Since 1998, Leon E. Rosenberg has been a professor in the Department of Molecular Biology and the Woodrow Wilson School of Public and International Affairs at Princeton University. From 1991 to 1998, Rosenberg was Chief Scientific Officer of the Bristol-Myers Squibb Company. During Rosenberg's 26 year affiliation with Yale, he was the dean of Yale University School of Medicine, research geneticist, clinician, administrator, professor of human genetics, pediatrics, and medicine, and the first chairman of the Department of Human Genetics. Rosenberg and his colleagues conducted pioneering laboratory investigations into the molecular basis of several inherited disorders of amino acid and organic acid metabolism. Rosenberg received summa cum laude BA and MD degrees from the University of Wisconsin. He completed his internship and residency training in internal medicine at Columbia-Presbyterian Medical Center in New York City. Afterward, he moved to Bethesda, Maryland, to begin a six-year association as an investigator with the metabolism service of the National Cancer Institute. Dr. Rosenberg's honors include election to the National Academy of Sciences and to the Institute of Medicine, recipient of the Borden Award from the American Academy of Pediatrics and of the Kober Medal from the Association of American Physicians, and honorary Doctor of Science degrees from the University of Wisconsin and the Mt. Sinai School of Medicine. Rosenberg was the medalist for the Australian Society for Medical Research in 2002. He is a past president of the American Society of Human Genetics, the Association of American Physicians, the Funding First Initiative of the Mary Lasker Trust, and the Association of Patient Oriented Research.