I am serving as an associate editor for ACM TODS and for the VLDB Journal. I am a member of the Board of Trustees of the VLDB Endowment. I served as a PC area chair for Temporal, Spatial and Multimedia Data for ICDE 2010. I served as a reviewer for TODS, TKDE, TOIS, TOIT, IS, and DKE. I have served on the programme committees of VLDB (2007, 2005, 1999), SIGMOD (2009, 2004), ICDE (2009, 2008, 2005, 1998), EDBT (2009, 2008, 2000, 1998), SIGSPATIAL (2010, 2009), ADBIS (2007), BTW (2007), CIKM (2010, 2005), IDEAS (2004, 2003, 2002, 1999), TIME (2007, 2002, 2001), SSTD (2003), and WISE (2002, 2001). I am a member of ACM and IEEE CS.
I have been a co-organizer of the 8th EDBT Summer School that was held at the Free University in Bolzano in September 2007. I was a co-organizer of a series on international workshops on visual data mining: 1st International Workshop on Visual Data Mining in conjunction with ECML/PKDD 2001, 2nd International Workshop on Visual Data Mining in conjunction with ECML/PKDD 2001, 3rd International Workshop on Visual Data Mining in conjunction with ICDM 2003. I am a co-editor of Visual Data Mining - Theory, Techniques and Tools for Visual Analytics, Springer 2008.
I served on the PhD committees of Carme Martin (Barcelona 2006), Simonas Saltenis (Aalborg 2001), Giedrius Slivinskas (Aalborg 2001), and Torben Bach Pedersen (Aalborg 2000).