He joined the faculty in August 2002 after a 26 year career as an Environmental Health Officer with the U.S. Public Health Service. During his career with the Public Health Service, Dr. Bohan spent 19 years with the Indian Health Service serving in White Earth, MN, Bemidji, MN, Cincinnati, OH, and Window Rock, AZ. His last seven years were spent at the Centers for Disease Control and Prevention within the National Center for Environmental Health where he played a key role in developing the Environmental Health Services Branch. Dr. Bohan has held several management positions in environmental health.