Teng is from Camarines Sur. She became a missionary of NTMPI in 1995 and was assigned among the Subanen Tribe in Zamboanga Del Sur for 6 years. She has been working as a full-time teacher and staff at the New Tribes School of Missions from 2015 up to the present. She handles subjects such as Pentateuch, Principles in Teaching, and Biblical Counseling.