Meet the Regional Medical Center of San Jose executive team


Kenneth West, president and chief executive officer

Kenneth West, CEO, is a seasoned leader with more than 12 years of hospital leadership experience with HCA Healthcare. He first joined Regional Medical Center in 2018 as the chief operating officer. Ken has a wealth of industry knowledge including service line development, operations, strategic planning, technology evaluation and strong leadership development. He is deeply committed to strengthening employee engagement and culture, as well as continuing to provide excellence in patient care and operations.

Prior to joining Regional, Ken served as vice president, chief operating officer and ethics & compliance officer at HCA’s Medical Center of Trinity in Trinity, Florida. Before that, he was associate chief operating officer at Chippenham & Johnston-Willis Medical Center in Richmond, VA.

Ken earned a Master’s of Science Degree in Health Systems Administration from Georgetown University in Washington, D.C. He also holds a Bachelor of Science Degree in Nutritional Sciences from Louisiana State University.


Tarannum Guller, MD, chief medical officer

Tarannum Guller, MD, chief medical officer, is an Internal Medicine trained, career hospitalist, most recently serving as a senior executive providing hospitalist and intensivist services across California and the country. Dr. Guller received her medical degree from the Pravara Institute of Medical Science and completed her residency at Newton-Wellesley Hospital.

She has a Masters in Medical Management from Carnegie Mellon University and was Chief Resident for the Tufts-Harvard combined residency program.

Dr. Guller is patient centric and brings a passion for world-class quality and service.


PJ Thrasher, chief financial officer

PJ Thrasher joined Regional Medical Center as the chief financial officer in September 2021. Prior to joining Regional, he served as the associate CFO with HCA Houston Healthcare Kingwood in Texas. PJ had financial oversight for the 458- bed facility and served as the executive lead for accounting, case management, and the registration departments as well as various projects and committees. He has held a variety of leadership roles at other HCA hospitals including vice president of finance for the Woman's Hospital of Texas in Houston and as a division controller for the HCA Physician Services Group.

PJ received his Masters of Business Administration from Benedictine University in Illinois and a Bachelor of Business Administration degree from Austin State University in Texas.


Nanette Logan, DNP, CCRN-K, NE-BC, chief nursing officer

Nanette Logan, chief nursing officer, joined Regional Medical Center in 2021 after serving in nursing and nursing leadership roles at other HCA Healthcare hospitals since 2007. Most recently, Nanette served as the associate chief nursing officer at Riverside Community Hospital in Riverside, California. She was previously the director of critical care services at Los Robles Regional Medical Center in Thousand Oaks, California. Nanette is committed to improving the outcomes of patients by engaging front-line nurses to maximize their critical thinking skills, and advocate for high-quality, safe care.

Nanette is currently serving a three-year term as a director on the American Association of Critical-Care Nurses Certification Corporation board of directors. She also served on the HCA Critical-Care Advisory Board. Nanette holds a Doctor of Nursing Practice in executive nursing leadership at University of Nevada, Reno and a Master of Science in Nursing from the University of San Francisco.


Mark Amox, chief operating officer

Mark Amox joined Regional Medical Center as our new Chief Operating Officer in September 2021. He brings more than 20 years of leadership experience to the team. His most recent role was at Sunrise Hospital where he served as the COO for the Children’s Hospital and Women’s Services. Mark also served as the CEO of El Paso Children’s Hospital in Texas, as well as the COO of University of Florida Health Shands Children’s Hospital and Psychiatric and Rehab Hospital.

Mark earned a Masters in Healthcare Administration and in Business Administration from the University of Houston-Clear Lake. He also holds a Bachelor of Arts from Henderson State University in Arkansas. Mark is board certified in healthcare management, a Fellow in the American Colleges of Healthcare Executives and a Certified Medical Practice Executive in the American College of Medical Practice Executives.