He was the chief physician of Landspítali’s operating room in Fossvogur from 2002 and the director of the hospital’s surgery department since 2005. Björn was appointed Chief Medical Officer at Landspítali from 2009 to 2013 He had previously served as Chief Medical Officer from 2007. He was the director of Landspítali from 2010 to 2013. He had previously served as director from April to October 2008.
Since 2016, he has worked for the Swedish healthcare group GHP. He was the director of their spinal surgery departments in Stockholm and Gothenburg. From 2017 to 2019 he was Secretary General of therapeutic areas of GHP and in 2019 he was appointed as the director of Karolinska University Hospital