John J. "Jack" Sheehan (born August 23, 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).
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.
He served in various command positions ranging from company commander to brigade commander in both the Atlantic and Pacific theater of operations. General Sheehan’s combat tours include duty in Vietnam and Desert Shield/Desert Storm.
Jack Sheehan (29 May 1890 – 17 June 1933) was a former Australian rules footballer who played with the Collingwood Football Club and Richmond Football Club in the Victorian Football League (VFL). He was also listed with the Melbourne Football Club, but never played a game.
John Thomas Sheehan (April 15, 1893 in Chicago, Illinois – May 29, 1987 in West Palm Beach, Florida) was a professional baseball player who played infield for the Brooklyn Robins in the 1920 and 1921 baseball seasons. He attended college at Fordham University.
He later managed in the minor leagues during 1916–1953. After that, he became a scout, serving as Scouting Director for the Washington Senators in the 1960s.