Professor og Soil Science. Norwegian University of Life Sciences

Teagasc

Department of Biology, University of Eastern Finland

Wondo Genet College of Forestry and Natural Resources, Hawassa University, Ethiopia

Researcher, National Institute for Space Research (INPE)

Ph.D of Root Biology Center, South China Agricultural University

Manaaki Whenua - Landcare Research

University of Vienna

UMB

Swiss Federal Laboratories for Materials Science and Technology