"What’s in It for Employees? Uncovering the Moderating Role of Task Characteristics on the Use-Performance Relationship in Enterprise Social Software Use", invited speaker at the Information Systems Research Seminar, University of Cologne, October 21, 2014.
"Knowledge Management and Enterprise 2.0", invited member of the panel discussion at the KnowledgeCamp 2012, Karlsruhe University of Applied Sciences, October 12, 2012.
"Hand in Hand: Aligning Knowledge Management Strategy with Business Strategy", presentation at the 31st Annual International Conference of the Strategic Management Society, Loews Miami Beach Hotel, Miami, Florida, USA, November 07/08, 2011.
"Improving the Success of Employee Portals: Empirical Results and Design Implications", invited speaker at the Information Systems Doctorate Seminar, University of Mannheim, October 19, 2011.
"Knowledge Management Benchmarking for Improving the Performance of Consulting Processes: Experiences and Insights from the Professional Services Firms Industry", invited speaker at the 'WM-Stammtisch Frankfurt', September 15, 2011.
"Social Media and Mobile Collaboration", invited speaker at the 'Vodafone Global Enterprise – VGE University', Vodafone Düsseldorf, November 09, 2010.
"The Assistant Professorship at a Private University", invited speaker at the 'IS Postdoc and Junior Faculty Workshop 2010', Karlsruhe, November 06, 2010.
"Measuring KM Value in Professional Services Firms", invited speaker at the symposium 'Determining the Value of Knowledge Based Initiatives', 43rd Annual Hawaii International Conference on System Sciences, The Grand Hyatt Kauai Resort & Spa, Koloa, Kauai, Hawaii, USA, January 08, 2010.
"Corporate Adoption of Web 2.0: Challenges, Success, and Impact", presentation at the Pre-ICIS SIM Academic Workshop 'Enterprise and Industry Applications of Web 2.0', J.W. Marriott Desert Ridge Resort, Phoenix, Arizona, USA, December 15, 2009.
"Knowledge Management Benchmarking for Performance Improvements of Consulting Processes: Experiences and Insights from Professional Services Firms", invited speaker at the ProWis Connect meeting, Marburg, May 28, 2009.
"Improved Compliance through ILM", invited speaker at the 'Forum Information Systems', University of Applied Sciences, Darmstadt, Germany, February 5, 2009.
"Knowledge Management and the DNUG: Presentation of a Working Committee! Results and further Development", presentation at the 'IBM Lotus Technical Forum 2006 (24th DNUG Conference)', Stadthalle Karlsruhe, Karlsruhe, Germany, May 16, 2006.
"Integrated Knowledge Management – Connecting effectively Strategy, Processes, and Systems", presentation at the 'DWT-Workshop Leadership Competency 'Implementing Knowledge Management at the German Federal Armed Forces'', Air Force Barracks Cologne Wahn, Cologne, Germany, April 5, 2006.
"Semantic Knowledge Retrieval in Collaborative Office Environments", main presentation at the Knowledge Management Get-Together OWL, Gildenhaus, Bielefeld, Germany, March 01, 2005.
"Lighting the Lamps of Knowledge: GCC K-Pool and Topic Maps on the Way around the World – Practical Experiences for Universities and Industry", presentation at the German Notes User Special Event 'Collaborative Solutions for Universities', Paderborn, Germany, April 23, 2004.
(with E. Pulst)
"Market Overview of Knowledge Management Tools", presentation at the meeting of the Working Committee for Knowledge Management of the German Notes User Group (DNUG), InterCity Hotel Frankfurt, Frankfurt, Germany, December 9, 2002.
"Knowledge Management with Topic Maps in Collaborative Environments", invited speaker at the 2nd DS&OR alumni meeting 'Symposium Knowledge Management', Business Computing 4, University of Paderborn, Paderborn, Germany, July 06, 2002.
"Using Topic Maps for Identification, Representation, and Navigation of distributed Knowledge Structures in a Process-oriented Groupware Environment", presentation at the meeting of the Working Committee for Knowledge Management of the German Notes User Group (DNUG), Maritim Hotel Bonn, Bonn, Germany, June 17, 2002.
"Groupware and Knowledge Management", chair of a professional workshop at the meeting of regional managers 'Marketing between Theory and Practice e. V.' (MTP e. V.), University of Hamburg, Hamburg, Germany, November 10, 2001.
(with C. Huth)
"The GCC-KM-PROCESS Architecture – Using Building Blocks of innovative Interfaces for Knowledge Management", presentation at the '15th Conference of the German Notes User Group (15th DNUG Conference)', Hannover Congress Center, Hannover, Germany, November 9, 2001.
"K-Discovery: Identification of Distributed Knowledge Structures in a Process-oriented Groupware Environment", invited speaker at the exhibition 'Infobase 2001 – International Exhibition for Information and Communication: Lotus Notes Solution Center', Fair/Exhibition Frankfurt, Frankfurt/Main, Germany, May 8, 2001.
* "Successfully Designing Intranets", ManagementCircle, Invited Speaker/Instructor, 2010
* "Semantic Web and Knowledge Technologies", Computer Graphics Center (ZGDV), Invited Speaker, 2005
* "XML Topic Maps", Computer Graphics Center (ZGDV), Invited Speaker, 2003
* "XML and Information Systems", Computer Graphics Center (ZGDV), Invited Speaker, 2002
* "Enhanced Applications with Lotus Notes", ManagementCircle, Invited Speaker/Instructor, 2002
* "Communication and Knowledge Transfer with Lotus Notes", ManagementCircle, Invited Speaker/Instructor, 2001