Prior to his current position, he was an associate professor of Neurology and Psychiatry at the University of Virginia, where he served as the inaugural clinical director of the Brain Injury and Sports Concussion Institute and director of the neurology sleep service. He graduated from the University of Virginia School of Medicine in 1992 and completed a combined residency in neurology and psychiatry at the San Antonio Uniformed Services Health Education Consortium in San Antonio in 1998. He later went on to complete a sleep medicine fellowship there in 2011.