Dolmayan first became interested in drums at the age of two.[5] His father was a saxophone player and when his mother would take him to watch his father play, he would mimic his father's drummer.[6] He learned to play the drums by putting on records and practicing for hours a day, and continued said practice for years.[5] Dolmayan describes his musical style as one influenced by whatever he could get his hands on, including the jazz albums belonging to his father and the rock albums he shared with his friends.[5]
Dolmayan wonDRUM! Magazine's 2006 Drummer of the year and was the feature story in their March edition.[9]The band went on hiatus in 2006, but reunited in 2010 to occasionally tour.
After System of a Down went on hiatus in 2006, Dolmayan teamed up withDaron Malakian (System of a Down's guitarist/vocalist) to form a new band called Scars on Broadway, which recorded theireponymous debut album in 2007 and 2008.[10] The album was released in the summer of 2008 and Dolmayan, Malakian, guitaristFranky Perez, bassist Dominic Cifarelli, and keyboardist Danny Shamoun performed concerts and prepared to embark on a tour in support of the album before Malakian suddenly cancelled the tour in October 2008.[11]
In August 2009, Dolmayan, Perez, Shamoun, and Cifarelli as Scars on Broadway traveled to Iraq for a USO tour across the U.S. army bases. Their setlist consisted of covers as well as a few Scars on Broadway songs.[12][13]
Scars on Broadway reunited with Malakian on May 2, 2010,[14] and released a new single later that year.[15] However, the project went dormant and Dolmayan was no longer involved when Malakian reformed the group in 2018.[16]
In June 2009, Dolmayan formed a new rock band called Indicator with three friends fromSouthern California, members of the recently disbandedpunk rock band If All Else Fails: Tom Capossela, Ryan Huber, and Ryan Murphy.[20] The band played their first show at The Bitter End in San Diego on July 22, 2009, with Dolmayan's fellow Scars on Broadway member Franky Perez joining the band for a few songs. Their second and final show took place at a strip club in Las Vegas.[21] The band wrote 10-12 songs from 2009 to 2010; live and acoustic demos exist of them all.[22] The four remain in contact although it is uncertain whether the songs will ever be properly recorded.
Dolmayan performed with System of a Down bandmatesDaron Malakian and bassistShavo Odadjian and Scars on Broadway guitarist Franky Perez for Odadjian's Halloween show.[23] Dolmayan, Malakian, and Odadjian performed together again in November 2009 during a charity show forDeftones bassistChi Cheng.[24]
Dolmayan has devoted much of his life to the comic book retail industry, including launching Torpedo Comics out of Nevada.[25] Torpedo Comics has two brick and mortar stores in addition to a significant online presence.[26]
John Dolmayan is married to Diana Dolmayan (née Madatyan), who is the sister of Tankian's wife Angela, making them brothers-in-law.[31][32]
On his social media accounts, Dolmayan is very politically active like his bandmates; unlike most members of System of a Down, particularly Tankian, Dolmayan supportedDonald Trump's presidency.[33] Tankian has stated that it is "frustrating" to be politically opposite with his bandmate and brother-in-law.[34] In October 2023, Dolmayan claimed he had lost friends as well as "hundreds of thousands of fans" on Instagram due to his controversial opinions about Trump, his beliefs thatBlack Lives Matter "never had legitimacy" and was a "propaganda tool" for theDemocratic Party, and his arguments that theCOVID-19 pandemic "has always been about money".[35]
A long time comic book fan, Dolmayan owns a comic book shop, Torpedo Comics, in Las Vegas.[36]
^Dolmayan, John (April 27, 2022),Instagram live stream on YouTube (published April 28, 2022), retrievedJuly 15, 2022,Q&A: (What's your moon sign?) Hmm, well I'm uh, I'm born July 15th, 1972, so uh I think, I'm a cancer—I don't know what the moon sign is... [Timestamp, 46:51]