[6] Knight started a cadetship in 1980 in the Fairfax art department, filling in the black squares in the crossword grids.
In 1999 Knight, alongside Bill Leak and other male political cartoonists, were criticised by the Labor Party's deputy leader, Jenny Macklin, who argued that cartoons such as those by Knight and Leak showing Meg Lees in sexual relations with John Howard were demeaning to women politicians.
[7] Knight created the children's character "Leuk the Duck" (derived from leukemia), a mascot for the Challenge cancer foundation which has subsequently been used in the organisation's educational material.
After cartoonist William Ellis Green ("WEG") died in 2008, Knight took over his role as the Herald Sun's creator of Australian Football League (AFL) premiership posters and, because of this, has made media appearances on AFL shows, including designing alternate posters.
[17] After receiving several complaints, the Australian Press Council ruled in February 2019 that the cartoon did not breach its media standards.