Philip is a Biostatistician, with a PhD in Biostatistics from UNSW Sydney and a Masters in Biostatistics from the University of Sydney. He currently works as a Biostatistician for the Prevention Research Collaboration at the University of Sydney, and is an Adjunct Lecturer with the National Drug and Alcohol Research Centre. He also conducts methodological research, with a particular focus on causal inference using observational data, and the use of machine learning in causal inference.