Williamson was born in
Nelson, but moved to Tauranga in 1993. He is the co-founder of Detour Theatre, a theatre company in Tauranga. He has been working full-time in theatre, and related industries, for over 17 years and is currently employed by the Detour Theatre Trust as a director and tutor. Williamson has a wife, Kim, who also directs for Detour Theatre, and two children. There have been over 50 theatre productions of Williamson's plays. Williamson's plays have been performed extensively throughout New Zealand by community theatre groups, as well as in Australia. In September 2015
The Old People Are Revolting will be performed at the Topeka Civic Theatre in the United States. == Work ==