Wackerman has also performed, either as a member or a session or touring member, with Blink-182, Bad4Good, Infectious Grooves, Glenn Tipton, Mass Mental, Suicidal Tendencies, The Vandals, Avril Lavigne, Korn, Kidneys (in which he sang and played guitar, releasing two albums), Fear and the Nervous System, Tenacious D, Farmikos, Tom Delonge, and Big Talk.

He appeared on five albums with them (The Process of Belief, The Empire Strikes First, New Maps of Hell, The Dissent of Man and True North) as well as their 2013 EP Christmas Songs.

[4] At the time of his departure, Wackerman was Bad Religion's all-time longest standing drummer, surpassing Bobby Schayer, who was in the band for ten years.

[citation needed] In 2006, for The Pick of Destiny tour, Wackerman was selected to feature as the drummer for Tenacious D due to his previous work on the Vandals' Look What I Almost Stepped In... album, which both Jack Black and Kyle Gass cameo on.

His first full-length album with the band was their October 2016 release The Stage, which showcased his progressive metal style of drumming, often using fast double kicks and blast beats.

Wackerman is also the drummer for the Innocent,[6] a thrash metal band featuring bassist Ryan Sinn (formerly of Angels & Airwaves and the Distillers), vocalist Brandan Schieppati (Bleeding Through), and guitarist Dave Nassie (No Use for a Name).

In March 2008, Wackerman joined Korn guitarist James "Munky" Shaffer's newest solo project, experimental industrial rock band Fear and the Nervous System,[7] alongside vocalist Steve Krolikowski (Repeater), Billy Gould (Faith No More), Leopold Ross (Error), and Zac Baird (Korn, Billy Goat).

Brooks was hired to record drums on Blink-182 member Tom DeLonge's debut solo album To the Stars... Demos, Odds and Ends.