Prior to joining The Dillinger Escape Plan, Rymer was the drummer for Long Island-based rock band The Rivalry.

[1] After a trial of auditions, guitarist Ben Weinman invited him to Australia to play Soundwave Music Festival, and in early 2009 it was revealed that Rymer would officially replace Gil Sharone as the new drummer.

"[2] Rymer reunited with The Dillinger Escape Plan in 2023, alongside Weinman, original singer Dimitri Minakakis and bassist Liam Wilson.

[5] Rymer and bandmates Ryan Hunter, Brian Byrne (both ex-Envy On the Coast) and Michael Sadis (of The Rivalry) announced the band North Korea on November 15, 2010.

The band plans to release an EP with only one week to write this material, Rymer stated "I've found we work best under pressure.

[19] In September 2019, Rymer reunited with Dillinger Escape Plan guitarist Ben Weinman while playing a span of shows behind the kit for Suicidal Tendencies as a fill-in for Dave Lombardo.