Mario is the Executive Librarian in charge of Kildare Collections and Research Services for Kildare Library & Arts Services and has professional qualifications in History and Library & Information Science from U.C.D. He has written, edited and compiled many books, booklets and articles relating to County Kildare including, Hearth and Home: A history of social housing in Kildare Town 1889-2009, with James Durney and Joseph Connelly which won the Nilsson Local Heritage Publishing Award in Listowel Writer's Week in 2013. Mario has taught introductory genealogy courses as well as delivering many presentations, talks and walks on Kildare history and heritage. In recent years he has been involved in digitisation of Kildare source material including, the Kildare Archaeological Journals (DVD, 2009) and The Kildare Observer newspaper, 1880-1935, (online, 2010). He has also written a series of children's fiction books.