Bjørn is a 1981 graduate of the Norwegian Naval Academy. He holds a Bachelor of Science (cand scient) in Oceanography from the University of Bergen. His shore duty assignments include Chief of Staff, Royal Norwegian Navy Fleet; Transformation Manager, Royal Norwegian Navy; Naval Attaché/Assistant Defence Attaché, Norwegian Embassy in Washington DC; Commander, Norwegian Frigate Service; Program Officer, NATO's Centre for Maritime Research and Experimentation; Operations Officer, Naval Headquarters. His operational tours include Commander, HNoMS Bergen; Executive Officer HNoMS Stavanger and warfare officer positions on multiple navy vessels.
Since 2018 he has worked as a consultant and is still president of the Norwegian Navy League (Sjømilitære Samfund).
2018-2022: Consultant, Norway
1977-2018: Norwegian Armed Forces, Norwegian
2007: Main Course (hovedkurset), Norwegian Defence University College (Forsvarets Høgskole)
2002: Staff Course, Norwegian Staff College (Forsvarets Stabsskole)
1993: Bachelor of Science (Cand Scient), Oceanography, University of Bergen
1986: ASW Warfare Course, German Navy
1981: Officer Training, Norwegian Naval Academy