Iris Joosse was trained as a pharmacist at Utrecht University. Iris is currently a postdoctoral researcher and teacher at the division of Pharmacoepidemiology & Clinical Pharmacology at the Utrecht Institute of Pharmaceutical Sciences (UIPS). 

She obtained her PhD in 2024, which was focused on access to medicines in low- and middle-income countries, in which she developed better measures to monitor access to medicines for children, assessed the effects of pharmaceutical (pricing) policies on measures of access and use, and developed new approaches to study access to medicines from a health systems perspective. She conducted part of her PhD studies in Durban, South Africa. Her postdoctoral research focuses on the future of measuring access to medicines - adults and children - and novel ways of expressing affordability.

As a teacher, she is involved in the bachelor and master program of Pharmacy.