He was a minister in the Everingham, Tuxworth, Hatton, Perron, Stone and Burke governments, serving as Minister for Community Development (1983–1984), Minister for Transport and Works and Housing (1984–1986), Attorney-General (1986–1992 and 1993–1994), Minister for Education (1986–1987), Minister for Lands and Housing (1987–1990), Minister for Conservation (1987–1989 and 1992–1993), Minister for Health and Community Services (1990–1992), Minister for Work Health and Territory Insurance (1992–1993), Minister for Transport and Works (1993–1995), Minister for Police, Fire and Emergency Services (1994–1995), Minister for Housing (1995–1996), Minister for Local Government (1995–1996), Minister for Aboriginal Development (1995–1996), Minister for Correctional Services (1995–1996 and 2000–2001), Minister for Mines and Energy (1996–1997), Minister for Power and Water (1996–1997), Minister for Territory Insurance (1996–1997 and 2000–2001), Minister for Arts and Museums (1996–1999), Minister for Asian Relations, Trade and Industry (1997–1998), Minister for Regional Development (1997–1998), Minister for Asian Relations and Trade (1998–2001), Minister for Industries and Small Business (1998), Minister for Corporate and Information Services (1998–1999), Minister for Communications, Science and Advanced Technology (1998–1999), Minister for Resource Development (1999–2001) and Minister for Public Employment and Industrial Relations (1999–2000).[3]
After retiring from politics in 2001, Manzie worked as a volunteer presenter on the morning show of community radio station 104.1 Territory FM.[4] He retired from radio in December 2016, after 15 years on air.[5]
Manzie was appointed in 2017 as Chair to the NT Committee and to the National Board of the Duke of Edinburgh's International Award – Australia.[6]
