Tanja Zimmermann is Director of Empa and Professor of Materials Science at ETH Zurich and EPF Lausanne. She established the research topic of cellulose nanocomposites at Empa as a group leader and later as Head of Department. She has been a member of Empa’s Executive Board since 2017. Topics such as resource efficiency and net-zero targets are important to her. Tanja Zimmermann is a member of various national and international committees and scientific advisory boards.