John is a writer and a composer. He co-wrote the top 5 selling album Seven Years Ten Weeks in 2003. He is one of the Kielty Brothers who wrote the opening number for the 2014 Commonwealth Games. They have written several award winning musicals: Sundowe (Winner of Cameron Mackintosh's Highland Quest 2008) Greyfriar's Twisted Tales (Spirit of the Fringe 2008) Mercy Madonna of Malawi (Spirit of the Fringe/UNESCA Festival of Light 2009) and a trilogy of musicals for the Royal Conservatoire of Scotland: Confessions of a Justified Songwriter, Active Virgin and Wasted Love (Best Lyrics MTM Awards plus nominations for Best Score, Book and Best New Musical.)
They also created the hit musical The 27 Club St Pauli Theatre, Hamburg and contributed several songs to Glasgow Girls National Theatre of Scotland.
Currently he is developing a new piece about the first female medical students: The Edinburgh Seven and developing Wasted Love for TV.
Recent Theatre Scores include: The Belle's Stratagem Royal Lyceum Theatre Edinburgh The Cone Gatherers His Majesty’s Theatre, Aberdeen Cinderella 2 Oran Mor Ma Bit Toonspeak Tin Forest: Ash and Ember National Theatre of Scotland The Satire of the Three Estates A&BC Productions Educating Agnes Theatre Babel Aladdin, Lovers, Sleeping Beauty Cumbernauld Theatre Merlin The Magnificent Royal Lyceum Theatre Edinburgh Why Do You Stand There in the Rain Pepperdine University Medea's Children Lung Ha Theatre Company / Unga Klara.