Gareth is Artistic Director of the Traverse Theatre. For the Traverse, his shows include So Young by Douglas Maxwell, JACK by Liam Moffat, The Grand Old Opera House Hotel by Isobel McArthur, Wilf by James Ley, Still by Frances Poet, Crocodile Fever by Meghan Tyler, Ulster American by David Ireland.

Other productions include: Kidnapped by Isobel McArthur (National Theatre of Scotland), Trainspotting by Irvine Welsh, Blackbird by David Harrower, Into That Darkness by Gitta Sereny, Vanya by Sam Holcroft (Citizens Theatre); God Of Carnage by Yasmina Reza, A Gamblers Guide To Dying by Gary McNair (Show & Tell).

His work has toured extensively across the UK as well as transferring to Australia, New Zealand, Ireland and USA.