Yeo, born and raised in Invercargill, began publishing cartoons while still at high school. In 1991, he began a four year collaboration with Angus Low on a weekly cartoon serial Phatman, which was published in The Southland Times. He subsequently worked full-time at the Times, mainly in advertising and marketing before becoming the Editorial Artist in 2010. Yeo joined Fairfax Editorial Services in 2011 supplying illustrations, cartoons and caricatures to the entire Fairfax NZ stable of newspapers and magazines. Also in 2011, he created A Splotch of Ink, a weekly pantomime cartoon which appeared every Saturday in The Southland Times and ran for four years. In 2013 he was appointed political cartoonist for the Sunday News. In 2016, he began supplying caricatures to the Dominion Post. He has also produced illustrations for children’s books as well as writing and illustrating his own book The King, the crown and the dragon, which was published in 2006.
Search for Yeo, Shaun in the NZ Cartoon Archive collection on the National Library of New Zealand website.