Tim Dempsey is a retired criminal justice professional and native of Omaha. He graduated from Omaha Central High School, and holds a Bachelor of Science degree in Criminal justice with a minor in education from the University of Nebraska at Omaha (UNO). Dempsey also earned a Master's degree in Public Administration from UNO. Teaching has always been his avocation. During the last twenty-five years, Dempsey has served as an adjunct instructor for the University of Nebraska at Omaha, College of Saint Mary, and Metropolitan Community College.
Before starting his law enforcement career, Dempsey worked for the Omaha Public Schools in several capacities including security and coaching. Over the years, he has served on numerous boards and commissions including Nebraska's Crime Commission, Juvenile Justice Commission, and recently as a board member of Nebraska's Office of Violence Prevention. Dempsey still works part-time for the University of Nebraska at Omaha, and is also a part-time historian.