Dr Janet Lees is a Professor of Civil Engineering at the University of Cambridge and a Fellow of the Institution of Civil Engineers. Before embarking on a career in research, she spent time in Industry working both for a Consultant and for a Contractor. She received her PhD in Structural Engineering from the University of Cambridge. She is the leader of the Concrete Infrastructure Research Group (CIRG) within the Civil Engineering Division. The main research interests of her group relate to the development of more sustainable reinforced concrete infrastructure. Ongoing project areas include the strength assessment of existing infrastructure, tailored reinforced concrete infrastructure and the use of high performance materials in construction.

She is a Fellow of St John's College and a Director of the University of Cambridge EPSRC Centre for Doctoral Training in Future Infrastructure and Built Environment.