Mark has practiced as a criminal lawyer in Northeast Georgia since 1985. After receiving his JD from the University of Georgia School of Law, he associated with Cook, Noell, Tolley and Aldridge, where he became a partner in 1987. In 1997, Mark opened a solo practice in downtown Athens and then relocated to his current office at Resource Valley in 1998. From the beginning of his practice, Mark has concentrated his trial practice almost exclusively as a criminal lawyer and managing personal injury cases. His past and present associations include Georgia Association of Criminal Defense Lawyers ("GACDL") (vice president); the Georgia Trial Lawyers Association ("GTLA"), the Western Circuit Bar Association (President), the Oconee Rotary Club (president), Briarwood Baptist Church (deacon), the Oconee Athletic Foundation (board member), the Athens Rifle Club (president), the Clarke County Wildlife Association (vice president), Leadership Oconee, YMCA fundraising, UGA Alumni Association, United Way of Northeast Georgia, and other civic endeavors. Mark is married to Kathy, and they have two grown children, Motie and Laura Slade. Mark and his family are active members of Grace Fellowship Church.