He has broadcast on the Austereo, Fairfax and Macquarie radio networks and in 2011 was nominated for best Talkback Presenter in Australia; he has written several books ranging on topics ranging from humour to Australia's population policy; and has written works for theatre including The Last Man Standing, the Melbourne Theatre Company's commemorative Gallipoli production in 2015.

Vizard founded one of Australia's largest independent Production houses, Artist Services, which was subsequently sold to Granada; he has been the president of the National Gallery of Victoria and the chairman of the Victorian Major Events Company, securing events such as the World Cycling Championships and the World Gymnastics Championships; he has appeared on the cover of Time and Rolling Stone; he was an elected representative to the 1998 Constitutional Convention; he was Father of the Year in 2001.

[2][3] His father, Godfrey, had been a patrol officer in Papua New Guinea in the early 1950s and had been involved in exploring and mapping the uncharted Gulf region around Kerema, including making first contact with native Kukukuku.

Between 1976 and 1982, while still studying at Melbourne University, Vizard wrote and performed in over a dozen productions, working at such theatres and cabarets as The Last Laugh and the Flying Trapeze with a variety of local performers including Rod Quantock, Wendy Harmer, Glenn Robbins, Peter Moon and Paul Grabowsky,[10] who would later work with Vizard as the band leader on his Tonight Live show.

From 1979 to 1985, Vizard was the voice-over man for the racing show Punter to Punter, starring Trevor Marmalade, Dr Turf and Con Marasco, on community radio station Triple R.[11] In 1985 Vizard co-wrote and produced a feature film, The Bit Part, starring Nicole Kidman, for which he was nominated for a Writers' Guild award for Best Feature Film Screenplay.

He also performed impersonations, most notably of Derryn Hinch, Richard Carleton, Don Lane, Ian Turpie, George Donikian, Geoffrey Robertson and even Gough Whitlam in one instance.

[14] By 1994, when he retired from on-air roles, Vizard had been nominated for a Gold Logie as Australia's most popular television performer on four occasions, winning in 1991.

[12] At the 2006 Logie Awards, Vizard appeared with long-time collaborator Michael Veitch in a sketch that reprised one of their most famous roles, that of two camp, bitchy airline stewards.

[20][21] He was the one of lead actors in the 2014 award-winning Tropfest film Granny Smith[22] and was a contributor to the ABC broadcast history of Australian comedy, Stop Laughing This Is Serious.

He was the Executive Producer of Big Girl's Blouse starring Jane Turner, Gina Riley, Magda Szubanski and Marg Downey, which created and first showcased the popular comedic characters Kath & Kim.

[6] Together with Knight, Vizard developed and was the executive producer of several feature films, including The Sound of One Hand Clapping (based on the award-winning novel by Richard Flanagan) and Dead Letter Office (starring Miranda and Barry Otto).

[24] In 1995, Vizard sold half of the shares in his company Artist Services to John Fairfax Holdings for a reported sum of A$9 million (1995).

[7] In 2000 Vizard sold his remaining 50% shares in Artist Services to UK based media company Granada for a reputed $25 million.

He was a consultant to Network Tens comedy show, The Wedge,[26][27] casting and working with Rebel Wilson, Jason Gann, Adam Zwar.

In 1996, was appointed a director of the telecommunications company Telstra, a position he held until his decision to retire from 17 September 2000 and not stand for re-election to the board.

Other organisations with which he has acted as a director or a trustee include Film Australia,[6] Australian Children's Television Foundation[6] and the Transport Accident Corporation.

In December 2006, the Supreme Court of Victoria found in favour of Westpac and ordered Hilliard to repay over $2 million in funds misappropriated from the Vizards to the bank, plus interest.

[43] The Australian Securities & Investments Commission (ASIC) followed-up the allegations[44] with an 18-month investigation, including searching Vizard's home and office in December 2003.

On 28 July 2005, the Commonwealth Director of Public Prosecutions formally announced that they had no provable evidence to proceed with any criminal case against Vizard.

[45] The Commonwealth Director of Public Prosecutions Damian Bugg QC along with ASIC Chairman Jeff Lucy vigorously denied assertions by some sections of the media that they had "gone soft" on Vizard.

[45] A Vizard family company lent CTI money to invest and had an agreement to receive back proceeds (less a management fee).

[41] In his judgement handed down on 28 July 2005, Justice Raymond Finkelstein accepted that Vizard had breached Sections 183 and 232 of the Corporations Act 2001 (C'lth) through his activities.

In 2010, the Vizard Foundation sold the work for an Australian record of $5.4 million and committed the proceeds for charitable purposes, including indigenous scholarships.

[52] In 2008, three years after settling the civil legal proceedings with ASIC, Vizard voluntarily handed back his membership of the Order of Australia.

[57] In February 2010, Vizard began a brief stint on Melbourne radio station Triple M, filling in for Eddie McGuire who was in Vancouver covering the Winter Olympics.

Vizard interviewed more than 1000 guests, including Academy Award-winning directors Peter Weir and Tom Hooper, director of The Kings Speech, authors Jeffrey Archer, Booker Prize-winning Tom Kenneally, Jackie Collins, Peter Carey, Tim Flannery, Grammy-nominated musicians Faith Hill, Tim Mcgraw, Josh Groban, Chris Botti, George Benson, President of the World Bank James Wolfensohn, Martin Short, Christopher Hitchens, Weird Al Yankovic, Australian Prime Minister Julia Gillard and Professor Ross Garnaut.

[14] Vizard's radio program was responsible for breaking the Christmas Island asylum seekers boat crash tragedy in December 2010.

The robber, Richard Lovett who had 93 prior convictions, was arrested later that day after becoming involved in a fight in which he stabbed a man in the chest, puncturing his lung, and was subsequently sentenced for the robbery to four years by the County Court of Victoria.

[64] From 1990, Vizard and his family owned and ran the rural Western District station, Roxby Park, which they operated as a superfine wool Merino sheep stud.