John Hennessey lived a remarkable, full life as a professor, as a leader in his field of management and business, and moral, ethical leadership, and as dean at Dartmouth College's Tuck School of Business and provost at the University of Vermont. He was extraordinary on many fronts, a great man who lived in tumultuous times marked by world war as a young man, later as a graduate student and then professor and dean during the massive social and culture changes wrought by the 1960s and '70s. He was ahead of his times in ways that were noteworthy then, but now are even more so as we look retrospectively at his life. This article briefly presents the professional career of John Hennessey and how he enriched the halls of academe.