Mark Pejic was promoted to the top job at MediaCom in 2011 after a two-year stint as chief operating officer under Toby Jenner. Jenner was promoted to executive chairman, with Pejic stepping up amid a shake-up of the media agency's senior leadership. Prior to joining MediaCom in 2009, Pejic was managing director of Zenith Media, having joined the agency in 2002. He began his career as a dispatch boy at JWT in 1989, and after spending nine years in various media positions at the agency, moved to George Patterson Bates in a senior management role.
