Born in Canberra,[1] Campbell completed a Bachelor of Arts degree from the Australian National University in 1993.
[2] He subsequently began working casually as a freelance artist for The Canberra Times.
[2][3] In addition to this employment with The Canberra Times, Campbell continued to work as a freelance illustrator.
[2] As of 2024, Campbell has won the Walkley Award for his editorial cartoons on two occasions: in 2013 for "Glimmer of Hope" about Julia Gillard's Prime Ministership, and in 2019 for "Silver Fern" about the Christchurch mosque shootings.
[4] As of 2024, he has won seven Stanley Awards as voted by his peers in the Australian Cartoonists' Association.