Nancy B. Hopf received her PhD in Occupational and Environmental Health, specializing in biological monitoring, from the University of Cincinnati (UC), College of Medicine, USA, and her MSc in synthetic organic chemistry from the University of Oslo, Norway. She heads the exposure science group at the Institute for Work and Health (IST), Switzerland. Current research interests are elucidating human inhalation toxicokinetics of chemicals using an exposure chamber and human skin penetration using flow-through diffusion cells, and validating these data with occupational hygiene data collected among workers. Previous positions include evaluating toxicology, exposure, and epidemiological evidence for classification of carcinogens for the International Agency for Research Cancer (IARC); performing retrospective exposure assessments for workers exposed to polychlorinated biphenyls (PCBs) and phthalates (DEHP, DBP, BBP, DEP) among current manufacturing workers for the National Institute for Occupational Safety and Health (NIOSH) as a research fellow; modeling polycyclic aromatic hydrocarbon (PAH) exposure trends in the primary aluminum industry and offshore oil production as a fellow and PhD student at university of Cincinnati, performing risk assessments and representing Norway in EU labeling and risk assessment groups as a regulatory official for the Norwegian Directorate for Labour Inspection. Dr. Hopf supervises PhD and master students at University of Lausanne where she holds a privat docent.