He then studied business and economics at the National Institute of Higher Education in Limerick, and worked afterwards in the manufacturing industry.
He subsequently attended seminary for the Diocese of Killaloe at St Patrick's College, Maynooth, and was ordained to the Catholic priesthood on 15 June 1991.
[4] Nash's first pastoral assignment was as chaplain of the vocational school in Roscrea, and as priest responsible for the local youth centre.
After five years, he was appointed as general manager of Clarecare, a non-profit enterprise which provides a range of social services to people in County Clare, a position he held until 2003.
He remained as resident priest in the newly created Imeall Bóirne pastoral area when he moved to Crusheen in 2007.