The Harpers have been missionaries with ACTION since 1994. George teaches church history and historical theology. Anne teaches courses on missions and spiritual formation.
Both George and Anne teach and have administrative roles at Asia Graduate School of Theology - Philippines (AGST). The AGST is a consortium of nine evangelical seminaries, most of them located in metro Manila, that are affiliated with the Asia Theological Association. Its member schools have a combined enrollment of about a thousand. They collaborate to offer advanced degrees like the Th.M., D.Min., D.Miss., Ed.D., and Ph.D. For these programs they draw students not only from their own schools but from across East and South Asia, including closed countries within the "10-40 Window" like Myanmar and Nepal. The AGST is helping to train a new generation of faculty members for Asian seminaries and Bible colleges who will in turn train a new generation of pastors, evangelists, and church workers to serve Asia's rapidly growing Christian community.