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In 1992 he became Associate Professor and from 2000 until 2001 he was a Professor for Chemical Ecology at Lund University (2000).
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.