Warren is an Anglican Priest, having been ordained in 1989. Soon after being ordained he completed doctoral studies in Theology through Flinders University. He has since served in a variety of positions in Adelaide and rural SA.

Warren is currently the parish priest of Hawthorn, a St John’s Grammar parent, and former chaplain of the Secondary Campus. Warren thinks the Christian values of the School provide an excellent context for character development of the students and believes the pastoral care of the students at St John’s Grammar is excellent. He hopes to contribute to the continuing excellence of St John’s Grammar through membership of the Board.