Fengfei Ma is an Associate Principal Scientist in Analytical Research and Development at Merck South San Francisco (SSF). He earned his PhD degree in Pharmaceutical Sciences from University of Wisconsin-Madison, where he focused on pioneering novel mass spectrometric-based methods for proteomic and peptidomic analysis. Upon joining Merck in 2018, Fengfei has demonstrated his expertise in developing MS and other analytical techniques to comprehensively characterize multispecific antibodies, ADCs, fusion proteins and other modalities. He implements a diverse range of analytical approaches to support developability/ manufacturability study for over 10 different biotherapeutics. Fengfei has also accumulated significant experience in both the Discovery and early development stages of drug development.