Award winning toxicologist and scientist. 10+ years’ experience as a toxicologist employed by the Environmental Protection Agency (EPA). Served as EPA’s senior toxicologist in the waste management division working on risk and soil cleanup. Expertise in toxicology, risk assessment, mathematical modeling, statistics, neuroscience, and environmental/ecological health issues. Extensive national and international public speaking experience. 15+ years teaching experience. Well published, including author of textbook on toxicology and environmental risk assessment. Experienced expert witness on issues including environmental risk, drug and alcohol cases, DUI, accidental poisoning, and intellectual property. 10+ years consulting experience. Expertise in dioxin-like chemicals and polychlorinated biphenyls (PCBs).
Areas of Expertise
- Environmental & Science
- Environmental Toxicology
- Hazardous Materials
- Q: Please list your professional accreditations, degrees, licenses, and certificates granted:
- A: Diplomate of the American Board of Toxicology
- Q: Please list your affiliations or memberships in any professional and/or industry organizations:
- A: Society of Toxicology
- Q: Please list any teaching or speaking experience you have had, including subject matter:
- A: • 2016 “Bayesian Methods for Application of Uncertainty Factors,” Society of Toxicology Annual Meeting, New Orleans, LA
• 2016 “Quantitative Prediction of Phenotypic Change from High Throughput Assay Results,” EPA Workshop on In Vitro to In Vivo Extrapolation, February, Research Triangle Park, NC
• 2015 “Bayesian Methods for Application of Uncertainty Factors,” Society for Risk Analysis Annual Meeting, Arlington, VA
• 2015 “A New Look at Toxicity Factors for Toxaphene related to Fish Consumption in the Great Lakes,” Presentation to The Great Lakes Consortium for Fish Advisories
• 2014 “Quantitative Key Event Relationships in the Adverse Outcome Pathway (AOP) for AHR-Mediated Rodent Liver Tumor PromotionQuantitative Key Event Relationships in the Adverse Outcome Pathway (AOP) for AHR-Mediated Rodent Liver Tumor Promotion,” Invited Speaker at a meeting sponsored by the National Institute of Environmental Health Sciences held in Bethesda, MD
• 2014 “Evidentiary Standards for Neuroactive and Neurotoxic Drug Testing” Invited Speaker in a workshop at the 2014 meeting of the Society of Toxicology.
• 2013 “Current Outlook for Improving Uncertainty and Risk Communication.” Invited Speaker at Understanding and Communicating Uncertainty in Hazard Assessment, a workshop sponsored by the Center for Advancing Risk Assessment Science and Policy (ARASP) of the American Chemistry Council (ACC).
• 2013 Four Lectures in Graduate Level Environmental Risk Assessment and Risk Communication, University of Georgia, Athens, GA, Spring 2013
• 2012 Four Lectures in Graduate Level Environmental Risk Assessment and Risk Communication, University of Georgia, Athens, GA, Spring 2012
• 2011 “The Toxic Equivalence Factor for 2,3,7,8-Tetrachlorodibenzofuran: Chemical-Adjustment Factors for Addressing TEF Uncertainty.” Dioxin 2011, Brussels, Belgium, August 23, 2011
• 2010 “Linear vs. Nonlinear Extrapolation for Dose-Response Assessment of TCDD,” Dioxin 2010, San Antonio, TX, September 15
• 2010 “Using Human in vivo AHR Activation as a Functional Dose Metric for Risk Assessment Based on Chloracne, Effects in Keratinocytes and Background CYP Induction,” Dioxin 2010, San Antonio, TX, September 13
• 2009 “Dose Thresholds in Cancer Risk Assessment: Yes, they do exist.” University of Georgia, Department of Environmental Health Science, Athens, GA, October 26
• 2008 "Toxaphene – How Bad is this Pesticide?" University of Georgia, Department of Environmental Health Science, Athens, GA, October 9
• 2008 "Nagging Questions about PCBs" University of Georgia, Department of Environmental Health Science, Athens, GA, October 7
• 2008 "Toxicology of Polychlorinated Biphenyls (PCBs)," Georgia Power Toxic Substances Control Act Training, Georgia Power Headquarters, Atlanta, GA, July 24.
• 2008 “Neurotoxic Modes of Action of Polychlorinated Biphenyls and Brominated Flame Retardants: Implications for Environmental Regulation”, National Institute of Environmental Health Science 5th PCB Workshop: New Knowledge gained from old pollutants, May 16-22, Iowa City, IA, invited by Dr. P.R.S. Kodavanti
• 2007 “Neurotoxic Equivalence Scheme of Relative Potency for Assessing the Risk of PCB Mixtures,” Dioxin 2007, Tokyo, Japan, invited by Dr. P.R.S. Kodavanti of EPA, September.
• 2007 “Probabilistic Risk Assessment and Exposure,” University of Georgia, Department of Environmental Health Science, Athens, GA
• 2006 “Toxaphene – the World’s Most Misunderstood Pesticide,” University of Georgia Department of Environmental Health Science Seminar Series, Athens, GA
• 2005 "Regulatory Perspectives on Probabilistic Risk Assessment.” Society for Risk Analysis and Interstate Regulatory Council Workshop. Michigan State University, East Lansing, Michigan
• 2004 “New Directions in Environmental Issues: an EPA Perspective.” Panel Discussion at the Georgia Environmental Law Seminar, Saint Simons Island, GA
• 2003 "Probabilistic Approaches to Dose-Response Assessment." Lecture to EPA's Risk Assessment Forum, Washington, DC
• 2000 “ Probabilistic Risk Assessment: Step by Step,” Sponsored by NIEHS, EPA and the University of Florida, Safety Harbor, FL
• 1999 “EPA’s New Guidance on Citizen Involvement in Superfund Risk Assessment – What Lawyers and Risk Professionals Need to Know.” Panel Discussion at the Society of Risk Analysis Annual Meeting, Atlanta, GA
• 1999 “Calculating Cleanup Levels with Monte Carlo: Regulatory Concerns and Perspective.” Within a symposium organized by Scott Ferson, Society for Risk Analysis Annual Meeting, Atlanta, GA
• 1999 “Practical Issues in the Use of Probabilistic Risk Assessment and Its Application to Hazardous Waste Sites,” sponsored by NIEHS, EPA and the University of Florida, Sarasota, FL
• 1996 "Evaluating the Risk of Liver Cancer from Occupational Exposure to Trichloroethylene with PBPK Modeling and Monte Carlo Simulation.” Chemical Industry Institute of Toxicology, Research Triangle Park, NC
- Q: Have any of your accreditations ever been investigated, suspended or removed? (if yes, explain)
- A: No
- Q: On how many occasions have you been retained as an expert?
- A: 21 instance since 2000
5 testimonies or appearances
16 reports or written opinions
- Q: For what area(s) of expertise have you been retained as an expert?
- A: Toxicology, Environmental Regulation, Alcohol and drug abuse, DUI or DUID
- Q: In what percentage of your cases were you retained by the plaintiff?
- A: 20-30
- Q: In what percentage of your cases were you retained by the defendant?
- A: 70-80
- Q: On how many occasions have you had your deposition taken?
- A: 2
- Q: When was the last time you had your deposition taken?
- A: 2015
- Q: On how many occasions have you been qualified by a court to give expert testimony?
- A: 5
- Q: On how many occasions have you testified as an expert in court or before an arbitrator?
- A: 2
- Q: For how many years have you worked with the legal industry as an expert?
- A: 16
- Q: What services do you offer? (E.g.: consulting, testing, reports, site inspections etc.)
- A: Consulting, reports, deposition and testimoney
- Q: What is your hourly rate to consult with an attorney?
- A: $500
- Q: What is your hourly rate to review documents?
- A: $500
- Q: What is your hourly rate to provide deposition testimony?
- A: $500
- Q: What is your hourly rate to provide testimony at trial?
- A: $500
- Q: Please list any fees other than those stated above (E.g.: travel expenses, copy fees, etc.)
- A: Travel and other expenses
References upon request.