He was raised Roman Catholic until he joined the Worldwide Church of God in 1982. Don stayed in the Church of God until 1995, when the church leaders changed most of the central doctrines such as observance to the 10 commandments including the 7th day Sabbath, and the biblical Holy Days of Leviticus 23. Don was ordained a Pastor by a Church of God 7th day minister and has since had an independent ministry in over 30 countries.
Siya ay nanatili sa Church of God hanggang 1995, nang binago ng mga pinuno ng simbahan ang halos lahat na napakahalagang doktrina tulad ng pagsunod sa Sampong Kautusan kasama na ang Ikapitong Araw ng Sabado(ShaBBaTh), at ang biblical na mga Kapistahan sa Leviticus 23.