2016-2017 European chair in the ACL International Sponsorship Committee
2016 Publicity chair of ECAI 2016
2015 – Board member of Radboud Women in Computer Science(RWoCS)
2014 Co-organizer of BNAIC 2014
2013 Co-organizer of the symposium “E-Health voor mensen met communicatieve beperkingen: wetenschap en praktijk”
2013 Co-organizer of the BENELEARN 2013 workshop
2012 Local organization chair for IIiX 2012
2010 Co-organizer of the DIR 2010 workshop
2008 Editor of the CLIN 2007 proceedings
2007 Co-organizer of the CLIN 2007 conference
2005 – 2008 Member of the organizing committee of the Language and Speech Colloquium
Reviewing for books and journals
Since 2016 Reviewer for ACM Transactions on the Web
Since 2015 Reviewer for International Journal of Machine Learning and Cybernetics (JMLC)
Since 2015 Reviewer for Journal of Information Science
Since 2014 Reviewer for Information Processing and Management
Since 2014 Reviewer for International Journal of Information Technology and Decision Making
Since 2014 Reviewer for International Journal of Human-Computer Studies
Since 2014 Reviewer for the Journal of Natural Language Engineering
Since 2013 Reviewer for Data and Knowledge Engineering
Since 2013 Reviewer for Information Retrieval
Since 2013 Reviewer for Neurocomputing
Since 2012 Reviewer for Journal of Computer Science and Technology
Since 2012 Reviewer for Transactions on Knowledge and Data Engineering
Since 2011 Reviewer for Transactions on Information Systems
Since 2011 Reviewer for the International Journal on Artificial Intelligence Tools
Since 2010 Reviewer for Information Extraction from the Internet (iConcept)
Since 2010 Reviewer for Current Challenges in Patent Information Retrieval (Springer)
Since 2010 Reviewer for The Computer Journal
Since 2009 Reviewer for JASIST
Reviewing for conferences and workshops
2016-2017 Reviewer for ACM SIGIR
2011-2016 Reviewer for CIKM
2016-2017 Reviewer for ACM CHIIR
2011-2017 Reviewer for ECIR
2012, 2014 Reviewer for IIiX
2010-2014 Reviewer for LREC
2011-2016 Reviewer for DIR
2014-2016 Reviewer for iSWAG
2016 Reviewer for the DiscoNLP
2016 Reviewer for Hypertext 2016
2015 Reviewer for RANLP 2015
2014 Reviewer for LaTeCH 2014
2012 Reviewer for Coling 2012
2011 Reviewer for IRFC-2012
2012 Reviewer for EACL 2012
2011 Reviewer for IRFC-2011
2009 Reviewer for the NAACL 2009 Student Research Workshop
2008 Reviewer for the ACL 2008 Student Research Workshop
Other professional activities
Since 2013 Editor of DIXIT, periodical of the Dutch Organization for Language and Speech Technology
2010 Member of the review committee for the STIL scriptieprijs
2008 – 2011 Member of the PR committee and webmaster for Taalwetenschap