Hagemoen began his international career in junior jumping on March 8, 2009 in Lahti . After there was nothing to see of him internationally for two years, he started in December 2011 in two competitions in Notodden as part of the FIS Cup , in which he achieved 12th and 20th place.
In 2012 Hagemoen won the gold medal in the team at the Norwegian Championships in Voss together with Fredrik Bjerkeengen , Robert Johansson and Kenneth Gangnes . At the ski jumping World Cup in Lillehammer , Norway , he was active as a forerunner and injured himself while jumping. Despite the injury, he started at the Norges Cup in Vikersund two weeks later and jumped to 12th place in both competitions.
With Jenny Synnøve Hagemoen and Bjørn Einar Hagemoen, Leif Marius Hagemoen has two siblings who also ski jumping. On the Smebybakken, a K30 hill in Dokka , he and his sister hold the joint hill record of 31.5 meters, which was set on the same day.
Norway
