Master of Science, University Luleå, 1979. Doctor of Philosophy in Engineering, University Luleå, 1995.
Heating engineer, consultant, Riksbyggen, Luleå, 1980-1982; head process and research, Swedish Energy Sys., Luleå, 1982-1987; research engineer, U. Luleå, 1989-1991; assistant master energy engineering, U. Luleå, 1991-1996; assistant professor, U. Luleå, since 1996.
Participant 2d International Conference on Multiphase Flow, Kyoto, Japan, 1995. Sergeant artillery Swedish Army, 1973-1974.
Married Eva Helena Rensfeldt, July 23, 1977. Children: Jessica, Fredrik.