I joined the Department of Computer Science of TU Dortmund as a full professor in 2008. Before that, I was an associate professor at University Klagenfurt, Austria. My main research theme is related to the application of intelligent system technology to practical problems and the development of methods for building knowledge-intensive software applications. Generally, my research interest is broad and I have been working on a number of topics over the years, including recommender systems technology, knowledge-based systems development, constraint-based systems, semantic web applications and web mining, special topics in operations research and applications of AI planning as well as on specific software engineering problems in the area of the development and debugging of declarative programs. Among others, my research has been published in Artificial Intelligence, IEEE TKDE, AI Magazine, J of Web Semantics, J of Human Computer Studies, Knowledge and Information Systems, Automated Software Engineering, IEEE Intelligent Systems, Annals of Operations Research, and in the proceedings of IJCAI, AAAI, ECAI, ICDM or ISWC. Between 2003 and 2008, I was a co-founder, technical director and later managing director of a startup company that created an award-winning software tool for the development of interactive sales applications.