He has also recorded and toured extensively with the bands Halford and Riot and worked with Fates Warning offshoot Arch/Matheos, Iced Earth, Rob Rock,[1] John West,[2] Spastic Ink,[3] and Juggernaut, among others.

[6] Quickly developing into one of the hottest drummers in town, Jarzombek joined local up-and-comers, Juggernaut, with whom he made his official recording debut, aptly titled Baptism Under Fire, in 1986.

Joined by Riot bassist Pete Perez, the duo formed madcap tech/prog metal outfit Spastic Ink whose 'anything goes'-approach owed as much to the spirit of Frank Zappa and cartoon music icon Carl Stalling as it did to the brothers' early prog heroes such as U.K. and Rush.

Bobby became the drummer for Halford and has subsequently been part of every recording – including Resurrection (2000), Live Insurrection (2001), Crucible (2002), and the Fourging the Furnace EP (2003) – and tour, highlighted by an appearance in 2001 at the massive Rock in Rio III festival in Brazil in front of a quarter million fans.

In 2004, Jarzombek was asked by future Howard Stern sidekick Richard Christy to take over his drum duties with Iced Earth who were in the middle of their U.S. tour in support of The Glorious Burden.

The following year, Bobby recorded Touched by the Crimson King with Iced Earth offshoot Demons and Wizards, and was also approached by former Skid Row vocalist Sebastian Bach who was in need of a touring drummer.

In the summer of 2007, he began his affiliation with long running progressive metal outfit Fates Warning when he was asked to fill in for the band's 2007 Italian 'Evolution Fest' appearance.

In May 2008, it was announced that the members of Riot's classic Thundersteel-era line-up - Mark Reale, Tony Moore, Don Van Stavern, and Bobby Jarzombek - would reunite for a new studio album.

[10] Bobby also joined Transatlantic progressive metal group Zierler, featuring members of Beyond Twilight, Scar Symmetry, Firewind, and Circus Maximus, whose debut album, ESC, was released in October 2015.