Bill Byham is Founder and Executive Chairman of Development Dimensions International (DDI), an internationally renowned human resource training and consulting company. An Industrial/Organization Psychologist, Bill has developed many significant human resource technologies over the course of his career.

These innovations include the assessment center method, behavior-based interviewing, the use of behavior-modeling in supervisor and management training, behavioral job analysis methodology as the basis for selection and training programs, and Acceleration Pools® to select and rapidly develop people for high-level leadership positions.

These technologies have been described in 23 books and more than 300 monographs and articles. In addition, he has appeared on numerous radio and TV programs through the world.