John Dolmayan is an Armenian-American musician, songwriter and drummer. He is best known as the drummer of System of a Down. Dolmayan is also the drummer for the band Indicator and former drummer for Scars on Broadway. Dolmayan ranked number 33 on Loudwire list of Top 66 Hard Rock + Metal Drummers of All Time.

Description above from the Wikipedia article John Dolmayan, licensed under CC-BY-SA, full list of contributors on Wikipedia.