Dermot Pius Farrell is the Bishop of Ossory in Ireland.
He was born in Castletown-Geoghegan, County Westmeath on 22 November 1954.
He was educated at St Finian's College, Mullingar and St Patrick's College, Maynooth.
(earning an honours BSc in 1976 in mathematics and physics).
Now known as Maynooth University, St Patrick's houses both the Pontifical University and the National Seminary for Ireland.
Ordained priest on 7 June 1980, Farrell undertook postgraduate studies in theology at Maynooth.
He spent 7 years as curate in Mullingar from 1981.
In 1985 he went to Rome to complete his doctorate at the Gregorian University, while serving on the staff of the Pontifical Irish College.
On his return to the Diocese of Meath in 1988, he was appointed curate in Tullamore.
In 1990 he was appointed to the Faculty of Theology at St Patrick's College, Maynooth.