He was scientific assistant and university lecturer at Department of Limnology, University of Oslo, from 1960 to 1966; research scientist at Freshwater Institute, Winnipeg, Manitoba, Canada from 1966-1977; and professor of systematic zoology in the Museum of Zoology at the University of Bergen from 1977 to his retirement in 2006.He specialized in aquatic Diptera, especially Chironomidae and Chaoboridae.
Grand Ole Opry | Ole Rømer | Ole Bull | Sven-Ole Thorsen | Ole von Beust | Ole Einar Bjørndalen | OLE DB | Ole Christian Kvarme | Ole Miss Rebels | Ole Worm | Ole Thomsen | Ole Søltoft | Ole Kristian Ruud | Ole Klemetsen | Ole-Johan Dahl | Ole Ivar Lovaas | Ole Edvart Rølvaag | Ole Bjur | OLE Automation | Nils Ole Oftebro | Music of the World Cup: Allez! Ola! Ole! | Kjell-Ole Haune | Joseph Ole Lenku | Israel Kamakawiwo'ole | Et ole yksin | Bent Sæther | The Better 'Ole | Ole Wøhlers Olsen | Ole von Uexkuell | Ole Tobias Olsen |
In 1978 he started Sørli DB Records along with the brothers Paul and Helge Karlsen and produced records by Erik Bye, Cornelis Vreeswijk, and the record featuring The Smurfs in Norwegian.