Heather Klintworth, PhD, DABT

J.S. Held’s Inaugural Global Risk Report Examines Potential Business Risks & Opportunities in 2024

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Dr. Heather Klintworth specializes in human health risk assessments for a variety of chemicals, including personal care products, pharmaceuticals, and pesticides. Dr. Klintworth provides technical assistance in legal cases regarding toxicological exposures to drugs, alcohol, and other chemical and biological constituents. This includes defining toxicity, hazard and risk, dose-response evaluation, duration of exposure, and evaluation of toxicity data to assess the likelihood of adverse effects. Dr. Klintworth conducts comprehensive toxicity assessments for extractables / leachables in drug products for use in regulatory submissions using available toxicological data, read-across strategies, and QSAR analysis. She also conducts risk assessments for Generally Recognized as Safe (GRAS) and Letter of No Objection regulatory submissions to the US FDA and Health Canada, respectively.

Dr. Klintworth holds a Ph.D. in toxicology and is certified in toxicology by the American Board of Toxicology.

Dr. Klintworth is a Senior Toxicologist in the Environmental Health and Safety Service Line at J.S. Held. She manages and serves as technical support for projects involved in toxicology, human health risk assessment, and derivation of acceptable exposure limits.

Key Expertise

  • Toxicology
  • Human Health Risk Assessments
  • Chemical Exposures
  • Health-Based Exposure Limit Derivation
  • Personal Injury Claims
  • Alcohol & Drugs of Abuse Impairment Analysis

Professional Affiliations/Memberships/Licenses/Training

  • Diplomate of American Board of Toxicology (DABT) 2023
  • Society of Toxicology (SOT)
  • Pacific Northwest Association of Toxicologists (PANWAT)

J.S. Held is recognized as an ENR Top 200 Environmental Consulting Firm and industry leader in the Verdantix Green Quadrant for Sustainability & ESG Consulting.