| Since 1997 | crc4change, Lausanne |
| 1991-97 | Research assistant at the Institute for Agricultural Economics, ETH-Zurich |
| 1988-90 | Head of the Crop Production Department, Prometerre, Lausanne |
| 1987-88 | Project manager, Prometerre, Lausanne |
| Europe | Switzerland |
| Africa | Benin, Burkina Faso, Cameroon, Ethiopia, Ivory Coast, Mali, Mozambique, Senegal, Sierra Leone |
| South America | Haïti |
| Central Asia | Kyrgyzstan, Tajikistan, Uzbekistan, Kazakhstan |
| Caucasius | Armenia |