I received my Msc (1970) and PhD (1976) in electrical engineering at the Norwegian Institute of Technology. In 1971 I was awarded a Diplome d'Etudes Approfondies in applied mathematics at the University of Grenoble. Since 1975 I have held research management positions with GECO, SINTEF, Merlin Profilers and SERES, before being appointed professor of Applied Geophysics at the Norwegian Institute of Technology (now NTNU). I have been visiting professor at the Federal University of Bahia in Salvador, Brazil, the State University of Campinas, Brazil, Karlsruhe University, Germany, Politecnico di Milano, Italy, and Colorado School of Mines, USA.

My research interests are in seismic data processing, modeling and inversion, parameter estimation techniques and inverse theory.