He was director of the London Mennonite Centre in England (1991-1996) and president of Anabaptist Mennonite Biblical Seminary (1997-2009) in Indiana. With a doctorate in NT from Presbyterian Theological Seminary in Virginia, he is author of several books, including APOCALYPSE AND ALLEGIANCE: WORSHIP, POLITICS AND DEVOTION IN THE BOOK OF REVELATION (Brazos, 2010). He is President of Mennonite World Conference, and leads tours to Bible lands.