Cathy Zimmerman is a founding staff member of the Gender Violence & Health Centre at London School of Hygiene and Tropical Medicine. She is a social and behavioural scientist specialising in migration, health, human trafficking and gender-based violence. Professor Zimmerman conducted some of the first work on health and trafficking of women and adolescents and one of the largest studies to date with trafficking survivors in the Mekong. She currently leads the evaluation of the International Labour Organization's Work in Freedom programme in South Asia and previously conducted studies on exploitation and migrant health in Peru, Argentina, Bolivia and Kazakhstan and with modern slavery survivors for England's Department of Health. She is the author of the WHO Recommendations for Interviewing Trafficked Women, and the Caring for Trafficked Persons: Guidance for Health Providers. Professor Zimmerman previously worked in Cambodia, where she established the first local non-governmental organization against domestic violence.