Dimitris I. Collias is a member of the U.S. National Academy of Engineering (NAE), Adjunct Professor of Chemical and Biomolecular Engineering at the University of Pennsylvania, and founder of Aeiforia Innovations, LLC, a sustainability and circular economy consultancy. 

He began his career in Greece as Special Adviser to the Minister of National Economy and Secretary-General of the National Statistical Service of Greece. He then spent 32 years at the Procter & Gamble Company (P&G) in the US, retiring as Senior Director – Research Fellow. He contributed to major P&G brands, led the development of platform technologies, and formed and led the company’s first circular economy group in Corporate R&D. His team, working internally and with partners in the industry, Universities, and startups, developed renewable chemicals and materials, and recycling technologies for plastics. Many of these technologies have been commercialized or are in various stages of commercialization. 

Dimitris I. Collias co-authored three books (including the National Academies’ New Directions for Chemical Engineering), and holds more than 500 granted patents worldwide. His external honors include the American Chemical Society (ACS) National Award for Affordable Green Chemistry (2020) and Packaging Europe’s “Driving the Circular Economy” Award (2025). He chairs the Advisory Board of the School of Chemical Engineering at the National Technical University of Athens (NTUA), where he earned his Diploma in Chemical Engineering, and holds a Ph.D. in Chemical Engineering from Princeton University.