Johan joined ISRIC in 2009 as Soil Legacy Data Officer for the GlobalSoilMap.net, Africa Soil Information Service (AfSIS) and later the WoSIS projects. More recently, Johan is focusing his work at ISRIC on soil fertility projects. His expertise is in soil science, agriculture, geo-information and Africa. He graduated from Wageningen University in 1990 with a specialization in soil survey and land evaluation. Since he has been involved in projects on soil & land resources and worked for public organizations, commercial companies as well as freelance. The emphasis of his work has been on sustainable soil fertility management in semi-arid conditions and on watershed- and natural resources management, for which he conducted numerous land-use system analyses at various scales applying GIS, database and crop growth modelling. Johan has working experience in the Netherlands, Belgium, Jordan, Iran, Ethiopia, Kenya, Tanzania, Uganda, Nigeria, Ghana, Ivory Coast, Guinea, Senegal, Mali, Burkina Faso and Colombia. Johan speaks Dutch, English and French.