Arty Tan, formerly of Ground Zero, has joined Deutsch/L.A. as a VP-associate creative director. Meanwhile, senior copywriter Martin Dix has been promoted to VP-ACD. ... Rodd Isberto, formerly a group creative director at Minneapolis agency The Foley Group, has joined Campbell-Mithun as a VP and creative director. ... Director Aaron Ruell, who played the title character's older brother "Kip" in Napoleon Dynamite, has signed with Santa Monica production company Area 51 for video and commercials representation.