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Senior Leadership

Richard Van Etten, MD, PhD
Principal Investigator, Director

Marian Waterman, deputy director, Chao Family Comprehensive Cancer Center
Marian Waterman, PhD
Deputy Director & Associate Director for Basic Science

Dr. Susan O'Brien, Associate Director for Clinical Science, UC Irvine Chao Family Comprehensive Cancer Center
Susan O'Brien, MD
Associate Director for Clinical Science
Medical Director of the Sue and Ralph Stern Center
for Cancer Clinical Trials and Research

Lari Wenzel, PhD
Associate Director for Population Science & Cancer Control

Amy Barach
Amy Barach
Associate Director for Administration & Finance/CAO

Edward Nelson, MD
Chief, Division of Hematology/Oncology

Leonard Sender, MD 
Medical Director of Cancer Services


Alessio Pigazzi, MD, PhD
Chief, Division of Colon and Rectal Surgery

Dan Cooper, MD
Director, Institute for Clinical and Translational Sciences

Frank L. Meyskens, MD
Director Emeritus

Hung Fan, PhD, Chao Family Comprehensive Cancer Center senior advisor
Hung Fan, PhD
Cancer Center Senior Advisor

Nancy Eagan, RN
Senior Director of Cancer Operations

Brian McClendon, assistant director of administrative programs
Brian McClendon
Assistant Director of Administrative Programs/Internal Contact