David H. Maister, one of the world's leading authorities on the management of professional service firms, is the author of several successful books, including Managing the Professional Service Firm, True Professionalism, and Practice What You Preach, and coauthor of The Trusted Advisor.

Charles H. Green is an executive educator and business strategy consultant to the professional services industry. Charlie has taught in executive education programs for the Kellogg Graduate School of Management at Northwestern University, and for Columbia University Graduate School of Business, as well as independently through his firm, Trusted Advisor Associates. His current work centers on the nature of trust-based relationships within organizations, and on the management of professional service firms. Green is a graduate of Columbia and  Harvard Business School. He spent the first twenty years of his career with The MAC Group and its successor, Gemini Consulting, where his roles included strategy consulting (in Europe and the United States), VP Strategic Planning, and a variety of other firm leadership roles. He is the author of numerous papers, with articles published in the Harvard Business Review and Management Horizons. He is president of Trusted Advisor Associates, which he founded with Rob Galford. He resides in Morristown, New Jersey.

Robert M. Galford is currently a Managing Partner of the Center for Executive Development in Cambridge, Massachusetts, and was formerly the executive vice president and chief people officer of Digitas, Inc., a leading Internet professional services firm with over 1,400 employees. He taught for many years on executive programs at the Columbia Graduate School of Business and the Kellogg Graduate School of Management at Northwestern University, in addition to consulting to professional services firms, technology companies, and financial institutions. Rob has lived and worked in both Western Europe and North America as a vice president of The MAC Group and its successor firm, Gemini Consulting. He has practiced law with the international firm of Curtis, Mallet-Prevost, Colt & Mosle in New York and Washington, and has also worked in investment management for Citicorp. Rob's writing and commentaries on management have been published in the Boston Globe and he is a three-time contributor to the Harvard Business Review. He currently sits on the boards of directors of Forrester Research, Inc., and Access Data Corporation. He also hosts the business video Talk About Change! with the popular cartoon character Dilbert.