- 1996 - 1997 建設省土木研究所環境部地質研究室研究室長
- 1996 - 1997 Geology Division, Department of Environment, Public Work Research Institute, Ministry of Construction, Division Director
- 1993 - 1996 水資源開発公団試験研究所土質地質研究室室長
- 1993 - 1996 Soil Mechanics and Engineering Geology Division, Research Institute, Water Resources Development Public Corporation, Division Director
- 1984 - 1988 建設省土木研究所地質化学部地質研究室主任研究員
- 1984 - 1988 Public Work Research Institute, Ministry of Construction, Senior Researcher
- 1983 - 1984 ニュージーランド地質調査所地質工学研究室在外研究員
- 1983 - 1984 New Zealand Geological Surver, Department of Scientific and Industrial Research Institute, Researcher
- 1979 - 1984 建設省土木研究所地質化学部地質研究室研究員
- 1979 - 1984 Geology Division, Department of Geology and Chemistry, Public Work Research Institute, Ministry of Construction, Researcher
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