For the baseball player, see Jack Sheehan (baseball)
General John J. "Jack" Sheehan (born 1940) is a retired United States Marine Corps general. His final active duty commands, culminating 35 years of service in the Marine Corps, were as the Supreme Allied Commander Atlantic (SACLANT) for NATO and as Commander-in-Chief for the U.S. Atlantic Command (CINCUSACOM) (1994-1997).
General Sheehan was born on August 23, 1940, in Somerville, Massachusetts. The son of Irish immigrants he is one of seven children. He graduated with a B.A. degree in English from Boston College in June 1962. After graduation, he was commissioned a second lieutenant in the U.S. Marine Corps. He holds an M.S. degree from Georgetown University in Government. His professional military education includes the Amphibious Warfare School, Naval Command and Staff College, and National War College.