He has also played bass in Gang Green and sang in and produced records for his band Avoid One Thing.
He provided background vocals for the Street Dogs' 2005 album Back to the World as well as the more recent Fading American Dream.
Gittleman has also written songs for bands such as MxPx ("Heard That Sound") and has seen Avoid One Thing covered by The Bouncing Souls ("Lean on Sheena").
Since 2005, Gittleman has been a full-time staff producer and A+R for the Los-Angeles-based independent label Side One Dummy Records.
[1] This was documented in the song "The Pirate Ship" on the vinyl release of Question the Answers.