Bullock has recorded over 20 albums and written two books, Hands of Grace (1998) and The power of your love... Jesus the unexpected God (2000).

He completed tertiary studies at North Sydney TAFE in 1976 for a Television Operator's Certificate II.

From 1975 to 1984 he worked as a cameraman at ABC Television in Gore Hill, including work on The Marcia Hines Show, Farnham and Byrne (see John Farnham, Debra Byrne), Mastermind, Parkinson, The Norman Gunston Show and Play School as well as news and current affairs programs.

"[4] He was on the team, led by Brian Houston, that pioneered the Hills Christian Life Centre (later part of Hillsong Church) in August 1983.

[4] Aside from Bullock and Houston the initial pastors were Pat Mesiti, Mike Murphy, Donna Quinn and Michael Smith.

[5]: 26  Bullock was appointed the worship pastor for Hillsong Church in Sydney and was the convenor of their annual conferences from 1987 to 1995.

Tanya Levin described him in her book People in Glass Houses: An insider's story of a life in and out of Hillsong (2007) writing that "[he] was our Piano Man.

"[9] Bullock also wrote his first book, Hands of grace: Jesus, God's symphony of hope, printed by Strand Publishing, in 1998.

[10] His album A Symphony of Hope was released on 21 May 1999,[11] which was recorded with the Prague Philharmonic Orchestra and has Paul Terracini as conductor and arranger.

[14] It was followed in early 2001 by another album, Deeper and Deeper, of which Jennifer Brooker of Cross Rhythms said that it had a "broad rich sound, immaculately produced; some numbers are arranged for full symphony orchestra" although she also wrote that "Shame the songs aren't more memorable, anyone looking for another 'Power of Your Love' won't find it.

[2][5]: 40  Janine was choir master on some of Hillsong Music's releases, including Friends in High Places (July 1995).

[3][22] Bullock has described his mental health issues, including "episodes of mania" and "long periods of depression".

[22][23] In September 2010 he told Terry Allen of Christian Faith website of his condition, "[It] has caused all manner of symptoms in my life which has been confronting.