• Bob Marlette
• Producer, Engineer

• Vinnie Paul
• Producer, Mixing, Engineer

• Danny Saber
• Harmonica, Producer

• Randy Staub
• Engineer, Mixing

• Steve Thompson
• Mixing

• Paul Trust
• Producer, Mixing

• John X. Volaitis
• Engineer, Mixing

• Rick Wake
• Executive in Charge of Music

• Andy Wallace
• Producer, Mixing

• Dave Wyndorf
• Producer

• Mike Landolt
• Engineer

• Twiggy Ramirez
• Bass, Guitar (Rhythm)

• D. Sardy
• Producer, Mixing

• Ulrich Wild
• Producer, Mixing, Engineer

• Godhead
• Performer

• Diamond Darrell
• Producer, Mixing

• Greg Gordon
• Engineer

• Powerman 5000
• Performer

• (hed) p.e.
• Performer

• John Ewing, Jr.
• Engineer

• Saliva
• Performer

• Sterling Winfield
• Producer, Engineer

• Denise Luiso
• Soundtrack Producer

• Cut Chemist
• Engineer

• System of a Down
• Performer

• Josh Abraham
• Producer, Mixing

• Ed Gerrard
• Soundtrack Producer

• Static-X
• Performer

• Endo
• Performer

• Disturbed
• Performer

• Taproot
• Performer

• Andy Gould
• Soundtrack Producer

• Flybanger
• Performer

• Linkin Park
• Performer

• Juan Carcia
• Mixing Engineer

• Wayne Static
• Producer, Engineer

• Randy Spendlove
• Soundtrack Producer

• Half Cocked
• Performer

• Tom Baker
• Digital Editing, Mastering

• Matt Hyde
• Producer, Engineer, Mixing

• Monster Magnet
• Performer

• Marilyn Manson
• Performer

• Tom Araya
• Performer

• Don Gilmore
• Producer

• John Goodmanson
• Mixing

• Pantera
• Performer