In 1978 Bill co-founded TDF Systems, a management consulting firm. He assisted in the development of TDF theory, a cognitive style theory that has been used widely for management training and for individual and organizational assessment. Bill has also worked in all phases of organization development and the management of change, with clients ranging from large national corporations to small entrepreneurial companies. He is particularly interested in helping organizations determine a clear direction for their future, in strategizing the steps to achieve their vision, and in identifying and removing those factors and conditions that may prevent achievement of the desired results.

In 1988, he became associated with JFA Consulting, Inc., and has worked closely with Jim Finley on the development of all the company's service offerings.