He was appointed leader of Trawniki by Globocnik on 27 October 1941 to conduct training of the collaborationist auxiliary police a.k.a.

[2][5][6] The Trawniki men (German: Trawnikimänner) took part in Operation Reinhard, the Nazi extermination of Jews from across occupied Europe.

They conducted executions at extermination camps and in Jewish ghettos including Belzec, Sobibor, Treblinka II, Warsaw (three times, see Stroop Report), Częstochowa, Lublin, Lwów, Radom, Kraków, Białystok (twice), Majdanek as well as at Auschwitz, not to mention Trawniki itself,[7] and the remaining subcamps of KL Lublin/Majdanek including Poniatowa, Budzyn, Kraśnik, Puławy, Lipowa, but also during massacres in Łomazy, Międzyrzec, Łuków, Radzyń, Parczew, Końskowola, Komarówka and all other locations, augmented by the SS and the Reserve Police Battalion 101 from Ordnungspolizei (Orpo).

[8][9] He directed the Maly Trostenets extermination camp in Belarus, created on May 7, 1942, and closed on January 10, 1943, where an estimated 206,000 prisoners were murdered.

[11] German prosecutor Helge Grabitz believed his word, but also granted him partial memory impairment.