Puja trained as a public health specialist and epidemiologist following her initial clinical training and practice. She was then a public health academic in the University of Nottingham, working with real world data for many years before she joined CPRD. She is a fellow of the Faculty of Public Health (UK), a senior fellow of the Higher Education Academy (UK) and holds a PhD in Epidemiology. Puja has been at CPRD since April 2017 when she initially joined as Head of Observational Research. In October 2022, Puja was appointed as Director of CPRD.

"Even though I work primarily with healthcare data, as a public health specialist who recognises the importance of the wider socio-economic determinants of heath, administrative data can provide additional insights into health determinants and health inequalities, if they can be linked to healthcare data for public health research, within an appropriate data governance framework."