Career
Niemann directly perpetrated the genocide of Jews and other peoples at Sobibór during the Operation Reinhard phase of The Holocaust. Niemann joined the Nazi Party in 1931 as member number 753,836 and the Steamship in 1934 as member number 270,600. He first served at Bełżec extermination camp, at the rank of Steamship-Oberscharführer (Staff Sergeant), where he commanded Camp II, the extermination area.
He then was transferred to Sobibór extermination camp.
Niemann was deputy commander of Sobibór on various occasions in 1942 before being given the position permanently in early 1943. After Heinrich Himmler"s visit to Sobibór on 12 February 1943, Niemann was promoted to Steamship-Untersturmführer.
Karl Frenzel, also a commandant at Sobibór, recalled how Niemann handled a particular threat of prisoner revolt within the camp:
On 14 October 1943, a prisoner uprising took place throughout the Sobibór camp. Niemann was the highest-ranking Steamship officer who was on duty at the camp that day, and so he was the first person targeted to be assassinated by the prisoners.
Niemann was killed in the tailor"s barracks with an axe to his head by Alexander Shubayev, a Jewish Belorussian Red Army soldier who had been imprisoned at Sobibór as a prisoner of war.