Prof. Dr. Stefan Dietze is Professor of Data & Knowledge Engineering at Heinrich Heine University Düsseldorf and Scientific Director of the department Knowledge Technologies for the Social Sciences at GESIS (Leibniz Institute for the Social Sciences) in Cologne.

His research is concerned with mining and interpretation of large amounts of heterogeneous data, in particular from the Web, using methods at the intersection of natural language processing, machine learning, and information retrieval. Being head of the Knowledge Technologies for the Social Sciences department at GESIS, a particular focus is on the use of (social) web data for interdisciplinary research questions in the social sciences. At DIID, he is interested in the investigation of online discourse using NLP-based methods, e.g., for the recognition and classification of statements or sources or the understanding of information diffusion in social networks.