Professor Reussner is a director at the FZI, where he is also a part of the board of directors as scientific member. At KIT he is head of the IPD and the chair “Software Design and Quality” (SDQ) within the IPD. He is also director of the KSRI (Karlsruhe Service Research Institute), co-editor of the Handbook for Software Architecture and founder of the “Software Architecture”  professional group of the Gesellschaft für Informatik e.V. (GI).

The research at the SDQ deals with component-based architectures, whereby the implications of the architecture for the security of software systems are a key issue.