Dr. William Clarke, PhD, MBA, DABCC received his Ph.D. in Analytical Chemistry from the University of Nebraska in Lincoln in 2000, followed by a post-doctoral fellowship in Clinical Chemistry at the Johns Hopkins School of Medicine, ending in 2002. In addition, he received an MBA focused on medical services management from the Carey School of Business at Johns Hopkins in 2007. Following his post-doctoral fellowship, he remained at Johns Hopkins, where he is a Professor in the Department of Pathology, as well as the director of both Point-of-Care Testing and Clinical Toxicology for the hospital.

His research interests include clinical mass spectrometry, method development and evaluation for therapeutic drug monitoring, clinical toxicology, point-of-care testing, and development/validation of biomarkers for use in drug management. Dr. Clarke has published as author or co-author over 130 peer-reviewed manuscripts or book chapters, is the Co-Editor of the textbook Contemporary Practice in Clinical Chemistry and is the Co-Editor-in-Chief of the journal Practical Laboratory Medicine.