Hansen holds a degree in business administration from the Norwegian School of Economics and Business Administration. In 1970, he joined the Research Institute for the Pulp & Paper Industry, and held a series of posts in Jiffy from 1973 to 1983. He served as General Manager in Bergen Bank/Den norske Bank from 1985 to 1994. He then served as Managing Director in Orkla Finans. From 2000 he worked for Statoil ASA as CFO and Executive Vice President and in 2003 as acting CEO.
In 2004 Mr. Hansen was appointed CEO of Aker Kvaerner ASA. He was advisor to Aker ASA from 2006 to 2008. He served as advisor to Scatec AS from 2008 to 2012 and as independent advisor from 2012. Hansen has a long history of board memberships, as a member and as chairman. Hansen was awarded "The Chair of the Year" for 2012, both in Norway and in the Nordic region.