Joseph John Caddy was born on 14 January 1960, the first of six children to John and Patricia (née McMahon) Caddy who are both still living in the family home in Ivanhoe East where he was raised with his siblings Gerard, Anita, Delia, and Julian (all still living within the Archdiocese of Melbourne).
He had a Catholic education attending St Stephen’s Primary School in Reservoir East and then Cathedral College, East Melbourne and Parade College Bundoora for his secondary schooling under the guidance of the Christian Brothers.
Following his secondary education, he was accepted into the Commerce Faculty at the University of Melbourne before entering Corpus Christi College Seminary at Clayton, Melbourne in 1984. In 1988, he was awarded the degree of Bachelor of Theology by the Melbourne College of Divinity.
After ordination in 1990, Father Caddy was appointed, Assistant Priest at Our Lady of Perpetual Help, Maidstone until 1993 when he went to Rome to study for a Baccalaureate and later a Liceniate in Social Sciences at the Pontifical Gregorian University.
On completion of his studies in Rome, Father Caddy returned to Melbourne where he served in a number of diocesan and national roles in social services. He was Chair of Catholic Social Services Australia from 2003 until 2013; served as a Prison Chaplain in Melbourne’s maximum security men’s prisons for eleven years from 2002 and held the role of Chief Executive Officer at CatholicCare Melbourne from 2004 to 2017.
In 2013, while continuing in the role of CEO at CatholicCare, he was appointed Parish Priest of All Saints Fitzroy where he remained until 2016 when he was appointed Parish Priest of St Mary’s, St Kilda East and Episcopal Vicar for Social Services and Justice. In 2019 he was appointed Vicar General in the Archdiocese of Melbourne and in 2021 Parish Priest of St Carthage’s Parish, Parkville while continuing in the role of Vicar General
In June 2018 Father Caddy was recognised in his appointment as a Member of the Order of Australia for “significant service to the community through a range of social welfare initiatives and policy reforms, and to the Catholic Church in Australia”
In June 2024 he was nominated by Pope Francis as the Bishop-elect for the Diocese of Cairns.