Kirk is a published playwright, director and producer who has worked in theatre for the past forty years. He has also taught at degree standard and has written over one hundred and fifty plays, several musicals and a number of large cast farces and revues.

As Writer and Artistic director of the Market Theatre, he has written and directed over 100 plays at this unique venue, since its creation in 1996. Most recently; The Set Up, The Air Raid, Marry Me or Be Evicted and The Emperor's Newd Clothes. The latter being one of the now infamous Adult Panto’s which are touring the country as well as playing to full houses at the Market Theatre. Other writing credits include ‘Rory Mechanic and the Dipsticks, WW2 in 50 Minutes, Classic Farce, Do you remember the early 50’s?, Knock Knock You’re a Star, Our Jack, Duck Down City’ (to name but a few) all for Back to Front Theatre Company. Also, Kirk’s musical, ‘First Time’, was published by Samuel French.

Recently he has written several historical one-handers such as Florence Nightingale for Jacqui Roberts, Nell Gwyn for Carrie Laurence, Joan of Arc for Davina Dewrance and Queen Victoria for Sheena Boyce. These Market Theatre actors have subsequently taken their respective shows on tour.

He was Co-Founder of HTS (Hertfordshire Theatre School) which he founded in 1988 with John Gardiner, eventually taking over as Principal in 2000. As principal and head of acting, he often directed many of the shows at the school as well as directing the 3rd Year’s Showcase each year at the Fortune Theatre in London.

He now concentrates solely on the Market Theatre, due to the venue’s ever growing popularity and the extra workload generated by an ever increasing tour schedule.

In 2004 Kirk was honoured to be elected a fellow of the Royal Society of Arts.