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Much of the work carried out by DTT is in support of the National Toxicology Program (NTP), an interagency partnership of the Food and Drug Administration, National Institute for Occupational Safety and Health, and NIEHS.

David Crizer, Ph.D., is a chemist in the Predictive Toxicology and Screening Group, Mechanistic Toxicology Branch, Division of Translational Toxicology (DTT). Before joining DTT he completed his doctorate in Analytical Chemistry at the University of North Carolina at Chapel Hill under the direction of Gary Glish. At UNC his dissertation research focused on the use of mass spectrometry, differential ion mobility, and theoretical chemistry to understand novel ion chemistries.

His work at DTT is focused on the development of mass spectrometry-based untargeted metabolomic methods to aid in the screening of potentially toxic substances. His research also includes analytical method development for hepatic clearance assays, specific activity assays, and metabolite profiling assays. Other interests include the investigation of in silico metabolite prediction and how predictions compare to in vitro data.

Crizer obtained his B.S. in Chemistry from James Madison University followed by a Ph.D. in Analytical Chemistry from University of North Carolina at Chapel Hill.