Campbell has also worked with Thin Lizzy, Whitesnake, Sweet Savage, Trinity, Riverdogs and Shadow King.

Campbell began playing guitar at the age of 12 with a Telecaster Thinline and Carlsbro Stingray amp.

Dio returned to the studio to write and record the follow-up to Holy Diver, The Last in Line, which charted at No.

It featured the hits "Rock N Roll Children" and "Hungry For Heaven", the second of which was also included on the soundtrack to the film Vision Quest.

Craig Goldy played on the disc's only studio song "Time to Burn" and over-dubbed the rhythm parts on the live tracks.

For example, in 2003 Campbell said "[Playing in Dio] never mattered to me – and still doesn't… He's an incredible talent, but he's an awful businessman and way more importantly, one of the vilest people in the industry.

Further, in 2012 Campbell reunited with original Dio members bassist Jimmy Bain and drummer Vinnie Appice, along with vocalist Andrew Freeman, to form the band Last in Line, and Campbell subsequently made statements that suggest he had come to view his time in Dio more positively than he previously had indicated.

Along with Campbell, they recruited guitarist Adrian Vandenberg, bassist Rudy Sarzo and drummer Tommy Aldridge.

[11] Campbell has stated, that he doesn't consider Whitesnake an important part of his career: "We were all great individually, but that lineup with those musicians never really gelled.

It was fun at the time, and I was flattered to have been invited to be a part of the band, but it doesn't mean an awful lot to me from a musical point of view.

"[8] After leaving Whitesnake, Campbell would go on to play on Lou Gramm's second solo album, Long Hard Look.

After a single eponymous album, one music video, and one live show, Campbell left the group to join Def Leppard.

In April 1992, Campbell joined the rock band Def Leppard, after the release of their Adrenalize album.

Campbell made his debut with the band by playing a show in a Dublin club to approximately 600 people.

[citation needed] In mid-2010/early 2011, when Def Leppard was on hiatus, Campbell agreed to join Thin Lizzy, long his favorite band.

[16] He had stem-cell therapy in late 2014, and by October 2015 he announced that while the cancer is still there he was doing much better using immunotherapy, undergoing treatment every three weeks with pembrolizumab.