He is also the editor of "Fealsúnacht, Feall agus Fuil" which is a collection of historical essays concentrating on the 1798 Rebellion and several pamphlets on aspects of Irish republican history. He is a member of the board of the Ireland Institute, aimed at promoting discussion on Irish republicanism, culture and heritage which restored the Pearse brothers' birthplace and original family home at 27 Pearse Street, Dublin, and joint editor of the Institute's journal, "The Republic". Ó Snodaigh is the brother of the three Ó Snodaigh brothers in the band Kíla, and is the son of the writer and publisher Pádraig Ó Snodaigh and the sculptor Clioḋna Cussen from Newcastlewest, County Limerick. He is married to Aisling Ní Dhálaigh; they live in Bluebell with their three children. He also worked as a journalist, book reviewer and proofreader for "An Phoblacht" newspaper. In one incident a book-bomb was sent to the office by Ulster loyalist paramilitaries and he carried the device outside the building, where it exploded a short time later, injuring two soldiers.