Hierl was already a high-ranking member of the NSDAP when the Party took power in January 1933. He remained the head of the labour organization - now called the Nationalsozialistischer Arbeitsdienst, or NSAD. Adolf Hitler named him as State Secretary in the Reich Ministry of Labour under Franz Seldte, with the order to build up a powerful labour service organization.[1] Facing Minister Seldte's resistance, Hierl in 1934 switched to the Reich Ministry of the Interior under Wilhelm Frick in the rank of a Reichskommissar.