Mulholland moves from Wunderman London, where he was the creative director on Xbox and Motorola. His career also includes stints at JWT and Agency.com. His appointment ends a 12-month search for a creative director since the agency was formed by a management buyout from HHM.
Omaid Hiwaizi, the Crayon partner, said: "We took our time to find the right person, with core experience in direct marketing but abilities in online and advertising, reflecting the output of Crayon. Steve had that, and the spunky attitude the kids here have."