army officer Knight Lieutenant General
The mountain of Ole Hansenkammen at Spitsbergen, Svalbard, is named after Hansen.
He was Commanding General of the Norwegian Army from 1903 to 1910, with the rank of Lieutenant General. He was decorated Knight in 1896, Commander in 1904, and with the Grand Cross of the Order of Saint Olav in 1910. He received the Grand Cross of the Danish Order of the Dannebrog, and the Royal Victorian Order.