Born: 30 June 1920, Marlborough Street, Derry, County Derry
Entered: 07 September 1939, St Stanislaus College, Tullabeg, County Offaly
Ordained: 29 July 1954, Milltown Park, Dublin
First Final Vows: 02 February 1957, Belvedere College SJ
Died: 29 October 1994, Calvary Hospital, Adelaide, Australia (priest of Catholic Archdiocese of Adelaide)

Left Society of Jesus: 1993 for Adelaide Diocese

Older brother of Louis J O'Brien - LEFT 11 September 1945 and Vincent A O'Brien - LEFT 27 February 1948

Father was the Cathedral Organist and Professor of Music at the Diocesan College Derry, and then became the Director of The Municipal School of Music, Chatham Row, Dublin, and organist at St Francis Xavier’s Church, Gardiner Street. Family moved in 1930 to Merrion Road, Dublin.

Oldest of seven boys and two girls.

Early education was at a Convent school in Derry and then at St Columb’s College Derry. When they came to Dublin he went to Blackrock College CSSp,. On the advice of Father Kirwan SJ he then went to Belvedere College SJ in 1937.

1966/1967 Corpus Christi, Australia
by 1985 working in Catholic Archdiocese of Adelaide, Australia