Унтер-офицер
In the "Luftwaffe" of the Wehrmacht the "Staffelkapitän" usually held the rank of an "Oberleutnant" or "Hauptmann". For the first weeks of his assignment he was known as a Staffelführer (Squadron Leader), until he was confirmed in this position. If a Non-commissioned officer was tasked with this role, he was also referred to as a "Staffelführer".