John is a Principal Scientist at IOM and Professor of Human Health at Heriot Watt University. He is a former President of the British Occupational Hygiene Society. His research interests include human exposure assessment, environmental and occupational epidemiology, natural and synthetic fibres – including asbestos, dermal exposure to chemicals and dermatitis, and particulate air pollution. He also prepares medico-legal reports in relation to dust and chemical exposures, particularly to do with workplace cancer risks and occupationally-related neurodegenerative disease.