Kongshaug is the son of Peer Albert Kongshaug, who represented Norway in sailing and placed eighth at the 1988 Flying Dutchman World Championship in
Medemblik, Netherlands. At the
2020 World Junior Speed Skating Championships in February 2020, Kongshaug won the gold medal in the 1000m event. He took part in the
2021 European Speed Skating Championships in
Heerenveen, where he finished in sixth place in the 500m and also finished in 10th and 19th place in the 1000m and 5000m events, respectively. At the
World Single Distances Speed Skating Championships in
2021, he finished 14th in the 1000m, 18th in the 5000m, and was not selected for the team pursuit. At the
2022 European Speed Skating Championships, Kongshaug finished 7th place in the 1500m and 17th place in the mass-start. Having qualified for the
2022 Winter Olympics, which took place in February 2022, in the 1500m event, he finished 1.18 s behind the Dutch champion
Kjeld Nuis, competing in the tenth race against the silver medalist
Thomas Krol. With Kongshaug's teammates
Hallgeir Engebråten and
Sverre Lunde Pedersen, the Norwegian relay obtained the best qualifying time and then won in the semi-final against the Dutch and then against the Russians in the final, the latter having nevertheless established a new Olympic record in their duel against the Americans. ==Personal records==