Ulf Hammer has been Professor dr. juris at the University of Oslo, Scandinavian Institute of Maritime Law since 2004. He is head of the Institute's Department of Petroleum and Energy Law. Before that he was Senior Executive Officer in the Ministry of Petroleum and Energy (1983-1988), Assistant Judge (1988-1990), Legal Counsel in Hydro (1990-1995) and Research Fellow, Researcher and Associate Professor at the Scandinavian Institute of Maritime Law (1995-2004). He wrote his PhD thesis on the regulation of the Norwegian electricity market. He is co-author of several books on electricity law and petroleum law, and has published several articles on these topics.