Holmen-Jensen, who started for Bærum IL, played his first World Cup competition on December 30, 1979 at the start of the 1979/80 Four Hills Tournament in Oberstdorf . However, he remained on the tour without any points and was only able to jump into the points with 14th place in the jumping in Thunder Bay, Canada on January 20, 1980 . When ski flying in March 1980 he reached 9th place in Vikersund .
On March 22, 1981, he won his first and only World Cup in his career by jumping on the large hill in Planica . After he could not repeat this success, but was successful with various top 10 placements, he ended his active jumping career after jumping on March 11, 1983 in his home town in Bærum.