Mr. Sambo LUN is registered as a Ph.D. student at the University of Tokyo in the Department of Environment Systems. He is conducting research on the interaction of groundwater and surface water by applying isotope tracing and hydrometric approach under the supervision of Prof. Tokunaga Tomochika in the Geosphere Environment Systems Laboratory. In addition, Sambo got a degree in rural engineering, from the Institute of Technology of Cambodia (ITC), specializing in water resources and infrastructures and he got a master of geological engineering from the University of Gadjah Mada in Indonesia in the division of Geo-Resource and Geo-Hazard Management relating to flood, drought, and landslide. Mr. Sambo has been actively working as a consultant on the water supply sector for AusAID, AFD. In addition, he involved in full project proposal development for MOWRAM applying for CCCAII (UNDP-project). He also experienced with Water, Sanitation, and Hygiene (WASH) some NGOs such as SNV, FRC.