Officers

2025–2026 Executive Committee

MSS Officer

Sucheta Mukherjee, PhD, DABT

Principal Scientist, Toxicologist Safety Assessment
Genentech, Inc.
President
MSS Officer

Hemant Chevan, PhD, DABT, ERT

Principal Scientist/Toxicologist
Genentech
Vice President
MSS Officer

Anna Engstrom, PhD, DABT

Senior Principal Scientist/Toxicologist
Genentech
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

Claire Neilan, PhD, DABT

VP and Head, Pharmacology and Toxicology
IDEAYA Biosciences
Past President
MSS Officer

Sunjay Sethi, PhD, DABT

Senior Principal Research Scientist
IDEAYA Biosciences
Councilor
MSS Officer

Maryam Tarazkar, PhD

Principal AI Scientist Safety Assessment
Genentech Inc.
Councilor
MSS Officer

Lo-Wei Lin, PhD

Postdoctoral Researcher
University of California, Davis
Postdoctoral Representative
MSS Officer

Heui Hye (Heehay) Park

Graduate Student
University of California, Davis
Graduate Student Representative

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