About the SOUTHERN CALIFORNIA REGIONAL CHAPTER

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)

SoCal RC Officer

Christine Hoffmaster, DABT

Associate Director, Preclinical Development
Ionis Pharmaceuticals

President

SoCal RC Officer

Patrick Allard, PhD

Professor
University of California, Los Angeles

Vice President

SoCal RC Officer

Courtni Newsome, PhD

Associate Director/Immunotoxicology
Johnson and Johnson Innovative Medicine

Vice President-Elect

SoCal RC Officer

Amy Tran-Guzman, PhD

Senior Scientist
Bristol Myers Squibb

Secretary

SoCal RC Officer

Heather Estrella, MS

Scientific Director
Amgen

Treasurer

SoCal RC Officer

Tejas Lahoti, PhD, DABT

Principal Scientist
Atrium Therapeutics

Past President

SoCal RC Officer

Elana Elkin, PhD, MPH

Assistant Professor of Environmental Health
San Diego State University

Councilor

SoCal RC Officer

Kristin Holbrook, MS PhD

Senior Principal Scientist
Johnson & Johnson

Councilor

SoCal RC Officer

Rajat Gupta, MS, PhD

Postdoctoral Fellow
University of California, Los Angeles

Postdoctoral Representative

SoCal RC Officer

Allen Louie

PhD Candidate
University of California, Los Angeles

Graduate Student Representative

SoCal RC Officer

Jocelyn Castellanos, MS

PhD Candidate
University of California, Los Angeles

Graduate Student Representative

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)