Ill∴ Rumen Naydenov, 33° is the second Sovereign Grand Commander of the Supreme Council, 33° of A.A.S.R. in Bulgaria having been unanimously elected to that position on May 25, 2018.

He previously served as Lieutenant Grand Commander of this Supreme Council since January 2014.  Grand Commander Naydenov also held the office of the Grand Treasurer of the United Grand Lodge of Bulgaria for six years.

On February 8, 2021, Ill∴ Rumen Naydenov, 33° was unanimously re-elected for Sovereign Grand Commander for the period 2021-2025.