Experience on the conduction of ground survey works such as surface mapping, borehole logging, test pits, dynamic probing test, seismic refraction and resistivity profiles for hydraulic, roadway and railway geotechnical designs. I have also experience in site characterization and supervision works for rock and soil foundations (direct and pile foundations) and stability assessment of rock cuts and natural slopes.Geological and geotechnical mappings for open pit and underground excavations and established the outline of improvement measures of several foundation surfaces. Conduction of with site rock characterization and assessment (RMR, GSI and Q-Barton) for geotechnical design of slopes and underground excavations and their support systems.