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President
Jennifer Hsieh
Jennifer.Hsieh@oehha.ca.gov
Jennifer Hsieh, Ph.D., D.A.B.T. is a Staff Toxicologist (Specialist), in the Branch of Reproductive and Cancer Hazard Assessment, Office of Environmental Health Hazard Assessment (OEHHA), California Environmental Protection Agency (CalEPA) since 2007. Her work specializes in cancer hazard identification and carcinogen risk assessment. She received her B.S. and M.S. degrees in pharmacological science and her Ph.D. from the Environmental Toxicology Program at Michigan State University. She did her post-doctoral training at the Cancer Center, UC Davis. Before OEHHA her research focused on investigating the potential mechanisms of carcinogenesis in breast and prostate cancers. Before her Presidency, Jennifer served as the GETA Treasurer. |
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President-Elect
Anna Kalishnikova
Anna.Kalishnikova@dpr.ca.gov
Bio to come. |
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Past President / Website Officer
Sarah Elmore
Sarah.Elmore@oehha.ca.gov
Sarah Elmore, Ph.D. is an Associate Toxicologist with the Cancer Toxicology and Epidemiology Section of the Office of Environmental Health Hazards Assessment (OEHHA). Sarah's work is focused on cancer hazard identification and risk assessment. Prior to starting her work at OEHHA in 2018, Sarah was a Post-Doctoral Researcher at UC Davis where she investigated the toxicity and carcinogenicity of personal care products and pesticides. Sarah received her Bachelors in Biomedical Science (2010) and PhD in Toxicology (2016) from Texas A&M University. Sarah served as the 2018-2020 GETA Secretary, 2021-2022 GETA President, and is an active member of the Society of Toxicology. She lives in Santa Cruz with her husband and toddler where they enjoy surfing, hiking, biking and fishing. |
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Treasurer
James Nakashima
James.Nakashima@oehha.ca.gov
As a toxicologist for the Pesticide Environmental Toxicology Branch in the Office of Environmental Health Hazard Assessment, Dr. Nakashima serves as an exposure assessor and expert on pesticide-related illness reporting. Previously, he managed a pre-clinical drug discovery program for Solanan, Inc., and held a faculty position at Brown University in the Department of Pathology and Laboratory Medicine. James received his PhD in Comparative Pathology from UC Davis, and postdoctoral training at Letterman Army Institute of Research and Brown University. His scientific interests include vascular peptide biology, pathogenesis of pulmonary fibrosis and sepsis, and regulation of the immune system.James served as GETA President from 2020-2021. |
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Secretary/Newsletter Editor
Chunbo Zhang
Chunbo.Zhang@cdpr.ca.gov
Chunbo Zhang is an Associate Toxicologist at Human Health Assessment Branch at California Department of Pesticide Regulation. She received her Ph.D in Zoology at University of Manitoba, Canada. Her expertise in neuroscience, molecular biology, developmental biology and cancer biology has been valuable in evaluating toxicity studies and conducting human risk assessment. She likes to read and is keen to testing new ideas for better living. |
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Member at Large
Vanessa Cheng
Vanessa.Cheng@oehha.ca.gov
Vanessa Cheng, Ph.D. is an Associate Toxicologist in the Cancer Toxicology and Epidemiology section of the Office of Environmental Health Hazard Assessment (OEHHA) and works on cancer hazard identification and risk assessment. Vanessa earned her Bachelor’s in Biology (2017) and PhD in Environmental Toxicology (2021) from the University of California, Riverside, where she investigated the effects of nuclear receptors activation during early stages of development in zebrafish and receptor-mediated genomic, transcriptomic, and metabolomic alterations in human liver carcinoma cells. |
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University Representative
Weihong Guo
wguo@berkeley.edu
Weihong Guo, M.S, is a Research Specialist and Lab Manager at Children's Environmental Health
Laboratory and Berkeley Public Health Biorepository, UC Berkeley. Her academic work focuses on
biobanking, molecular epidemiology, epigenetics and studying children’s health in relation to
environmental exposures using biomarkers of obesity, oxidative stress, inflammation, and cognitive
functions. Before she returned to UC Berkeley, she specialized in analytical chemistry conducting
biomonitoring studies on organic pollutants such as PBDE, PCBs, and organic pesticides, and cannabis
testing at CA Department of Toxic Substances Control, Department of Public Health, and Department of
Cannabis Control. She received her Master of Science degree in Environmental Health Sciences from UC
Berkeley. |
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University Representative
Gabrielle Rigutto
grigutto@berkeley.edu
Bio to come. |
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Government Representative
Kim Truong
Kim.Truong@cdpr.ca.gov
Bio to come. |
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Business Representative
Brett Winters
bwinters@cytokinetics.com
Brett Winters, PhD, CIH is a project toxicologist in the Toxicology & Safety Pharmacology
group at Cytokinetics Inc, a biopharmaceutical company focusing on cardiovascular and
musculoskeletal therapies. He specializes in designing, coordinating, monitoring, and reviewing
IND-enabling and NDA-enabling toxicology and safety pharmacology. Brett also serves as the
course director and lecturer of “Introduction to Toxicology” at California State University, East
Bay. He received his B.S in Environmental Toxicology from UC Davis, and his PhD in
Toxicology from the University of North Carolina at Chapel Hill. |
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Post-Doc Representative
Dorothy You
djyou@ucdavis.edu
Bio to come. |
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Student Representative
Vacant
If interested in this position, please contact Jennifer Hsieh for most information. |