Austin's GSD&M promoted David Parson, formerly an associate creative director on accounts including Southwest Airlines, Land Rover and AT&T, to creative director. ... Pittsburgh's Blattner Brunner added Jeffrey Maggs as senior vice president and director of account management. ... Producer Melody Sylvester, most recently freelancing for White House Pictures and Airside, joined London's Nexus Productions as a producer. ... Director/cinematographer Marcus Stevens joined bi-coastal The Joneses for exclusive commercials representation. ... Detroit's Global Hue Advertising added Derik Parrent, formerly of Colby & Partners and Saatchi & Saatchi as senior broadcast producer.