Himmler appointed a former junior naval officer, Reinhard Heydrich, to organise the small agency.[6] The office was renamed Sicherheitsdienst (SD) in the summer of 1932.[7] The SD became more powerful after the Nazi Party took control of Germany in 1933 and the SS started infiltrating all leading positions of the security apparatus of the Reich. Even before Hitler became Chancellor in January 1933, the SD was a veritable "watchdog" over the SS and over members of the Nazi Party and played a critical role in consolidating political-police powers into the hands of Himmler and Heydrich.[8]