Prof. S. Majid Hassanizadeh is a Fellow of American Geophysical Union (Elected in 2002). Currently Professor of Hydrogeology at the Faculty of Geosciences of Utrecht University, his work experience includes: Assistant Professor with the Abadan Institute of Technology (Iran, 1979-1982), Project Manager with the Yekom Consulting Engineers (Iran, 1982-1984), Assistant Professor with the Technical and Engineering University of Tehran (Iran, 1982-1984, part-time), senior researcher with the National Institute of Public Health and Environment, RIVM (Bilthoven, The Netherlands, 1984-1995), guest Assistant Professor with the Department of Geology of Utrecht University (The Netherlands, 1990-1994), Associate Professor (1995-2001) and later Professor (2001-2003) with the Faculty of Civil Engineering and Geosciences, Delft University of Technology. More than 100 publications in journals, books, conference proceedings, or as technical reports. Editor of Advances in Water Resources from 1991 till 2001 and now on the editorial board of Transport in Porous Media, Vadoze Zone Journal, and Advances in Water Resources. Member of American Geophysical Union, Soil Science Society of America, European Geophysical Union, International Association of Hydrological Sciences, International Association for Environmental Hydrology, and The Netherlands Hydrological Society. He has (co)organized 6 international workshops, 3 international conferences, 6 international short courses, and has been member of scientific committees of 19 international conferences.