Björn began directing while working as a creative at TBWA Paris. With several collaborators, Björn formed the collective The Vikings in 2007. Their work includes “Wind,” which won a Cannes Gold Lion and an honorable mention at Sundance. Since 2008, Björn has been the collectives’ sole director. His spot for Assassin’s Creed III “Rise,” for Sid Lee, garnered over 35 million impressions in one week.