Nancy M. McClellan

Nancy M. McClellan, M.P.H., CIH, CHMM is an industrial hygiene and safety expert specializing in workplace chemical, biological, and physical health and safety hazards in high hazard industries. With a career encompassing international program management, advisory board leadership, and technical authorship, she brings a strategic and globally informed perspective to her litigation work. Her work centers on investigating bioaerosol and pandemic particulate controls, assessing chemical and non-chemical disinfectant exposure risks, and evaluating facility pandemic resilience.

Ms. McClellan has been retained in numerous expert witness and consulting engagements across the United States, involving cases in industries such as pharmaceuticals, construction, and healthcare. Her Master of Public Health in Industrial Hygiene, along with certifications from the American Board of Industrial Hygiene and the Institute of Hazardous Materials Management, reinforce her ability to deliver objective, defensible analyses. She is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of causation in disputes involving occupational hygiene and safety program compliance.