Catholic Chaplains Monument - Chaplains Hill, Arlington National Cemetery - Medal of Honor
Captain Joseph T. O'Callahan Joseph Timothy O'Callahan was born in Boston, Massachusetts, on 14 May 1905. He joined the Jesuit Order of the Roman Catholic Church in 1922, after graduation from preparatory school, and subsequently received degrees from several institutions of higher learning. He was ordained in 1934, and was a Professor of Mathematics, Philosophy and Physics at Boston College in 1929-37, Professor of Philosophy at the Jesuit Seminary of Weston College in 1937-38 and Director of the Mathematics Department at Holy Cross College, Worcester, MA. Father O'Callahan was commissioned as a Lieutenant (Junior Grade) in the Naval Reserve Chaplain Corps in August 1940. He was assigned to the Naval Air Station, Pensacola, Florida, in 1940-42, to the aircraft carrier Ranger in 1942-44 and to the Naval Air Stations at Alameda, California, and Pearl Harbor, Hawaii, into early 1945. Lieutenant Commander O'Callahan joined the the aircraft carri