Gill is a specialist in engaged and inclusive research. She has worked in the global health field since 1991 where her experience is balanced between academia and the NGO sector. As an infectious-diseases immunologist, over 13 years Gill held senior positions at the London School of Hygiene and Tropical Medicine and the University of Stellenbosch. She led TB and HIV biomarker research at the Karonga Prevention Study in rural Malawi for five years before moving to South Africa in 2002.

In 2010, Gill co-founded the Sustainable Livelihoods Foundation (SLF), a non-profit public benefit organisation. As a director and head of Engaged Research at SLF, Gill has co-led numerous community engagement and community based participatory research projects on a range of topics including environmental disaster risk management. She has acquired extensive experience in ethics, co-production, visual methodologies, policy engagement and transdisciplinary research. Across her career Gill has published over 70 papers and has worked in multiple LMIC contexts including Kenya, Brazil, Malawi, Vietnam, Thailand and South Africa.

She is an associate researcher with the Ethox Centre at The University of Oxford. Through cross-sectoral collaborations and world-wide partnerships, she works to address health inequities and contribute to the development of practical, contextually relevant, community-driven strategies to strengthen public and global health.