TRACY WONG has joined Horizon's Los Angeles office as planning group head. He comes to Horizon from RPA where he served as associate media director. JERRI DICKERMAN has been promoted to broadcast group manager in Horizon New York's Local TV department, up from senior buyer. Dickerman joined Horizon five years ago from Grey Advertising. EVELIZA JIMENEZ has been promoted to broadcast group manager in Horizon New York's Local TV department, up from senior buyer. MARGIE BENNETT has joined Horizon New York's local TV department as a senior buyer after freelancing at the agency for the past year. Prior to joining Horizon, Bennett was a local broadcast supervisor at MediaCom. JILL GOLDBLATT joins Horizon Media New York as media planner. Goldblatt joins Horizon from The Media Edge where she was a media planner working on Colgate Palmolive's soaps and deodorants account. NATALIE NOVAK has been promoted to account supervisor, up from account executive. Lastly, ADAM SWEET has been promoted from assistant buyer to a junior buyer in Horizon's Los Angeles office and ERICA AU has joined Horizon LA as an assistant TV buyer.