What: CEO Where: PJA Advertising+Marketing, Cambridge, Mass. Why: PJA grew its revenue by 5% last year and picked up such new clients as Bio-Rad Laboratories, Enterasys, EvaluatePharma, Hitachi Data Systems, Iron Mountain, Meru Networks and Novaris. Its leading campaigns included “Whose Side Is Your Printer On?” for Brother; “We’re in It” for TE Connectivity; and “Stop Faking It” for Limelight Networks.