In 1985 Bishop Anthony entered the Order of Preachers (Dominicans), a religious congregation dedicated to preaching the Catholic faith in the context of a life of study, prayer and community. He studied for the priesthood in Melbourne, receiving an honours degree in Theology.
He worked for a time on immigration and refugee issues at Uniya, a centre for social research in Kings Cross, and was ordained a priest at Holy Name Parish, Wahroonga, on 14 September 1991.
Thereafter, Bishop Anthony completed a Doctorate in Bioethics at the University of Oxford. From 1995 to 2000 he was a lecturer in the Australian Catholic University.
From 2000 to 2003 he was foundation Director of the John Paul II Institute for Marriage and the Family, Melbourne. Bishop Anthony remains Professor of Moral Theology and Bioethics in the Institute.
During this time he was also Master of Students (seminarians) in the Dominican Order and Socius (deputy) to the Provincial.
His community involvements included being Chaplain to the Parliament of Victoria; member of the Infertility Treatment Authority of Victoria; chair or member of several hospital ethics committees; and chaplain to various organisations such as the Order of Malta. He has published extensively in bioethics and moral theology.