John Adair (author) at the University of Exeter from 1990 to 2000. He is currently an Emeritus Fellow of the Windsor Leadership Trust where he regularly speaks on Leadership development programmes. Since 2006, he has been Honorary Professor of Leadership at the China Executive Leadership Academy in Pudong. In 2009 he was appointed Chair of Leadership Studies United Nations System Staff College in Turin. He is President of Adair International. John Adair (author) Professor John Eric Adair (born 18 May 1934) is a British academic who is a leadership theorist and author of more than forty books (translated into eighteen languages) on business,
Mark L. Hersey of the Spanish–American War and served as a quartermaster for the 12th Infantry in the Fifth Army Corps in the Santiago Campaign. Hersey was promoted to captain in 1899 and served as part of the China Relief Expedition during the Boxer Rebellion. In 1902 he received a Master of Arts degree from Bates College. Following the Philippine Insurrection, Hersey served as a colonel with the Philippine Constabulary for ten years. Hersey was promoted to major in 1911 and to lieutenant colonel in 1916. He served under General John J. Pershing during the punitive expedition in Mexico in 1916. Hersey was