Our Team

Heritage Oaks Hospital’s team of esteemed staff includes:

Shawn Silva, CEO
Shawn SilvaShawn Silva, who currently holds the position of Chief Executive Officer at Heritage Oaks Hospital, began his career in behavioral health care in 1992. He has held several positions throughout his career, including Divisional Director of Business Development, with oversight of nine locally/nationally based facilities, and Chief Operating Officer of a 166-bed behavioral health facility in southern California.

Shawn completed his Master’s in Business Administration, with an emphasis in health care administration, at Regis University in Denver.

Art Wong, CFO
Art Wong, born and raised in Toronto in Ontario, Canada, relocated to the Los Angeles area and began his career in health care operations shortly after. After obtaining an undergraduate B.A. degree from California State University of Los Angeles, Wong gained approximately 20 years of experience in management, hospital operations and financial leadership in eight psychiatric hospitals throughout California.

His experience has provided him with valuable skills such as strategic planning, budgeting, financial planning, overseeing operations of complex multi-specialty practices and making high-stakes decisions, among others. Prior to becoming CFO at Heritage Oaks, Wong served as the Chief Financial Officer at Fremont Hospital and as Finance & Operations Manager of Woodland Memorial Hospital and the Woodland Clinic.

Joseph Sison, M.D., Medical Director

Dr. Sison has served as the medical director for Heritage Oaks Hospital since 2006 and is an associate clinical professor in the Department of Psychiatry and Behavioral Sciences at UC Davis School of Medicine. He graduated from UCLA School of Medicine and completed his general psychiatry residency training at St. Elizabeth’s Hospital in Washington, D.C.

Dr. Sison is also a child psychiatrist and finished his child psychiatry training at the University of Maryland Medical Systems. He is a longtime active community member in Sacramento and had previously served as medical director for Sacramento County Child and Family Mental Health for 11 years. He has served on various boards of directors in Sacramento, including the Big Brothers, Big Sisters of Sacramento and the Head Trauma Support Project. He is a previous president of the Central California Psychiatric Society, a district branch of the American Psychiatric Association.

Although Dr. Sison specializes in the treatment of mood disorders in children and adolescents as well as being an expert in treating children with ADHD, his psychopharmacology expertise also serves him well in the treatment of various adult psychiatric illnesses, such as bipolar disorder, depression and schizophrenia.