Paschalis Alexandridis is Distinguished Professor in the Department of Chemical and Biological Engineering at the University at Buffalo, The State University of New York (SUNY), where he has served as Director of Graduate Studies in Chemical Engineering, co-Director of the Materials Science and Engineering program, and Associate Dean for Research and Graduate Education in the School of Engineering and Applied Sciences. He holds an affiliate appointment in the Department of Civil, Structural and Environmental Engineering, and has been visiting professor at Shinshu University, Kyushu University, and Technical University of Crete. He has a Diploma from the National Technical University of Athens and a PhD from Massachusetts Institute of Technology (MIT), both in chemical engineering, and has carried out postdoctoral research in polymer physical chemistry at Lund University.

Alexandridis' research utilizes molecular interactions and supramolecular assemblies to develop processes that are environment friendly and energy efficient, and products with desired properties and function. Ongoing projects address structuring via self-assembly and directed assembly of block copolymers, environmentally responsible solvents, and fluorinated surfactant sequestration from aqueous solutions. In the field of plastics recycling, Alexandridis is leading projects on advanced sorting, chemical recycling, recycling of multilayer films, and recycling of medical waste. He has authored 190 articles and 6 US patents (Google Scholar h-index 75 and 22300 citations).

Alexandridis is an elected Fellow of the American Association for the Advancement of Science (AAAS), American Institute of Chemical Engineers (AIChE), Royal Society of Chemistry (RSC), and International Association of Advanced Materials, and has served as chair of AIChE Area 1C: "Interfacial Phenomena" and on the executive committee of the American Chemical Society (ACS) Division of Colloid and Surface Chemistry. He is currently serving as the Editor-in-Chief of the Journal of Dispersion Science and Technology, co-Editor-in-Chief of the International Journal of Molecular Sciences (Physical Chemistry and Chemical Physics section), and Review Editor of the Journal of Surfactants and Detergents.