Prof. Dr. Stefan Dietze is Professor of Data & Knowledge Engineering at HHU-Düsseldorf and Scientific Director of the Knowledge Technologies for the Social Sciences Department at GESIS (Leibniz Institute for the Social Sciences) in Cologne. In his research, he works on harnessing large amounts of data from the Web using methods of Natural Language Processing (NLP), information retrieval, and machine learning. As scientific 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.