Xuemei is currently a Senior Principal Scientist in the Translational Molecular Biomarkers Department at Merck & Co., Inc. in Kenilworth, NJ. She received her Ph.D. in Chemistry from Columbia University and performed her postdoctoral research at Cold Spring Harbor Laboratory. Afterwards, Xuemei joined the Proteomics Department in Molecular Profiling at Merck in 2004. She led the biochemistry group focusing on sample preparation for LC-MS based proteomics profiling for biomarker discovery and new target identification. In 2012, Xuemei transitioned to clinical biomarker development. Currently, she leads the immunoassay group to develop, validate, and deploy immunoassay-based biomarkers in all phases of clinical development and all therapeutic areas at Merck & Co., Inc.