Sanjay is an infectious diseases epidemiologist with extensive experience in vaccinology research and vaccination policy and program development. He is a Senior Research Fellow at the National Centre for Immunisation Research and Surveillance (NCIRS) and a Senior Lecturer of the Children’s Hospital at Westmead Clinical School, Faculty of Medicine, University of Sydney. He is also a National Health and Medical Research Council (NHMRC) Emerging Leadership Fellow. He currently chairs the Enhanced Invasive Pneumococcal Disease (IPD) Surveillance working group that oversees national IPD surveillance. Sanjay’s PhD was on pneumococcal disease epidemiology and effectiveness of pneumococcal vaccines.