His research focuses on development of novel cyber defence algorithms and systems against emerging attacks such as APT, DDoS and disinformation with the aid of various mathematic techniques including optimal control, game theory, graph theory, and dynamical system theory. He has initiated the node-level epidemic modelling of APT attack/defence and the optimal control/differential game-based APT defence, which significantly enhances the defence performance. Another recent research highlight lies in the first-ever rigorous analysis of multiple virus (e.g., competing malware, competing opinions/products) spreading over complex networks, laying the theoretical foundation for supressing malware/rumour spreading and promoting WOM marketing. To date, he has published over 80 papers in top-tier journals including IEEE TIFS, IEEE TDSC, IEEE TSMC, and IEEE TNSE, with Google scholar citations 2900+ and h-index 31. He has been recognised among Australia’s top 40 early career researchers by The Australian’s 2021 Research Magazine.