2006-  Professor in Knowledge Organization, The Royal School of Library and Information Science (RSLIS) in Denmark.

2001 - 2006: Research professor in Knowledge Organization, The Royal School of Library and Information Science (RSLIS) in Denmark.

2000 - 2001: Professor in Knowledge Organization at the University College in Borås, Sweden.

1994 - 1997: External lecturer in the history and philosophy of psychology at the University of Copenhagen (Open University). (Additional job).

1990 - 2001: Head of Department of "Science and Humanities Information Studies" at RSLIS.

1983 - 1986: External lecturer at the University of Copenhagen, Institute of Applied and Mathematical Linguistics. (Additional job).

1984: Degree in library science from RSLIS: Research librarians and documentalists.

1978 - 1990: Research Librarian at the Royal National Library in Copenhagen. Coordinator of the computer based reference services.

1974: MA in psychology, the University of Copenhagen.

1972 - 1975: Documentalist in the NORDDOK-17 project. Training in documentation in Stockholm.

1973 - 1978: Lecturer in the Department of Reference and Documentation at the RSLIS. Participated in the introduction of information science.