[citation needed] From 1996 to 1998, Campbell had a leading role in the New Zealand drama series, City Life playing the Prime Minister's rebellious son, Aaron Kellett.

Campbell also appeared in New Zealand dramas, Jackson's Wharf and The Legend of William Tell, before travelling to New York where he studied at The Cay Michael Patten Acting Studio.

The radio show was a labor of love, sponsored by "The Salvation Army", it incorporated cognitive behavioral therapy, philosophy, humor, music and live studio interviews, and was designed to teach people, specifically Sydney's Inner City street kids, how to turn negatives into positives.

[2] Campbell then joined soap opera, Home and Away as Michael Patton, before guest starring in the Australian TV drama, Sea Patrol playing troubled mercenary, Garth Davidson.

In 2011 Campbell appeared in the feature film, Burning Man, before starring as Sydney's infamous 1920s gangster, Jim Devine in Australia's highest rating television drama series, Underbelly: Razor for the Nine Network.

In 2015 Campbell starred as author and widowed father, Alex Gibbs in the feature film, Without a Body which co-stars Kevin Sorbo, Michael Welch, Rena Owen and Isabella Kai Rice.

Campbell also starred alongside Lee Byung-hun and Gong Hyo-jin in the dramatic South Korean feature film A Single Rider which was released by Warner Bros in 2017.