| 2004 - Present |
Research Assistant Professor Utah State University |
| 1998 - 2004 |
Assistant Research Scientist III University Of California, Riverside, USA |
| 1992 - 1998 |
Research Scientist University Of California, Riverside, USA |
| 1989 - 1991 |
Visiting Scientist U.S. Salinity Laboratory USDA-ARS, USA |
| 1984 - 1989 |
Research Assistant Conseio S. de Investigaciones Cientificas, Spain |
| 1983 - 1984 |
Teaching Assistant University Of Zaragoza, Spain |
| 1982 - 1983 |
Research Assistant Confederacion Hidrografica del Ebro, Spain |