Jon and May are serving with NTMPI for three decades now. They first worked as missionaries among the Bugkalot Tribe of Quirino and Nueva Vizcaya provinces for five years. Jon was involved in teaching and training the Bugkalot church elders while May was involved in providing medical help for the people and teaching women, young people, and children. They served in Thailand from 2000 to 2004, then returned to the Philippines when Jon was called to be part of the leadership team. He became Chief Executive Officer for eight years, then assumed other leadership positions since then. Currently, he is the National Director and Training Program Director of NTMPI. Jon and May are also part of the teaching staff at NTSM. Their only child, Janric, is already married.