[1] Cassey is an inaugural Australian Research Council Industry Laureate Fellow[2][3] ('Combatting wildlife crime and preventing environmental harm') and was previously an inaugural Australian Research Council Future Fellow (2010–2014).
[4] He leads the Invasion Science & Wildlife Ecology Group at the University of Adelaide, and is an advocate for diversity and inclusion.
[7] Cassey has co-authored over 340 scientific papers,[1] book chapters and other publications, and has been awarded eight Australian Research Council Discovery and Linkage Grants/Fellowships.
[8] He is a scientific communicator[9][10][11][12][13] and has written about invasion biology and environmental biosecurity at The Conversation.
[14] Cassey served as Head of the Ecology & Evolutionary Biology Department, University of Adelaide (2021–2023) and coordinated the University's Bachelor of Science Advanced program (2016–2022).