Geoff G. Z. Zhang, Ph.D., FAAPS, is the Founder and Chief Technical Director of ProPhysPharm; an Adjunct Professor of the Department of Industrial and Molecular Pharmaceutics (IMPH) at Purdue University, since 2016; and a Fellow of American Association of Pharmaceutical Scientists, since 2011. He has contributed broadly to Physical Pharmacy, specifically in the areas of salt and polymorph screening, co-crystallization and crystal engineering, characterization and crystallization of amorphous solids, physical chemistry of supersaturated solutions and the design of amorphous solid dispersions. He has published 126 peer-reviewed articles, reviews, and book chapters; given 79 invited talks at conferences, universities, pharmaceutical companies, and FDA; and presented 157 posters. He is one of the editors of the popular reference book Developing Solid Oral Dosage Forms: Pharmaceutical Theory and Practice. Prior to founding ProPhysPharm in 2024, he spent over 26 years at Abbott/AbbVie. He is a co-inventor of over 170 patents and patent applications including composition of matter, crystal form, formulation, processing, and method of use on clinical candidates and marketed products. He received his B.Sc. in Physical Chemistry from Fudan University; and Ph.D. in Pharmaceutics from University of Minnesota  Twin Cities.