Mark graduated from the Faculty of Law at the University of Windsor in 1981. He Articled at Weaver Simmons in Sudbury. Mark attended the Bar Admission Course at Osgoode Hall in Toronto and was called to the Bar on April 6, 1983.

Mark’s first position was in Chatham as the Director of Legal Assistance Kent, from 1983 to 1984. The clinic served the needs of the low-income community and Mark’s main focus was in the area of Worker’s Compensation litigation.

While at Legal Assistance Kent Mark served as an elected representative on The National Council of the Canadian Bar Association. Mark carried on in that capacity for three years. In that role, Mark participated on various committees involved in commenting on proposed changes to Workers Compensation legislation and the Young Offenders Act.

Mark then went to the Chatham firm of O’Brien, Jacklin and O’Brien. There he became involved in Criminal and Civil Litigation. After leaving that firm in 1986 Mark continued to practice in the areas of Criminal and Civil Litigation. In the 1990s the focus became Civil Litigation, mostly in the fields of Personal Injury and Employment Law. During the course of his litigation practice, Mark conducted trials throughout the province of Ontario at all levels of court, including the Court Of Appeal. Mark served as an Instructor in Employment Law at St. Clair College for two years.

Mark acquired the practice of long-time Blenheim lawyer Thomas Warwick Q.C. in 2006. The intent was to change the focus of his practice to real estate and business law and to serve the legal needs of the rural and agricultural community. Mark has maintained both the Chatham and Blenheim offices since 2006.