My general research area is data management, and much of my research concerns aspects of the management of temporal, spatial, and spatio-temporal data, including data modeling, database design, data models and query languages, efficient query and update processing, indexing, and systems architectures.
I am Obel Professor of Computer Science, a position made possible by a generous grant from the Obel Family Foundation. I direct Center for Data-Intensive Systems with co-director Torben Bach Pedersen. I am Ph.D. study director of the Technical Doctoral School of IT and Design, an independent unit established by the Technical Faculty of IT and Design as of January 1, 2017. The school currently has some 230 Ph.D. students.
During the late 1980s and the 1990s, I was at the computer science departments at University of Arizona (on sabbaticals) and University of Maryland (as a Ph.D. student) for a total of about five years. From September 2008 to August 2009, I was a Visiting Scientist at Google, Mountain View, working in the structured data research group headed by Alon Halevy. From August 2010 to July 2013, I was a Professor in Department of Computer Science at Aarhus University. In August 2013, I returned to Aalborg University, where I had been a faculty member since the early 1990s.
I am an ACM Fellow (for contributions to temporal and spatio-temporal data management) and an IEEE Fellow (for contributions to temporal, spatio-temporal and mobile data management); and I am a member of the Academia Europaea, the Royal Danish Academy of Sciences and Letters, and the Danish Academy of Technical Sciences.