| Swedish University of Agricultural Sciences | Uppsala Municipality, Uppsala County, Sweden | (2011—) |
| University of Copenhagen | Copenhagen Municipality, Capital Region of Denmark, Denmark | (1997—1999) |
| University of Wisconsin–Madison | Madison, Dane County, USA | (1988—1991) |
| Consultative Group on International Agricultural Research (US) | Washington, D.C., District of Columbia, USA | (2010—2011) |
| International Maize and Wheat Improvement Center | Mexico | (2004—2010) |
| International Institute of Tropical Agriculture | Nigeria | (2001—2004) |
| International Crops Research Institute for the Semi-Arid Tropics | India | (1999—2001) |
| International Institute of Tropical Agriculture | Nigeria | (1992—1996) |
| Rutgers University–New Brunswick | New Brunswick, Middlesex County, USA | (1991—1991) |
| International Potato Center | Lima, Lima province, Peru | (1984—1988) |
| National Agrarian University | Lima, Lima province, Peru | (1984—1984) |
| National Agrarian University | Lima, Lima province, Peru | (1982—1983) |