Simi Valley Hospital announced the retirement of CEO Darwin Remboldt, effective immediately.

Caroline Esparza, senior vice president for patient care at the hospital, will lead day-to-day operations while an executive search is underway for Remboldt's successor, said Bill Wing, senior vice president of Adventist Health, which operates the hospital.

Remboldt has led the team at Simi Valley Hospital twice, first from 1984 to 1989 and again since 2008. Remboldt has overseen the completion of a new patient tower, the renovations of the medical campus, and the implementation of advanced technologies to improve care services.

Previously, he was vice president of Clinic Services for Adventist Health as well as president and CEO of Adventist Medical Center - Hanford and Central Valley General Hospital in Central California.

Since beginning as a student worker in 1962, Remboldt has served in a variety of roles at other Adventist Health facilities: Adventist Medical Center - Portland, Glendale Adventist Medical Center and Sonora Regional Medical Center. He also has held numerous leadership positions in health care administration and physician multi-specialty groups.

Judy Temes