Roger Liu is a scientist at Bristol Myers Squibb. At BMS, he is responsible for supporting mass spectrometry capabilities in support of bioprocess development and analytical strategies for protein characterization. Dr. Liu earned his Ph.D. with Dr. Michael L. Gross from Washington University in St. Louis, focusing on the characterization of protein higher order structures through developing and applying novel mass spectrometry-based approaches, including fast photochemical oxidation of proteins, hydrogen deuterium exchange, footprinting by targeted reagents, and native spray. He has authored and coauthored over 12 publications, delivered oral and poster presentations for various conferences, and served as a peer reviewer for many journals.