Marketing director Olly Raeburn has been promoted to take on Edington's role. As a result, the bookmaker is now looking for someone to fill Raeburn's former post.
Prior to joining Coral, Raeburn held roles at PR and marketing agencies including Liquid Communications, Woo Communications and Partners Andrews Aldridge.
Parent company Gala Coral Group runs six businesses. Its main brands are Coral, the third-biggest retail bookmaker in the UK with a 20% market share, Gala Bingo and Gala Casinos.
Marketing activity in the gambling sector has grown significantly since the 2007 Gambling Act, which permitted casinos, bookmakers and online betting brands to advertise their services on TV and radio for the first time.