Rob Holliday is a professional musician. He was the live guitarist of industrial metal band Marilyn Manson as well as for Gary Numan, The Prodigy, and Sulpher. He joined in 2007 as Marilyn Manson's live bassist, but switched to guitars in January 2008 due to the return of former bass player Twiggy Ramirez.
Rob Holliday is half of the band Sulpher, having duties as a lyricist, guitarist and lead vocals. They have released two albums titled Spray, with two singles for the tracks "One of Us" and "You Ruined Everything", and No One Will Ever Know released in 2018. Sulpher also includes Monti (Curve, Cocteau Twins, Gang of Four, The Jesus and Mary Chain) as producer, programmer and drummer and Tim Mud as live guitarist. Holliday is currently the live guitarist for Gary Numan and live guitarist and live bassist for The Prodigy, and also played live guitars and bass for Marilyn Manson during the Rape of the World tour. Holliday did not contribute to the writing or recording of the band's album Eat Me, Drink Me, released in 2007.
Although many people believed Rob to be a temporary member, Manson stated on an interview entitled 'Everyone Will Suffer Now' on the Heirophant that this is not the case, and that Holliday will stay as a permanent member of the band. Holliday played live guitars for The Prodigy on their 2008 tour. It is unclear if he has contributed to Manson's 2009 album The High End of Low, as was the case with the band's former guitarists (with the exception of Mark Chaussee).
- Gift (2001)
- Spray (2002)
- No One Will Ever Know (2018)
- Lighting The Candles (Live CD and DVD) (2005)
- Pure (2000)
- Scarred (2003)
- Hybrid (2003)
- Live at Shepherd's Bush Empire (2004)
- Jagged (2006)
- World's On Fire (Live CD and DVD) (2011)
- The Day Is My Enemy (2015)
- Low Art Thrill – guitar (1996–1997)
- Sulpher – writing, guitar, vocals (1999–Present)
- The Mission – live guitar (2001–2004)
- Curve – live guitar (1998)
- Gary Numan – producer, remixer, live guitar, live bass (2000–2006)
- The Prodigy – live guitar, live bass (2005–2017)
- Flint – live bass (2003)
- Marilyn Manson – live bass (2007), live guitar (2008)