Geoffrey William "Geoff" Bullock (born 6 November 1955) is an Australian singer-songwriter and pianist. He became a committed Christian in November 1978 and in 1983 helped pioneer the Hills Christian Life Centre, which later became part of Hillsong Church. He was appointed as the church's worship pastor and was also the convenor of their annual conferences from 1987 to 1995.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).