I work in the Discrete Mathematics Research Group of the School of Mathematical Sciences at Monash University in Melbourne, Australia. I am also co-Director of the Mathematical Research Institute MATRIX.

My research interests lie in discrete mathematics and theoretical computer science, especially structural graph theory, extremal graph theory, geometric graph theory, graph colouring, graph drawing, and combinatorial geometry. Here are a few of my favourite open problems.

#### News

- My PhD students Kevin Hendrey and Tim Wilson have submitted their PhD theses, September 2018
- New paper Defective and clustered colouring of sparse graphs with my student Kevin Hendrey, June 2018
- New paper Better bounds for poset dimension and boxicity with Alex Scott, April 2018
- Completed dynamic survey Defective and clustered graph colouring, April 2018
- Joined the Steering Committee of the Free Journal Network, February 2018
- New paper Seymour's conjecture on 2-connected graphs of large pathwidth with Tony Huynh, Gwenaël Joret and Piotr Micek, January 2018
- New paper Clustered colouring in minor-closed classes with Sergey Norin, Alex Scott and Paul Seymour, August 2017
- New paper Bad news for chordal partitions with Alex Scott and Paul Seymour, July 2017