1963/ 1965 Soil mechanics laboratory - 1965 /1970 Saudi Arabia -1970/1 - 1971/1973 Uganda, Kenya, Mozambico - 1973/1975 Cuba - 1975/1981 Nigeria - 1981/1982 Madagascar - 1983/1988 Italy (Milan's Polytechnic) , Greece, Nigeria, Sri Lanka, Angola 1988/2001 general partner of Geosoft s.a.s - 2001/2016 senior consultant