjacent disciplines

Help build a category-defining product —Enphase is a proven innovator that disrupted the solar microinverter market and now aims to do the same for medium-voltage power conversion; your work will be visible at the highest levels of the company and across the energy industry

Who You Are And What You Bring

BS/MS/PhD Mechanical Engineering or closely related discipline

BS and 15+ years / MS and 12+ years / PhD and 8+ years of mechanical design experience

Candidates with great…