Dinithi is an Associate Professor in Child and Family Welfare at the School for Policy Studies, University of Bristol. Dinithi has a background in developmental psychology, secondary data analyses and statistics. Prior to joining the University of Bristol in 2007, Dinithi was invited by UNICEF and the Ministry of Health of the Government of Sri Lanka to lead a study to adapt and standardise a developmental screening test, which established the first ever standardised developmental milestones for Sri Lankan children aged 0-6 years in Sri Lanka.

Dinithi has extensive experience of conducting research on children living in out-of-home care placements and of management and analyses of large datasets including Census microdata, longitudinal survey data  and longitudinal national administrative data on children in care. She is one of the first academic researchers in the UK to be given access to all national-level, longitudinal administrative datasets on children in care, held by the Department for Education and the Welsh Government. Dinithi is an ONS approved researcher and a previous recipient of an ESRC Future Research Leaders Award.

Dinithi is currently leading three studies on mental health of children in State care in England.