Dan Ramadhan Achmad was born in Bandung September 29, 1974. Dan has finished his bachelor degree in the Department of Engineering Geology Institute of Technology Bandung in 1998. He continued his studies in the same department for master degree and completed in 2006. The thesis discusses the water catchment areas in the geothermal field at Malabar Pangalengan West Java, by combining water balance method with geological and hydrogeological studies, so that the conclusions obtained the large volume of water that seep into the ground. Based on the geological interpretation, the pattern of groundwater flow can be modeled qualitatively. Dan has been involved in various projects related to geology, hydrogeology, and geothermal in various institutions