About the SoCal Regional Chapter
Founded in 1988, the SOT Southern California Regional Chapter is comprised of members living and working in cities such as Los Angeles, San Diego, Bakersfield, and Fresno, as well as other southern California locales.
View the SoCal Membership Directory
Officers (2026–2027)
Christine Hoffmaster, DABT
Associate Director, Preclinical Development
Ionis Pharmaceuticals
President
Patrick Allard, PhD
Professor
University of California, Los Angeles
Vice President
Courtni Newsome, PhD
Associate Director/Immunotoxicology
Johnson and Johnson Innovative Medicine
Vice President-Elect
Amy Tran-Guzman, PhD
Senior Scientist
Bristol Myers Squibb
Secretary
Heather Estrella, MS
Scientific Director
Amgen
Treasurer
Tejas Lahoti, PhD, DABT
Principal Scientist
Atrium Therapeutics
Past President
Elana Elkin, PhD, MPH
Assistant Professor of Environmental Health
San Diego State University
Councilor
Kristin Holbrook, MS PhD
Senior Principal Scientist
Johnson & Johnson
Councilor
Rajat Gupta, MS, PhD
Postdoctoral Fellow
University of California, Los Angeles
Postdoctoral Representative
Allen Louie
PhD Candidate
University of California, Los Angeles
Graduate Student Representative
Jocelyn Castellanos, MS
PhD Candidate
University of California, Los Angeles
Graduate Student Representative
Bylaws
View the SoCal Regional Chapter Bylaws.
Sites of Interest for SoCal Members
- CAL-EPA (California Environmental Protection Agency)
- CAT (California Association of Toxicologists)
- CERES (California Environmental Resources Evaluation System)
- CPCS (California Poison Control System)
- GETA (Genetic and Environmental Toxicology Association [of Northern California])
- PROP65 (California Proposition 65 Information)
- SCALACS (Southern California Section American Chemical Society)
- SoCal SETAC (Southern California Regional Chapter SETAC)