49. Protiviti Growth Rate: 65% HQ: Menlo Park, Calif.
Protiviti is a global consulting firm helping companies solve problems in finance, technology, operations, governance, risk and internal audit, and has served more than 60 percent of Fortune 1000 and 35 percent of Fortune Global 500 companies. Protiviti and its independently owned member firms serve clients through a network of more than 70 locations in over 20 countries. Joseph Tarantino, President & CEO of Protiviti, sat down to discuss the firm's financial performance.