Rob Cross is an associate professor at the McIntire School of Commerce at the University of Virginia, where he specializes in organizational behavior. Professor Cross directs research into social network analysis for The Network Roundtable, a consortium of 100 organizations. Jean Singer is an organizational consultant specializing in the use of social network principles and techniques to drive performance. Sally Colella works with leaders and teams to create and leverage networks that support learning, results, and satisfaction. Robert J. Thomas is the executive director of Accenture's Institute for High Performance and a professor at the Brandeis University International Business School. Yaarit Silverstone is the managing director responsible for organization effectiveness offerings and capabilities within Accenture's Talent and Organization Performance practice.