Preben A. Onarheim New COO Head Energy is happy to announce that with immediate effect, Preben A. Onarheim has entered the position as COO. Onarheim has been part of the Head Energy Group since 2012. Preben A. Onarheim has previously held the position as Contract Manager/HSEQ Manager, and will still be responsible for both areas. 2017-04-07T15:15:07+02:00March 23rd, 2017|