Dyer has been on the Chico's board since 2007, and previously served as president/CEO of both Tommy Hilfiger and Land's End. The Ft. Myers, Fla.-based retailer--which targets older women and has been worn by such notables as Michelle Obama and Debbie Phelps, mother of swimming phenom Michael--says its comparable-store sales fell 12.4% in December.--Sarah Mahoney