Main editor for Algebras and Representation Theory
Speaker of the DFG priority program SPP 1388 (till 2015)
Contact person for the German Mathematical Society
I am a co-organizer of the regional seminar Transformation Groups & Mathematical Physics.
I am participating in the Collaborative Research Centres CRC/TRR 191
studies at the universities in Hamburg, Basel and at the , PhD at the , postdoc positions at the and at the , habilitation at the , visiting professorship at the , professorship at the , membre junior of the , professorship at the , visiting professorship at / , since 2005 professor at the .