Oliveri is also a solo artist and frequent contributor to his friends' albums and tours, including Winnebago Deal, Masters of Reality, Turbonegro, Moistboyz, Svetlanas and Big Scenic Nowhere among many others.

He is currently the frontman of his project, Mondo Generator, a punk and metal hybrid that he formed in 1997,[11] and the co-founder of the stoner rock power trio, Stöner.

[3] He began his career in 1987 as a guitarist, when he formed Katzenjammer with bandmates John Garcia, Josh Homme, Chris Cockrell and Brant Bjork.

Oliveri left the band following completion of Blues for the Red Sun and was replaced by Scott Reeder, who had been approached about joining Kyuss five to six months earlier during a West Coast tour with The Obsessed.

Nick Oliveri (under the moniker "Rex Everything") formed Mondo Generator in 1997 and with friends Josh Homme, Brant Bjork, Rob Oswald, Karl Doyle and others, recorded the debut album, Cocaine Rodeo.

The album wouldn't be released until three years later due to Oliveri and Homme being full-time members of Queens of the Stone Age.

There was little support of the album by the way of live shows, and the band gained cult status among the most devoted Queens of the Stone Age fans.

Oliveri has said to have come to the conclusion himself that during a soundcheck at a show in Spain in 2003, he acted too aggressively to Josh Homme over his relationship with then-girlfriend Brody Dalle after getting too drunk on wine, raising tension between the two.

[16] In a 2005 interview with BBC Radio 1, Homme stated that he had approached Oliveri about the abuse rumors and told him, "If I ever find out that this is true, I can’t know you, man."

He also revealed an incident that occurred in the UK involving Oliveri and vocalist Mark Lanegan where the former "almost didn't make it out of the country.

"[17] Since his firing from Queens of the Stone Age, Oliveri has recorded an acoustic LP entitled Demolition Day that was eventually released as a second disc in the limited edition of the Mondo Generator album, Dead Planet: SonicSlowMotionTrails.

"[18] There was speculation that he would return in Queens of the Stone Age during their summer tour due to Josh Homme's dedication of "New Fang" to Nick for "new beginnings".

"[19] In late November 2012, Oliveri contributed vocals on the track "If I Had a Tail" for his former band Queens of the Stone Age on their album …Like Clockwork.

Oliveri then joined Queens of the Stone Age on stage for the first time in over a decade to sing "You Think I Ain't Worth a Dollar, But I Feel Like a Millionaire".

[26] Due to Oliveri's ongoing legal problems resulting from a July 2011 incident, he was unable to leave the US and Scott Reeder filled in for him on several international dates.

[27] However, in March 2012, it was revealed that Josh Homme, after persuading bassist Scott Reeder to support him, had filed a federal lawsuit against John Garcia and Brant Bjork alleging "trademark infringement and consumer fraud" over the use of the Kyuss name despite the fact Brant Bjork had originally created the name.

In early 2008, Oliveri joined a West Coast offshoot of Moistboyz dubbed Dickie Moist OTC, on bass.

On August 7, 2008, Oliveri appeared on stage with Turbonegro at Øyafestivalen in Oslo to sing "Back to Dungaree High" and "Nervous Breakdown", the former being a song that Queens of the Stone Age had previously covered on the Turbonegro tribute album Alpha Motherfuckers and the latter a Black Flag cover.

In July 2013, while on tour in Alaska, Oliveri met members of Men With Guns, Lowell George Granath and Cody Kniceley, resulting in the formation of a band called The Situationalists and the recording of two demo tracks.

In late November 2013, Oliveri announced that he would be touring with, and playing bass for Moistboyz, the punk/rock project of Dean Ween, which featured then Mondo Generator drummer Hoss Wright, Guy Heller, and Stephen Haas.

Their album, Naked Horse Rider, featured Oliveri and was recorded at Josh Homme's Pink Duck Studios in California.

[46] In 2019, Oliveri joined Desert Rock veterans Bob Balch (Fu Manchu) and Gary Arce (Yawning Man, Ten East) in the band Big Scenic Nowhere for the group's debut EP, Dying on the Mountain.

[49][50] Gunash supported Nick Oliveri on his European "Death Acoustic Tour" and Mondo Generator on some dates in Italy and France.

On July 10, 1999, Oliveri and Josh Homme were involved in an altercation with British rock band Terrorvision while Queens of the Stone Age were on tour in London.

Oliveri's record in the case will be expunged as long as he completes court-ordered community service, anger management, and remains out of trouble for six years.