sentences:  His academic career started at the calculation centre at the University of Trondheim 1972-74, at Fishery Science Research Institute 1974-1986 and at MARINTEK from 1986-1990.From 1990-1996 he was employed at the European Space Agency space station program at the European Space Technical Centre in the Netherlands.In 1984 he became Professor II and in 1998 Professor in marine projecting.