Denis Nulty was born in Slane, County Meath on 7 June 1963 to parents Den Nulty and Nan Balfe. He is the youngest of five children, with two brothers and two sisters. The family farm was the home where Denis and his siblings were reared.

He attended Primary School at Saint Patrick’s National School, Slane and Secondary School at Saint Patrick’s Classical School, Navan, completing the Leaving Certificate exam in 1981.

Denis entered the seminary at Saint Patrick’s College, Maynooth in September 1981, completing a BA in 1984 and a BD in 1987.

He was ordained a Priest for the Diocese of Meath in Saint Patrick’s Church, Slane on 12 June 1988 by Bishop Michael Smith in the presence of Bishop John McCormack.

In September 1988 Bishop Smith appointed Father Denis as Curate in the Cathedral Parish at Mullingar where he served for ten years until 1998. In August 1998 Bishop Smith appointed Father Denis as Parish Priest of Saint Mary’s, Drogheda where he remained up until his Episcopal appointment to Kildare & Leighlin (August 2013)

In 2006 Father Denis followed a course of study in All Hallows College, Dublin, leading to an MA in Management for the Pastoral and Voluntary Services being awarded by DCU.

In September 2006 Bishop Smith appointed Father Denis as Vicar Forane for the Duleek Deanery which comprises seven parishes. Father Denis was Chairperson of the Council of Priests in the Diocese of Meath for past eight years prior to his appointment as Bishop of Kildare & Leighlin.

Bishop Denis Nulty was ordained Bishop of Kildare & Leighlin on 4th August 2013 in Carlow Cathedral and has served there since

On Tuesday 2nd February it was announced that Pope Francis had appointed him as Apostolic Administrator of Ossory. He takes up that role along with his Ministry in Kildare and Leighlin journeying with the people of Ossory until a new Bishop is Appointed.