DaviD M. Lehmann , PhD

 dlehmann@intertox.com 

David Lehmann, Ph.D., is a leading expert in toxicology who joined Intertox in 2025 as a Senior Toxicologist. With nearly two decades of experience spanning academia, industry, and government, Dr. Lehmann excels in evaluating the potential human health risks caused by environmental pollutants, alcohol and drugs, medical devices, and consumer products. His accomplishments include both rigorous investigational laboratory studies and comprehensive written assessments. Renowned for his expertise in scientific assessments and communication, Dr. Lehmann has consistently demonstrated a proven track record of addressing complex scientific issues tailored to serving client needs with precision and clarity.

• Toxicology  & Ecotoxicology: Multidisciplinary experience base includes assessing      respiratory and contact hypersensitivity reactions, immunosuppression,      hematology, skin and eye irritation, cytotoxicity, and genotoxicity as well as assessing the effects of insecticides on pollinator health;
• Toxicological Risk Assessment: Expertise in human health risk assessment (e.g.,      pesticides, metals, medical devices) including weight-of-evidence approaches to causation analysis (e.g., Bradford Hill criteria); 
• Pharmacology and Cellular Mechanisms:  Expertise in human pharmacology and drug-related signal transduction pathways;
• New Approach Methodologies (NAMs) & International Validation: Contributor to ICCVAM, OECD expert  groups for developing new test guidelines (i.e., skin sensitization,  respiratory sensitization, immunotoxicology, skin and eye irritation), and  other international toxicity methods peer review groups for non-animal      testing methods;
• Experimental Design and Data Interpretation: Experience designing, conducting, and      interpreting in vivo and in vitro toxicology studies including those  designed to satisfy regulatory requirements; 
• Systematic  Review & Evidence Mapping: Skilled in conducting literature  searches, evaluating scientific data, and producing evidence maps and systematic reviews to support risk assessments; and
• Scientific  Writing & Communication: Excels at translating complex scientific      concepts for lay audiences, undergraduate and graduate students, industry      professionals, policymakers, and community stakeholders.

• Ph.D. and M.S., Toxicology, University of Rochester School of Medicine & Dentistry
• B.S., Biology Colorado State University
• Post-doctoral  Appointment, Pharmacology, University of Rochester School of Medicine      & Dentistry