Maria Bastaki, Ph.D. (Toxicologist)

Dr. Maria Bastaki is a toxicologist with over 10 years of experience in the field of toxicology and human health risk assessment. She excels at performing quantitative human health risk assessments and regulatory assessments for many types of products, including consumer products, cleaning products, cosmetics, dietary supplements, and pharmaceuticals. Prior to her employment at ToxServices, Dr. Bastaki was on the faculty of Evergreen State College, and conducted research and instructed courses in Risk Assessment and Environmental Health. Dr. Bastaki earned a Ph.D. in Pharmacology from the University of Patras, and was a Post-Doctoral Fellow at Johns Hopkins University.

Megan Boylan, M.S. (Associate Toxicologist)

Ms. Megan B. Boylan is an Associate Toxicologist who earned her M.S. in Biotechnology from Johns Hopkins University, Baltimore, Maryland. Previous to working for ToxServices, Ms. Boylan worked for The Geneva Foundation as a Laboratory Technician at the United States Army Medical Research Institute of Chemical Defense. Since joining ToxServices, Ms. Boylan has developed human health risk assessments for chemicals being added directly and indirectly to drinking water. Ms. Boylan reviews and evaluates the formulations of drinking water system components, drinking water treatment units, and drinking water treatment chemicals, and then determines compliance of these products with appropriate health-based standards. Ms. Boylan works on product evaluations for the U.S. Environmental Protection Agency's Design for the Environment Formulator Program. Ms. Boylan has extensive laboratory experience in both in vivo and in vitro investigational techniques in the areas of inhalation toxicology and genotoxicity.

Emily Campbell, M.F.S. (Associate Toxicologist)

Ms. Emily A. Campbell is an Associate Toxicologist who earned her M.F.S. in Forensic Toxicology from The George Washington University, Washington, D.C. Prior to working at ToxServices, she was employed by J.B. Laboratories in Holland, Michigan as a raw material chemist. Since joining ToxServices, her consultation experience involves the risk assessment of chemicals in products aimed at being designed for the environment, drinking water contaminants, and dietary supplements. Specifically, Ms. Campbell has evaluated several chemical formulations for submission to the U.S. EPA's Design for the Environment Program and screening of chemicals using Clean Production Action's GreenScreen for Safer Chemicals. In addition, she has prepared human health risk assessments for direct and indirect additives extracting from medical devices and municipal drinking water system components. She has also assisted in the preparation of several Provisional Peer-Reviewed Toxicity Value documents for the U.S. E.P.A.'s National Center for Environmental Assessment, as well as Health Effects Support Documents for the U.S. E.P.A's Office of Water.

Dr. Jennifer G. Fleischer (Toxicologist)

Dr. Jennifer G. Fleischer is a Toxicologist who earned her Ph.D. in Toxicology and M.H.S. in Environmental Health Sciences form Johns Hopkins University, Baltimore, MD. Prior to working at ToxServices, she was a Senior Scientist at Integral Consulting Inc., where she conducted comprehensive mode of action and carcinogenicity evaluations, conducted cancer and non-cancer quantitative human health risk assessments, and prepared technical comments on proposed regulatory actions. She also had experience as a project manager and toxicologist in in vivo and in vitro contract toxicology/pharmacology laboratories. Since joining ToxServices, Dr. Fleischer has prepared quantitative human health risk assessments on food allergens, prepared and reviewed safety evaluations of personal care products, prepared Material Safety Data Sheets (MSDS), and complied and reviewed toxicological evaluations of chemicals considered for regulation under EPA's Safe Drinking Water Act. Dr. Fleischer performs hazard assessments and modeling of chemicals using EPA's ECOSAR, EPI Suite, and Benchmark Dose Software, and conducts comprehensive literature searches in support of risk assessment, technical guidance documents, and toxicological evaluations. She has also performed initial and final toxicological reviews for products being evaluated under various NSF/ANSI standards.

Ann Marie Gebhart, M.P.H., Ph.D. (Vice President and General Manager)

Dr. Ann Marie Gebhart is a Senior Toxicologist and Risk Assessor who earned both her M.P.H. in Environmental and Industrial Health and Ph.D. in Toxicology from the University of Michigan. She has extensive experience in both the performance and management of product evaluations and human health risk assessments. Prior to joining ToxServices in 2008, Dr. Gebhart was Director of Business and Technical development of the Drinking Water Program at Underwriters Laboratories Inc. (UL) and chair of UL's Environmental and Public Health Council. From 1990 -1997, Dr. Gebhart held a number of positions at NSF International, including Vice President of Technical Operations and Director of Toxicology. Prior to joining UL in 1999, Dr. Gebhart served as Executive Officer of the American Society for Clinical Nutrition and managing editor of the American Journal of Clinical Nutrition in Bethesda, MD. At ToxServices, Dr Gebhart serves as the project manager and technical lead on the U.S. Environmental Protection Agency's Design for the Environment Formulator Program and Office of Water contract.

Susan Goldhaber, M.P.H. (Consultant)

Ms. Susan Goldhaber has 28 years of experience in environmental toxicology and environmental health. She received an MPH from the University of Michigan. Ms Goldhaber is skilled in reviewing and evaluating toxicological literature, and has worked on multiple projects for the EPA, National Institute of Environmental Health Sciences (NIEHS) and Agency for Toxic Substances and Disease Registry (ATSDR). For the EPA's National Center for Environmental Assessment (NCEA), Ms. Goldhaber has prepared a number of Toxicological Review Documents in support of IRIS; for EPA's Office of Water, she has prepared Health Effects Support Documents, Health Advisories, and risk assessment/water quality documents. She contributed a number of background documents for the 11th and 12th Report on Carcinogens for the NIEHS and she authored Toxicological Profiles for ATSDR.

Ellen Lee, M.H.S. (Consultant)

Ms. Ellen Lee is a toxicologist with 6 years of professional experience. She graduated with an MHS from Johns Hopkins School of Public Health, where she also completed the Certificate of Risk Sciences and Public Policy. Ms. Lee previously worked at Health Canada performing chemical health risk assessments in both food and drinking water and overseeing environmental health content in nationally-representative biomonitoring surveys. She has a background in environmental health sciences, toxicology, epidemiology, and risk assessment.

Callie Taylor (DfE Coordinator)

Ms. Callie Taylor is an enviromental scientist who graduated from the University of North Carolina Wilmington with a B.S. in Environmental Science and Marine Biology. Previous to working with ToxServices, Ms. Taylor was an intern with New Hanover Soil & Water Conservation District where her focus was on environmental education and contract management for Best Management Practices to improve area water quality. Ms. Taylor coordinates DfE submissions and audits, and also serves as a part of contact for DfE and CleanGredients reviews.

Kristen Schaefer, M.F.S. (Associate Toxicologist)

Ms. Kristen M. Schaefer is an Associate Toxicologist who earned her M.F.S. in Forensic Toxicology from The George Washington University, Washington, DC. Prior to working at ToxServices, she was a Senior Certified Laboratory Assistant at Merial Limited in Athens, GA, where she produced antibodies for veterinary vaccines. Since joining ToxServices, Ms. Schaefer has helped to develop ToxServices' program for reviewing product formulations for submission to the Environmental Protection Agency's Design for the Environment (DfE) Safer Product Labeling Program. Ms. Schaefer performs hazard assessments and modeling of chemicals using EPA's ECOSAR and EPI Suite software, and conducts literature searches for risk assessments, technical guidance documents, and toxicological evaluations. She has developed human health risk assessments of direct and indirect additives extracting from drinking water distribution systems and drinking water treatment units. She has also performed initial and final toxicological reviews for products being evaluated under various NSF standards.

Christopher Schlosser, M.F.S. (Associate Toxicologist)

Mr. Christopher E. Schlosser is an Associate Toxicologist who earned his M.F.S. in Forensic Toxicology from The George Washington University, Washington, D.C. Prior to working at ToxServices he was a Graduate Teaching Assistant at The Catholic University of America in Washington, D.C., where he taught undergraduate laboratory courses in chemistry. Since joining ToxServices, Mr. Schlosser has helped to develop ToxServices' program for reviewing product formulations for submission to the Environmental Protection Agency's Design for the Environment (DfE) Safer Product Labeling Program. Mr. Schlosser has developed human health risk assessments of direct and indirect additives extracting from drinking water distribution systems and drinking water treatment units. He has also performed initial and final toxicological reviews for products being evaluated under various NSF standards.

Margaret H. Whittaker, Ph.D., M.P.H., CBiol., F.S.B., E.R.T., D.A.B.T. (Managing Director and Chief Toxicologist)

Dr. Whittaker has over seventeen years of experience in both the performance and management of toxicology and human health risk assessment-related projects. She is currently the Managing Director and Chief Toxicologist of ToxServices LLC, where she serves as the project manager and technical lead of ToxServices projects for the United States Environmental Protection Agency, international certification organizations, testing laboratories, and consumer products companies that manufacture and test products such as cleaning chemicals, fragrance agents, cosmetics, dietary supplements, food additives, drinking water additives, and drinking water system components. As project manager and technical lead for contracts with these organizations, Dr. Whittaker has contributed to and/or managed the development of 500 human health risk assessments, as well as hundreds of product-specific toxicology evaluations. Dr. Whittaker is a Diplomate of the American Board of Toxicology who earned a Ph.D. in Toxicology from The University of Maryland, Baltimore and an M.P.H. in Environmental Health from The University of Michigan. Dr. Whittaker is a U.K./Eurotox Registered Toxicologist, as well as a Chartered Biologist and Fellow of the U.K. Society of Biology. Dr. Whittaker has built her career on a foundation grounded in leadership and adherence to details and timelines. One of her first career awards (1992) was a United States Coast Guard Commandant’s Award for Outstanding Civilian Service, where her “alacrity and tenacity” displayed while working on projects associated with the Oil Pollution Act of 1990 were officially recognized. In addition to her extensive program management experience, Dr. Whittaker has extensive technical experience in hazard identification and non-cancer and cancer dose-response assessment, including quantitative risk assessment (e.g., benchmark dose modeling for both carcinogens and non-carcinogens). Prior to creating ToxServices, she worked at two of the country’s leading toxicology and risk assessment consulting firms (The ENVIRON Corporation and The Weinberg Group).

Bonnie Williams, B.A. (Environmental Research Scientist)

Ms. Bonnie J. Williams is an Environmental Research Scientist who earned her B.A. in Environmental Studies from Catawba College, Salisbury, North Carolina. Previous to working for ToxServices, Ms. Williams worked for Alpha EMC as an Environmental Analyst. She also contributed to a study conducted by SCS Engineering as a Wastestream Analyst. Since joining ToxServices, Ms. Williams has performed initial toxicological reviews for products being evaluated under various NSF standards. Ms. Williams also reviews and summarizes scientific reports, conducts Internet and library searches, and maintains databases for literature as well as product formulations. She has worked with clients under the Environmental Protection Agency's Design for the Environment (DfE) Safer Product Labeling Program while providing administrative support to ToxServices' scientific staff as well as performs office administration duties.

Mouna Zachary, Ph.D. (Toxicologist)

Dr. Mouna Zachary is a chemist who specializes in the use of Quantitative Structure Activity Relationship (QSAR) software to help businesses assess and predict the the behavior of chemical compounds in environmental systems. Dr. Zachary conducts PBT, endocrine disruptor, and mutagenicity screenings for chemicals of interest, and excels in comparative hazard assessment. She has expertise in both European and North American regulations pertaining to chemicals, and has conducted numerous workshops pertaining to REACH compliance and appropriate use of QSAR software.