Ronan is based in Edinburgh and writes plays for the professional stage and community groups. He also writes short films.
In 1998 his first play The Chic Nerds was produced by The Traverse Theatre. In 2002 Spambam was produced by LookOut Theatre company. It toured Scotland and was produced in Sydney and at the Melbourne Festival in 2003. In 2003 he wrote a new Scots translation of Aristophanes' Lysistrata which was performed by Common Force Community Theatre. In 2004 for the same company he wrote The Ned's Lament, based on John Gay's Beggar's Opera, which had a revival at the Brunton in 2014. Also in 2003 Brazil was produced by Theatre of Imagination and had a run at the Latchmere in London. In 2004 he wrote a version of Beijing playwright Xiaoli Wang's In the Bag for the Traverse. In 2005 The Doll Tower, a play based on the life of T.E. Lawrence and his Scottish bodyguard John Bruce, ran in Liverpool at the Unity Theatre. In 2011 Angels was produced at Oran Mor in Glasgow. Angels was nominated for best new play for that year and ran at the Traverse during the 2012 festival. In 2012 he wrote the screenplay The Wayward Wind, a community project for older people in East Lothian.
He has written short film scripts, Daydream in the Honest Toun (2011) and Swimming at Sangin (2010). His Scottish Gothic play The Sin-Eaters had a reading at the Tron in April 2014.