John H. "Jack" Zenger is the co-founder and chief executive officer of Zenger Folkman, a professional services firm providing consulting and leadership development programs for organizational effectiveness initiatives. He is a world expert in the field of leadership development, and is a highly respected and sought after speaker, consultant and executive coach

In 1977, he co-founded Zenger-Miller and served as its president and CEO until 1991. The Wall St. Journal named it one of the 10 best suppliers of executive development. He later became the president of Provant, a publicly traded combination of 21 companies in the training industry.

From 1966 to 1977, Jack was vice president of human resources for Syntex Corporation, and from 1992 to 1996, was a group vice president of the Times Mirror Corporation.