The son Auburn, New York Police Captain John L. O’Brien, William O’Brien graduated from Saint Mary’s Catholic Elementary School in 1924, and then Saint Andrews Preparatory School. He then attended Saint Bernard’s Seminary in Rochester, New York, graduating in 1935. He was ordained a Catholic priest at Saint Patrick’s Cathedral, also in Rochester in June 1935, and entered the Diocese of Rochester. He became pastor of Corpus Christi Church in Rochester from 1935 to 1942, and then entered military service and was commissioned a U.S. Army chaplain. After his war-time service he returned to Corpus Christi Church where he served from 1946 to 1955. He then became pastor of Saint Patrick’s Church in Moravia, where he served until his retirement from active ministry in 1968.



