A joint German-Indonesian research programme is focussing on technology and capacity building to support the geothermal energy development in Indonesia. The exploration research team investigates the exemplary geothermal region of Sipoholon (northern Sumatra). A wide range of methods such as structural geology, seismology, magnetotellurics and near-surface seismics is applied in an integrated approach to explore the geothermal potential and to derive a conceptual model of the target region.