Staffelkapitän is a position (not a rank) in flying units (Staffel) of the German Luftwaffe

Luftwaffe

Luftwaffe is a generic German term for an air force. It is also the official name for two of the four historic German air forces, the Wehrmacht air arm founded in 1935 and disbanded in 1946; and the current Bundeswehr air arm founded in 1956....

 that is the equivalent of RAF

Royal Air Force

The Royal Air Force is the aerial warfare service branch of the British Armed Forces. Formed on 1 April 1918, it is the oldest independent air force in the world...

/USAF Squadron Commander. Usually today a Staffelkapitän is of Oberstleutnant

Oberstleutnant

Oberstleutnant is a German Army and Air Force rank equal to Lieutenant Colonel, above Major, and below Oberst.There are two paygrade associated to the rank of Oberstleutnant...

 or Major

Major (Germany)

Major is a rank of the German military which dates back to the Middle Ages.It equates to Major in the British and US Armies, and is rated OF-3 in NATO.During World War II, the SS equivalent was Sturmbannführer....

 rank.

In the Luftwaffe of the Wehrmacht

Wehrmacht

The Wehrmacht – from , to defend and , the might/power) were the unified armed forces of Nazi Germany from 1935 to 1945. It consisted of the Heer , the Kriegsmarine and the Luftwaffe .-Origin and use of the term:...

 the Staffelkapitän usually held the rank of a Oberleutnant

Oberleutnant

Oberleutnant is a junior officer rank in the militaries of Germany, Switzerland and Austria. In the German Army, it dates from the early 19th century. Translated as "Senior Lieutenant", the rank is typically bestowed upon commissioned officers after five to six years of active duty...

or Hauptmann

Hauptmann

Hauptmann is a German word usually translated as captain when it is used as an officer's rank in the German, Austrian and Swiss armies. While "haupt" in contemporary German means "main", it also has the dated meaning of "head", i.e...

. 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

Non-commissioned officer

A non-commissioned officer , called a sub-officer in some countries, is a military officer who has not been given a commission...

was tasked with this role, he was also referred to as a Staffelführer.