| Chair Professor of Statistics | (2024 – ) | Department of Statistics & Actuarial Science, HKU |
| Patrick Poon Endowed Professor | (2018 – ) | Endowed Professorship in Statistics and Actuarial Science |
| Associate Director | (2024 – 2025) | School of Computing & Data Science, HKU |
| Chair in Statistics | (2023 – 2024) | Department of Mathematics, Imperial College London, UK |
| Head of Department | (2017 – 2023) | |
| Professor | (2014 – 2018) | Department of Statistics & Actuarial Science, University of Hong Kong |
| Associate Professor | (2009 – 2014) | Department of Statistics & Actuarial Science, University of Hong Kong |
| Associate Professor | (2008 – 2009) | Department of Biostatistics, University of Texas M.D. Anderson Cancer Center |
| Assistant Professor | (2003 – 2008) | Department of Biostatistics, University of Texas M.D. Anderson Cancer Center |
| Deputy Editor | (2020 – 2023) | Contemporary Clinical Trials |
| Associate Editor | (2012 – 2020) | Contemporary Clinical Trials |
| Associate Editor | (2018 – 2021) | Japanese Journal of Statistics and Data Science |
| Associate Editor | (2018 – 2020) | Statistical Analysis and Data Mining |
| Associate Editor | (2013 – 2018) | Journal of American Statistical Association |
| Associate Editor | (2009 – 2015) | Bayesian Analysis |
| Novel Adaptive Clinical Trial Designs for Immunotherapy | 2019 International Society for Biopharmaceutical Statistics, Kyoto, Japan |
| Adaptive Methods for Modern Clinical Trials | 2015 Joint Statistical Meeting, Seattle, USA |
| Adaptive Methods for Modern Clinical Trials | 2014 Joint Statistical Meeting, Boston, USA |
| Clinical Trial Design: Overview and New Development | 2012 Osaka University, Osaka, Japan |