Momentum Worldwide, part of Interpublic’s McCann Worldgroup, has appointed Matthew Gidley as its new Managing Director for the agency’s Chicago office. Most recently Director of Insight & Strategy at Momentum UK in London, Gidley—already a member of the agency’s Executive Leadership team—is charged with the growth of the Chicago office, and with ultimate oversight of partnerships with leading brands including the U.S. Army, Mondelez International, United Airlines, among other clients. Gidley will report directly to EVP Regional Director, North America Donnalyn Smith and will begin his new position in January. Gidley has been with Momentum since 2009. Prior, he was a Head of Creative Strategy within Interpublic Group’s Team Nokia, helping create the award-winning branded films The Fourth Screen and Days of Change. Other assignments included Thomson Reuters, Zain and Proctor & Gamble.