From 1989 to 1990 he worked as postdoc at the University of Arizona and returned 1990 to a junior professorship in Lund.
From 2001 he was Professor and Head of the Chemical Ecology department at the Swedish University of Agricultural Sciences (SLU) in Alnarp, Sweden, until he was appointed Director and Scientific Member at the Max Planck Institute for Chemical Ecology in Jena, Germany in 2006.
Hansson's research focuses on neuroethological aspects of insect-insect and insect-plant interactions.
[4][5] He also compares these systems to other land-living arthropods, as the giant robber crab on Christmas Island.
Webpage of the Department of Evolutionary Neuroethology at the Max Planck Institute for Chemical Ecology