Energy Terminal · 2026-06-03 · 28 min
Stwart Pena Feliz is the Co-Founder and CEO of MacroCycle, a hard tech startup developing novel PET and polyester waste upcycling technologies. Stwart, along with his Co-Founder Jan-Georg Rosenboom, started MacroCycle while they were students at MIT. MacroCycle has received the backing of Breakthrough Energy, Clean Energy Ventures and The Engine. In the episode, Stwart shares how MacroCycle's ring chain chemistry allows for the company to dramatically improve the economics of recycling. He also shares how he built the world-class team of scientists and engineers at MacroCycle, explains how his experience as an engineer at ExxonMobil helps him build MacroCycle and provides advice for founders looking to receive the most value out of startup accelerator and incubator programs. For college students, Stwart discusses the best steps to take for creating a career of impact. And
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