Dr. Walker is the co-director of the University of Oregon's Institute on Violence and Destructive Behavior (IVDB). Walker’s research interests include social skills assessment and intervention, violence prevention, early intervention, school safety, and longitudinal research. Dr. Walker has a long-standing interest in behavioral assessment and in the development of effective intervention procedures for use in school settings with a range of behavior disorders. He has been engaged in applied research during his entire career, dating from 1966. Dr. Walker received the Council for Exceptional Children Research Award in 1993, and the University of Oregon Presidential Medal in 2000.
Hill is Chairman of the Board of Directors of the Oregon Social Learning Center and is a consultant to the Citizens Crime Commission, an affiliate of the Portland, Oregon, Metropolitan Chamber of Commerce. He received his Ph.D. in Special Education from the University of Oregon in 1967.