Our Team

Shawn 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.

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.