Harvey's first career was in advertising. He was a founder of one of New Zealand's larger advertising agencies, MacHarman Ayer (formerly MacHarman Advertising), for whom he worked from 1962 to 1992. During this time he was heavily involved in election campaigns for the
New Zealand Labour Party between 1969 and 1984. He is credited by many for the physical and political transformation of former New Zealand prime ministers
Norman Kirk and
David Lange. He also worked as election strategist to Auckland mayors Sir
Dove-Myer Robinson, Dame
Catherine Tizard, and
Colin Kay. Harvey was also involved in the environmental campaign objecting to the building of a
hydro-electric power station at
Lake Manapouri in 1968 to 1972, the
Save Manapouri Campaign. He also produced
The Adventure World of Sir Edmund Hillary,
Keep on the Sunny Side,
Seasons in Nasby with Warwick Brock and
Start Again with
Roger Donaldson for television. His agency won many international awards for creativity including the first Cannes television award for a New Zealand television commercial (directed by Roger Donaldson). His advertising career spanned some of the most creative years in New Zealand advertising and Harvey attracted and worked with some leading edge talent including
Dick Frizzell,
John Hanlon, Warwick Brock, Grant Marshall, and Rodney Charters (DOP for the TV series 24). Harvey was an inaugural inductee of the New Zealand Advertising Hall of Fame in 2007. Prior to becoming mayor, Harvey served as deputy chairman of the
New Zealand Film Commission from 1986 to 1992. He returned to the Film Commission as a board member from 2001 to 2006. From 1988 to 1990 he was chairman of the
1990 Commonwealth Games Arts Festival. Harvey was chair of the board of directors for Waterfront Auckland, chairman of the Health Sponsorship Council in 1993–94, and was a board member of the
Tourist Hotel Corporation from 1995 to 1998. He was a member of the
Te Papa board from 2006 until 2009. He is a member of the USA Eisenhower Fellowship Nomination Committee and President of the New Zealand Peace Foundation. A life member of the New Zealand Labour Party, Harvey served as president from 1999 to 2000, stepping in after the death of
Michael Hirschfeld. While he was president, Labour apologised to a
West Auckland family after Harvey lowered his shorts and yelled an obscenity during an argument in public with a long-time adversary in 1999. ==Mayor of Waitakere City==