Björn, twin brother of Bengt Zikarsky, was a German swimmer who represented West Germany at the 1988 Seoul Olympics and re-unified Germany eight years later at Atlanta. He was a member of the 4x100 freestyle and the 4x100 medley relay squads on both occasions. In 1988 the freestyle relay team finished sixth and the medley relay team, fourth. At Atlanta, Zikarsky won the bronze medal with the freestyle relay squad, and also finished fourth in the medley relay.
At European Championships, Zikarsky won one gold (1989), one silver (1995), and three bronze medals (1993 and 1995), mostly as a relay swimmer. He later emigrated to Queensland, Australia, to settle with his wife Kylie who was a swimmer and surf life-saver. Zikarsky became CEO of a company dealing with interior designs.