• Since 2004

  Head of the Laboratory for Distributed Information Systems at the HFT Stuttgart.

• Since 2002

  Professor at the HFT University of Applied Sciences Stuttgart at the Faculty of Surveying, Computer Science and Mathematics for the field of computer science. Freelance Management Consultant.

• 2012-2023

  Director of the Information Centre of the HFT Stuttgart.

• 2004-2012

  Scientific Director of the Computer Centre of the HFT Stuttgart.

• 2000-2002

  Managing Director of plenum Systems GmbH, Wiesbaden.

• 1991-2000

  Managing Director of IBL Ingenieurbüro Letters GmbH, Leinfelden-Echterdingen.

• 1985-1991

  Freelance activity: Consulting in the area of object-oriented systems, Trainer for programming languages, realization of client/server systems.

• 2023

  D. Sonnet, G. Wanner, K. Pfeilsticker: Chancen einer nachhaltigen IT - Wege zu einer ressourceneffizienten Softwareentwicklung. Springer Fachmedien Wiesbaden GmbH, 2023, ISBN 978-3-658-40193-1

• 2015

  F. Müller-Hofmann, M. Hiller, G. Wanner: Programmierung von verteilten Systemen und Webanwendungen mit Java EE. Erste Schritte in der Java Enterprise Edition, Springer Vieweg, 2015, ISBN 978-3-658-10511-2

Membership in the German Informatics Society (GI)
Membership in the Association for Computing Machinery (ACM)
Membership in the Java User Group Stuttgart e.V. (JUGS)
Membership in the International Software Architecture Qualification Board e.V. (iSAQB); Deputy Head of the Working Group Audit