He won several Norwegian championships in diving, and competed at the Olympic games.
[1] At the Norwegian national diving championships he won a total of fifteen gold medals during his career.
His courses soon became popular, and his brother Håkon Melberg eventually joined as instructor.
He wrote the book Jiu-jitsu — Knep og parader til selvforsvar, which was published in 1942.
On 9 December 1943 he was sent to the Sachsenhausen concentration camp, where he was prisoner number 74254 until the end of the war.