Graphic novelist.
An active supporter of trade unions, Wallman often focuses on questions of capitalism, collectivism, and trade unionism in his work. In 2017, Scribe announced that they had acquired his first book-length work, a collection of graphic essays on trade unionism.
In 2014, his collaborative piece At Work in Our Detention Centres: A Guard's Story was nominated for a Walkley Award.
In 2022, he was the recipient of the Maria Pallotta-Chiarolli Fellowship for a project (in collaboration with Jeff Sparrow) called 12 Rules for Strife, a long-form comic exploring different principles that might guide political organising within social movements.