Keith Tolson, Ph.D.

Keith Tolson is a Senior Principal Environmental Scientist based in Florida with more than 15 years of experience focused on environmental sciences. He Specializes in the application of risk-based principles to support legal and regulatory requirements. Keith provides expert technical and strategic consultation on matters related to regulatory compliance and litigation. He also develops and supports public risk communication concerning the health effects of chemicals in air, water, soil, sediments, consumer products, and the workplace.

Nationally recognized for his expertise in the development of innovative risk-based approaches to address complex problems and relaying this information to stakeholders, Keith has broad experience in the application of RCRA and CERCLA guidance for reports submitted to the U.S. EPA and state regulatory agencies and has served as principal technical advocate for clients seeking to gain regulatory acceptance and site closure. He is skilled at using environmental forensic techniques and application of environmental statistics for cost-effective and scientifically defensible site assessment. He has provided mode-of-action evaluations and non-cancer and cancer toxicology assessments used to support risk-based remedial alternatives.

Prior to joining Geosyntec, Keith served for eight years as a consultant to the Florida Department of Environmental Protection, and is co-author of the Department's technical guidance for Brownfields, Drycleaning, Petroleum, and Soil & Groundwater Cleanup Target Rules. He was appointed by Florida Governor Charlie Crist to serve as toxicologist (2007-2011) for the Department of Agriculture and Consumer Services Pesticide Review Council which is charged with advising the Governor on issues related to the sale, use, and registration of pesticides in the State.. He has been active at the state and national level with the development of environmental statistics and toxicological evaluations of recalcitrant environmental contaminants including chlorinated solvents (e.g. TCE, 1,4 dioxane), metals (e.g. lead, chromium, mercury), dioxins, PCBs, pesticides, and PAHs.

To continue to advance the state of the practice, Keith serves as an adjunct professor at the University of Florida in the Center for Environmental and Human Toxicology. He teaches graduate courses in statistics, toxicology and risk assessment and has authored or coauthored over 100 technical publications in the field and serves as an editorial reviewer for several journals.

Contact Keith Tolson at This email address is being protected from spambots. You need JavaScript enabled to view it. or +1-813-558-0990.

Career Summary: Keith Tolson, Ph.D.

  • Specialties: Strategic consultation on matters related to regulatory compliance and litigation, public risk communication, health effects of chemicals in air, water, soil, sediments, consumer products, and the workplace
  • Practice Areas: Contaminated Site Assessment and Cleanup, Environmental Management, Building Health
  • Disciplines: Microbiology, Toxicological Sciences, Public Health, Natural Resources and Ecological Sciences
  • Education: Ph.D., Toxicology, University of Florida, College of Medicine, Department of Pharmacology and Therapeutics; M.S., Food Science and Human Nutrition (Pesticide Analytical Chemistry and Forensic Toxicology), University of Florida; B.S., Honors Interdisciplinary Science (Chemistry/Statistics), University of Florida

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Geosyntec Consultants
Geosyntec is a consulting and engineering firm that works with private and public sector clients to address new ventures and complex problems involving our environment, natural resources, and civil infrastructure.

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