Bull attended Hale School and the University of Western Australia, graduating with a double degree in law and arts.
[1] Bull was a keyboardist for the band Eskimo Joe in 2004 and 2005, and was a member of The Sleepy Jackson and End of Fashion.
He said he was interested in local politics because he wanted better road safety, accountability, trees and nature playgrounds.
[5][6] Bull is a member of the Labor Party's Left faction and is aligned with the United Workers Union.
[11][12] Following the October 2021 local government election, Bull was unexpectedly defeated as mayor by Labor Right member Filomena Piffaretti, who received the support of independent and Liberal-aligned councillors.