Ole Jørgen was the first employee in NORSUS, from its first days as Ostfold Research (started 1988). He has been institute leader for Preventive environmental protection (1988-93), leader of the LCA team (1993-1995), managing director (1995-97), senior researcher and research leader, before again being managing director from 2005 to 2009. Now he is senior researcher and leader of the NorEnviro.

From 1997-2004 Ole Jørgen was professor II in Industrial Ecology and Environmentally friendly design at NTNU. He was a member of the committee for Strategic Research on Sustainable Energy and Environment at the Danish Innovation Fund from 2009-2014.

Ole Jørgen has been a part-time professor of Renewable Energy at the Department for Natural Management at NMBU from 2010. From 2015, this has been partly funded by a 5-year pro-gramme for competence building in the waste sector (ReDu).