Walker, who claims to be a recidivist cartoonist and illustrator, has drawn for many publications for many years. Newspapers include The Examiner, the National Business Review, The Independent and the Sunday News and he has also published several cartoon books. Currently he draws for NZ Doctor, Architecture NZ and, several days a week, for the Dominion Post. He is probably the only New Zealand cartoonist to have his work reproduced in needlepoint by a Sydney craft group. By day he is an Auckland architect. His book of architectural cartoons Did You Mean To Do That? was published in 2012.
Search for Walker, Malcolm in the NZ Cartoon Archive collection on the National Library of New Zealand website.