Not to be confused with the managing director.
Marketing directors are the people in charge of the marketing department at Egmont. They are the superiors of the marketing manager and marketing assistant and are in charge of all the comic's major decisions with regards to the budget and the way Sonic the Comic was sold.
The original marketing director was Rob McMenemy, who switched from his initial role of publisher in Issue 163. When McMenemy became the managing director in Issue 185, Douglas Pocock was promoted from marketing manager to director. He presumably took the comic through the reprint run, although his name does not feature in Issue 223.