one day, then in Grini concentration camp from August 1942 to July 1943, then in Natzweiler-Struthof, Neckarelz and Vaihingen an der Enz concentration camps. Post war After the war, Halvorsen continued working for the NFF, with the title of Secretary General, until his death in 1955. He was a board member of Norsk Tipping from 1946. He was decorated Knight of the Swedish Order of Vasa. He died in Narvik in 1955. References External links 1898 births 1955 deaths Norwegian footballers Norway international footballers Norwegian football managers Norwegian expatriate football managers Olympic footballers of Norway Footballers at the 1920 Summer Olympics Sarpsborg FK players Hamburger SV players 1938 FIFA World Cup managers Norwegian expatriate footballers Expatriate footballers in Germany Norwegian expatriate sportspeople in Germany Grini concentration camp survivors Natzweiler-Struthof concentration camp survivors Vaihingen an der Enz concentration camp survivors Hamburger SV managers Norway national football team managers Knights of the Order of Vasa Association football midfielders People from Sarpsborg Sportspeople from Viken (county)