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SMMC: Leaders



San Mateo Medical Center is led by a talented team of strategic thinkers who have dedicated their careers to serving the community.

General information

Executive Management Team

Chief Executive Officer
Chester Kunnappilly, MD 

Chief Operations Officer 
John Thomas

Chief Financial Officer 
David McGrew

Chief Medical Officer
Susan Fernyak, MD 

Chief Nursing Officer & Deputy Director of Inpatient Services
Joan Gygax Spicer, RN, PhD

Chief Quality & Experience Officer
Alpa Sanghavi, MD

Deputy Director of Psychiatric Services
Liz Evans, RN

Deputy Director of Ambulatory Services
Brighton Ncube

Medical Director of Ambulatory Services
Jeanette Aviles, MD

Human Resource Manager
Angela Gonzales

General information

Medical Executive Committee


Chief of Staff
Bryan Gescuk, MD

Vice Chief of Staff
Julie Hersk, MD

Gordon Mak, MD

Immediate Past Chief of Staff
Janet Chaikind, MD

Department Chairs

Emergency Medicine
Chair: Kevin Tao, MD 
Vice Chair: Vacant

Chair: Bryan Gescuk, MD
Vice Chair: Brad Silver, MD

Primary Care and Community Medicine
Chair: Sylvia Espinoza, MD 
Vice Chair: Rebecca Ashe, MD

Chair: Katalin Szabo, MD
Vice Chair: VACANT

Chair: Scott Oesterling, MD
Vice Chair: David Jegge, MD

Members at Large

Rebecca Ashe, MD
Steve Hassid, MD
Vivian Levy, MD
Minesh Patel, MD
Chris Threatt, MD
Diana Wertz, MD

Affiliate Staff

Cama Lock
Sophie O’Shaughnessy, NP


Chester Kunnappilly, MD
CEO, San Mateo Medical Center