Matthew Ruis, Ph.D.
Director, Toxicology
Matthew Ruis, Ph.D., is a Director, Toxicology, Deerfield Discovery and Development, and joined the Firm in 2025. Prior to Deerfield, Dr. Ruis spent over three years at Certara, most recently as Associate Director of Toxicology. Before that, he served as a Postdoctoral Associate Toxicologist at Integrated Nonclinical Development Solutions. Dr. Ruis holds a B.S. in Environmental Science from Marist University and a Ph.D. in Toxicology and Reproductive Biology from Duke University.