Matthew has been a part-time CPTer since 1998. In addition to participating in CPT teams and delegations in Iraq, Chiapas, Esgenoopetitj, and Ontario, Matthew has been actively involved in a variety of local peace and justice activities in the Kitchener-Waterloo area. In recent years, he worked as an associate pastor of a Mennonite church, completed a Master's degree in Peace Studies, and taught an undergraduate course on the history of peace movements.