The Supreme Moff was a unique position within the Galactic Empire's hierarchy. The Supreme Moff had no control over any specific territory; instead, the Supreme Moff was the head of the Moff's Council and served as the director for all Moffs and Grand Moffs. He reported directly to the Emperor or the Imperial Ruling Council.

The first Supreme Moff was Nelson Pitchkins, a former Grand Admiral and dedicated follower of the Tarkin doctrine.