Officers

2026–2027 Executive Committee

MSS Officer

Hemant Chevan, PhD, DABT, ERT

Principal Scientist/Toxicologist
Genentech
President
MSS Officer

Anna Engstrom, PhD, DABT

Senior Principal Scientist/Toxicologist
Genentech
Vice President
MSS Officer

Katie Sokolowski, PhD, DABT, DSP, ERT/UKRT

Director of Toxicology
Septerna
Vice President-Elect
MSS Officer

Anna Kalashnikova, PhD

Staff Toxicologist
California Department of Pesticide Regulation
Secretary
MSS Officer

Howard Stock, PhD

Research Scientist
Gilead Sciences
Treasurer
MSS Officer

Sucheta Mukherjee, PhD, DABT

Principal Scientist, Toxicologist Safety Assessment
Genentech
Past President
MSS Officer

Sunjay Sethi, PhD, DABT

Senior Principal Research Scientist
IDEAYA Biosciences
Councilor
MSS Officer

Kelley Patten, MPH, PhD, DABT

Principal Scientist and Toxicologist
Genentech
Councilor
MSS Officer

Yi-Hua (Teresa) Tsai, PhD

Postdoctoral Researcher
University of California, Davis
Postdoctoral Representative
MSS Officer

Aishwarya Bhusal, BS

PhD Candidate
University of California, Davis
Graduate Student Representative

To contact the Northern California Regional Chapter Society of Toxicology leadership, please email SOT Headquarters.