Senior Toxicologist
at
Gradient
Dr. Cohen is a board certified toxicologist at the scientific consulting firm Gradient, with specialties in computational toxicology and human health risk assessment. At Gradient, his primary responsibilities include chemical hazard and risk assessment, consumer product safety evaluation, and non-clinical safety assessments of medical device and pharmaceutical components. Before joining Gradient, Dr. Cohen earned his doctoral degree at the Harvard School of Public Health, applying mathematical models to study the fate, transport and toxicity of nanoparticles in the lung and liquid suspensions used for in vitro toxicity screening. He has authored 23 publications including peer-reviewed articles, book chapters, and one patent, and presented his work to academic and general audiences. Dr. Cohen holds a Visiting Scientist appointment at the Harvard T. H. Chan School of Public Health where he researches the applications and human health implications of nanomaterials across the life cycle of nano-enabled products.