He is a Polish National Coordinator of CLARIN ERIC (www.clarin.eu) and a member of Global WordNet Association Board. He has been an initiator and is the leader of plWordNet project (a large wordnet of Polish) and is the leader of G 4.19. Language Technology and Computational Linguistic Research Group. His research interests cover different areas of natural language processing and engineering, computational lexicography, data extraction and information retrieval.