Sigurd Andersson’s first accomplishments as a cross-country skier came in 1946, when he won silver in the district junior championships and won his club championship. In 1950 Andersson was second in the district championships, won bronze at the Swedish Championships in the 15 km and was selected to the Swedish national team. In 1951 he won the 18 km race and was second in the relay in Garmich-Partenkirchen. At the 1952 Olympics, Andersson’s only start was in the relay, where he skied the second leg, earning a bronze medal. Later that year he won his only Swedish title, again in the relay. In 1955 Andersson won all the cross-country events, including the relay, at his district championships. Andersson was lumberjack by profession.
Sweden