Board of Trustees and Officers 2026

Dora Barilla, DrPH

Dora Barilla has served on the San Antonio Regional Hospital Board of Trustees since February 2020. With more than 35 years of experience in healthcare leadership, she is dedicated to advancing community health and innovative care strategies. She is the President and Co-Founder of HC2 Strategies, a national consultancy dedicated to helping health systems and organizations create sustainable, purpose-driven health improvement strategies.

Edward DiGiamarino, M.D.

Dr. DiGiamarino has served as a member of the Board of Trustees since August 2024. He was appointed to the Medical Staff of San Antonio in 1987 and during his tenure served as an ex officio member of the Board of Trustees from 2002 through 2004, and again from 2018 through 2020, including President of the Medical Staff. Dr. DiGiamarino is Board Certified in Anesthesiology.

Mary Lopez, RN, MSN, PHD

Mary Lopez has served on the Board of Trustees since July 2020. Dr. Lopez currently serves as the Dean of the College of Graduate Nursing at Western University. She has practiced in a variety of nursing settings over the past 25+ years and has been teaching second career students since 2004 in both pre-licensure and graduate levels. Dr. Lopez is certified as a public health nurse and a legal nurse consultant.

Bob Mendez

Bob Mendez has served on the Board of Trustees since July 2020. Mr. Mendez currently serves as a Business Administration Professor at Whittier College. He was an accomplished television industry attorney who held senior-level positions with global entertainment companies managing business affairs, legal affairs, contract administration, as well as serving as chief diversity officer.

John T. Chapman

John T. Chapman joined the hospital as Chief Operating Officer in October 2018 and was appointed President and Chief Executive Officer in May 2020. He is a microbiologist by training previously served as Chief Operations / Administrative Officer at Highland Hospital in Oakland, CA and also led the clinical and support services for the Alameda Health System.

Nima Naimi, D.O.

Dr. Naimi is an ex officio member of the Board of Trustees, serving a 3 year term that expires in December 2027. He completed his fellowship at Washington University in St. Louis and is board certified in Nephrology. He is passionate about teaching and is currently an assistant professor of medicine at Western University.

Basim Abdelkarim, M.D.

Basim Abdelkarim, M.D., is an ex officio member of the Board of Trustees, serving a three year term that expires in December 2026. Dr. Abdelkarim is a Board Certified Gastroenterologist and was appointed to the Medical Staff of San Antonio in 2010. Dr. Abdelkarim earned his degree at University of California, Irvine and is a Southern California native. He has also served as Chief of Staff at Kindred Rancho and Director of Gastroenterology at Casa Colina Hospital.

Timothy Wu, M.D.

Al Arguello

Mr. Arguello has served on the Board of Trustees since January 2019. He is a 50-year veteran with Bank of America and currently serves as Sr. Vice President and Inland Empire Market President for San Bernardino and Riverside counties. Mr. Arguello has served on the boards of numerous nonprofit organizations and he is presently a board member of the Greater Riverside Chamber of Commerce, Rancho Cucamonga Community and Arts Foundation, Inland Empire Economic Partnership, and Monday Morning Group of Riverside. He is also on the Dean’s Advisory Board of the UCR School of Business Administration, a member of the Steering Committee of the Micro Enterprise Collaborative of Inland Southern California and a past board member of the San Antonio Hospital Foundation.

Devorah Lieberman

Devorah Lieberman has served on the Board of Trustees since July of 2024. Devorah Lieberman continues to contribute to higher education and the region through Lieberman & Associates. Her clients include: Phoenix Philanthropy, The International Association of University Presidents, The American Council on Education, and several executive coaching clients.

Steven Barag, D.O.

A Board Certified Family Physician and Master Preceptor in Medical Education. Dr. Barag has been In active private practice for 48 years with no plan on retiring. Residing in Rancho Cucamonga for the past 30 years, all of his children were born at SARH and his right hip was replaced here. His goal is to serve SARH, the community of physicians, our patients and influence the future of healthcare through Graduate Medical Education.

Andrea Dutton

Andrea Dutton has been the recipient of the Hispanic Educator and the Latina of Distinction Awards. She is a published author for 5 editions of the textbook "Medical Techniques & Patient Care in Imaging Technology". She was a presenter at the Association of 'Collegiate Educators in Technology Conferences. Ms. Dutton was Women of the year for the 31st Senate District, a Phi Kappa Phi Honor Society Life member, and a recipient of the Chaffey College Presidents Excellence Awards. To continue the legacy of giving back to the community, two endowments--The Dutton Family Scholarships for Radiologic Technology Students and the Hispanic Students were established 5 years ago.

Jennifer Oglesby

Jennifer Oglesby has served on the San Antonio Regional Hospital Board since January 2025, bringing her extensive experience in mental and behavioral health care. She is the Founder of Rising Hill Developmental Homes, which operates facilities across California, providing 24-hour care and housing for adults with developmental disabilities. Jennifer is also an active member of various community organizations, where she leverages her expertise to develop innovative care strategies, expand mental health services, and strengthen community health initiatives to better serve diverse populations.