Dr. Jan-Georg Rosenboom is co-founder and CTO of MacroCycle Technologies. He is a sustainable plastics expert with 10 years in polymer chemistry and process engineering. He obtained a PhD from ETH Zurich specializing in Ring-Opening Polymerization first for PEF and then for PET polymers, which formed the basis for MacroCycle’s technology. He worked with SULZER ChemTech on process scaleup of the PEF synthesis technology after his PhD, until moving to MIT for postdoctoral work with Prof. Robert Langer before spinning out MacroCycle. He has published 18 papers with >2000 citations, 2 patents, and served as a plastics consultant for Apple, Henkel, and venture capital firms. He has won science outreach and public speaking awards, and gave 2 TEDx talks, including one on this technology: “Why plastic recycling is broken - and how to fix it”.