LOS ANGELES: Fifteen Minutes has promoted Bill Harrison to president and COO. Howard Bragman, who founded the firm in 2005, will assume the title of chairman and CEO. In his newly heightened role, Harrison will continue to head the agency’s corporate entertainment division, as well as add overall management responsibilities. He will also work with Bragman on new business development and long-term planning. Prior to joining LA-based Fifteen Minutes, Harrison held positions at boutique talent agency Paradigm, and PR firms PMK/HBH and Zukerman Communications.