Tribal DDB appointed former JDK interactive director Thomas Tafuto as executive creative director of its Dallas office. ... R/GA named Chloe Gottlieb as executive creative director of interaction design. ... Lydia Snape returned to integrated agency Renegade to take on the new position of senior VP/digital development director. ... Annabel Jankel signed with Saville Productions for exclusive North American representation. ... Digital studio Radium added Paul Abatemarco as head of sales. ... New York design/animation studio FlickerLab promoted Franklin S. Zitter to producer. ... Asylum and Kommitted Films secured independents Charlie McBrearty and Vanessa McLean of Shortlist for West Coast representation.