Archbishop Timothy Costelloe SDB was born in Melbourne on February 3, 1954, the second son of Francis John (Jack) and Carmel Tasma Costelloe (nee Roadknight). He was educated at Saint Peter’s parish primary school, East Bentleigh and at Salesian College, Chadstone, from where he matriculated in 1971.
After several employment positions he commenced studies in a teacher training course at Christ College in Melbourne, which he interrupted in 1977 to join the Salesians of Don Bosco. He made his first profession as a Salesian on January 31, 1978 and graduated from Christ College at the end of that year.
In 1985 he made his Final Profession as a Salesian of Don Bosco and was ordained to the Priesthood by Archbishop Sir Frank Little on October 25, 1986.
After three years as Religious Education Coordinator at Salesian College, Chadstone, he was transferred to Rome where he completed a Licentiate in Sacred Theology at the Salesian Pontifical University in 1991. Upon returning to Melbourne he began lecturing in Systematic Theology at Catholic Theological College in Melbourne and worked in the area of the formation of young Salesians.
In 1996 he was transferred to Perth where he was appointed parish priest of Saint Joachim’s, Parish, Victoria Park, and lecturer in theology at the University of Notre Dame Australia, Fremantle. He completed his doctorate in theology from the Melbourne College of Divinity at this time.
In 1998 he attended the Synod for Oceania in Rome as the theological adviser of Archbishop Barry James Hickey.
Returning to Melbourne in mid-1999 he was appointed as Rector of the Salesian formation community in 2000 and resumed teaching commitments at Catholic Theological College. In addition to these duties he was appointed as parish priest of Saint John the Baptist Parish, Clifton Hill, in 2006 and as parish priest of the adjoining parish of Saint Joseph’s, Collingwood in January 2007. He was a member of the Provincial Council of the Salesians from 2002 to 2007, Provincial Delegate for Formation in the Australian Province from 2003-2007, and was appointed as Regional Delegate for Formation for the East Asia-Oceania Salesian region in 2006.
Archbishop Costelloe was appointed Titular Bishop of Clonard and Auxiliary Bishop of Melbourne on April 30, 2007 and ordained a bishop on June 15, 2007.
As an auxiliary bishop in Melbourne, Archbishop Costelloe was given the responsibility for the northern region of the Archdiocese, was the Episcopal Vicar for Tertiary Education, Chair of the Catholic Education Commission of Victoria, Chair of the Mannix College Council, Chair of the Steering Committee for the Catholic Leadership Centre, Chair of the Advisory Board of the Archbishop’s Office for Evangelization and the Archbishop’s delegate for Youth Ministry in the Archdiocese of Melbourne. He was also an Adjunct Professor at the Australian Catholic University.
On February 20, 2012, Pope Benedict XVI appointed Archbishop Costelloe as the ninth Bishop and sixth Archbishop of Perth. He was solemnly installed as Archbishop of Perth on 21 March, 2012.
In the Australian Catholic Bishops Conference, Archbishop Costelloe is a member of the Permanent Committee, the Bishops Commission for Doctrine and Morals and the Bishops Commission for Catholic Education.