to the Schutzpolizei (which was taken over by the Gestapo) in Linz, where he was posted to the Jewish Bureau (). Stangl joined the SS in May 1938. He ultimately reached the rank of SS-Hauptsturmführer (Captain). T-4 Euthanasia program, 1940 – March 1943 After the onset of World War II, in early 1940, Stangl was instructed to report for work at the Public Service Foundation for Institutional Care (Gemeinnützige Stiftung für Anstaltspflege), a front organization of the T-4 Euthanasia Program. Stangl purposely solicited for a job in the newly created T-4 program in order to escape difficulties with his boss in the Linz Gestapo. He travelled to the RSHA in Berlin, where he was received by Paul Werner, who offered Stangl a job as supervisor in charge of security at a T-4 facility, and in the language commonly used during recruitment, described Action T4 as a "humanitarian" effort that was "essential, legal, and secret". Next Stangl met with Viktor Brack, who offered him a choice of work between Hartheim and Sonnenstein Euthanasia Centres; Stangl picked Hartheim, which was near Linz. Through a direct order from Reichsführer-SS Heinrich Himmler issued in November 1940, Stangl became the deputy office manager (Police Superintendent) of the T-4 Euthanasia Program at Hartheim Euthanasia Centre, and in late summer 1941 at Bernburg Euthanasia Centre, where people with mental and physical disabilities, as well as political prisoners, were sent to be killed. At Hartheim, Stangl served under Christian Wirth as an assistant supervisor in charge of security. When Wirth was succeeded by Franz Reichleitner, Stangl stayed on as Reichleitner's deputy. During his brief posting to Bernburg Euthanasia Centre Stangl reorganized the office at that T-4 facility. In March 1942, Stangl was given a choice to either return to the Linz Gestapo or be transferred to Lublin for work in Operation Reinhard. Stangl accepted the posting to Lublin in the General Government, where he would manage Operation Reinhard under Odilo Globočnik. Extermination camps Sobibor, April – August 1942 Stangl was appointed by Reichsführer-SS Heinrich Himmler to be the first commandant of Sobibor extermination camp. Stangl was Sobibor's commandant from 28 April until the end of August 1942, at the rank of SS-Obersturmführer. He claimed that Odilo Globočnik initially suggested that Sobibor was merely a supply camp for the army and that the true nature of the camp became known to him only when he himself discovered a gas