MAGGIE GERSON AND CATHY SCHROEDER have been named by Senate Minority Leader Lauren Book, D-Plantation, to top positions with the Senate Democratic office. Gerson, who will serve as staff director, has served as chief of staff to Sen. Jason Pizzo, D-North Miami Beach. Schroeder, who will serve as deputy staff director, has held positions such as vice president of public affairs for BowStern Marketing Communications.