Professor Pereira is a perinatal epidemiologist, environmental health researcher and biostatistician in the discipline of Epidemiology and Biostatistics at the School of Public Health, Curtin University. He served as Dean of Research for the Faculty of Health Sciences, held several NHMRC fellowships (EL2, Sidney Sax) and is currently a Professor of Epidemiology and Biostatistics. In earlier roles, he held positions in the Center for Perinatal, Pediatric and Environmental Epidemiology at Yale University and the Yale School of Environmental Studies. He has served on multiple National Health and Medical Research Council fellowship and project grant review panels such as for the European Commission's Horizon Europe. He previously served as a member of the national scientific advisory committee for the Red Nose Foundation and the Scientific Committee for the Perth Children's Hospital Foundation and until 2020 was chair of the Western Australian Perinatal Epidemiology Group. He leads large international studies to review clinical guidelines of the World Health Organization, to evaluate effectiveness of vaccinnation in pregnancy, to investigate the influence of air pollution and and climate change on children's health, and to develop prognostic and prediction models for vaccination, stillbirth and perinatal morbidity using machine learning and big data.