Viktor Hermann Brack (9 November 1904 - 2 June 1948) was a Nazi war criminal, the organiser of the Euthanasia Programme, Action T4, where the Nazi state systematically murdered disabled German and Austrian people. Following this, Brack was one of the men responsible for the gassing of Jews in the extermination camps, and he conferred with Odilo Globocnik about the practical implementation of the Final Solution. Brack was sentenced to death in 1947 and executed in 1948.
Hermann Erich Bauer (March 26, 1900 — February 4, 1980), sometimes referred to as "Gasmeister", was a SS-Oberscharführer (Staff Sergeant). He participated in Nazi Germany's Action T4 program and later in Operation Reinhard, serving as a gas chamber operator at Sobibor extermination camp. Erich Bauer was one of the persons who directly perpetrated the Holocaust.
Erwin Hermann Lambert was a perpetrator of the Holocaust. In profession, he was a master mason. He supervised construction of the gas chambers for the Action T4 euthanasia program at Hartheim, Sonnenstein, Bernburg and Hadamar, and then at Sobibor and Treblinka extermination camps during Operation Reinhard. He specialized in building larger gas chambers that killed more people than previous efforts in the extermination program.