SFGT in Philadelphia has promoted account supervisor David Burden, 31, to account director and has hired Brian Sim, 22, as assistant account executive. Burden will continue to manage the Timberlane and IFCO accounts, now with Sim's assistance. Burden had previously managed the launch effort for the National Constitution Center and special projects for Tylenol, Metro Newspapers and Coca-Cola. Before joining SFGT in 2000, Burden had been online business manager at Global Commerce, King of Prussia, Pa. Prior to that, he had worked at Margeotes|Fertitta + Partners, New York. Sim is a recent grad of the Wharton School of Business at the University of Pennsylvania. SFGT's clients include the University of Pennsylvania Health System, Timberlane, Tylenol, De'Longhi, IFCO Systems and American Education Services.