Doug grew up in Fairfield County, South Carolina, where he attended Winnsboro High School. He is a graduate of both University of South Carolina and University of South Carolina School of Law. He began practicing law in 1975. While serving as an Assistant Solicitor in Richland and Kershaw Counties, South Carolina, he was in charge of the Major Crimes Unit. He entered private practice in 1979. As a partner in the firm of Lewis, Lewis, Bruce and Truslow, he focused on general litigation. In 1987, Doug formed his solo practice, Douglas N. Truslow, PA. In 2009, he and his son formed Truslow & Truslow, to serve the citizens and small businesses of South Carolina.