Janet Hook is a Professor in the Department of Public Health at the University of Otago. She is also also the co-Director of ASPIRE2025,  a research programme to support the New Zealand government's goal of a smokefree nation by 2025.

Janet is currently leading a second Marsden study probing identity shifts as smokers adopt vaping and potentially become both smoke- and vape-free. She has been a member of several NGO and government advisory groups, provided evidence to government and Select Committees, and was a member of an Australian government expert advisory group overseeing the introduction of plain packaging. She has sat on several research grant and selection committees, as well as strategy development and policy groups. She was Deputy Chair of the 2018 PBRF Business and Economics panel.