DHS is led by a talented and experienced executive team that is committed to sustaining a high performing health care system that is responsive to the needs of County residents.

DHS Organizational Chart


Christina R. Ghaly, MD


Christina R. Ghaly, M.D.


Hal F. Yee, Jr, MD, PhD


Hal F. Yee, Jr., M.D., Ph.D.
Chief Medical Officer


Sue Currin, RN


Sue Currin, R.N.
Chief Nursing Officer


Nina Park


Nina J. Park, M.D.
Director, Population Health Management

Elizabeth Jacobi


Elizabeth Jacobi
Chief People Officer


Phillip Franks


Phillip Franks
Director, System Operations and Support Services


NA Male
Allan Wecker
Chief Financial Officer

Michael Owens


Michael Owens, M.D.
Director, Enterprise Data & Information Management


James W. Brady, PhD
James W. Brady, Ph.D.
Chief Information Officer

Shari Doi


Shari Doi
Director, Office of Patient Access


Cathy Chidester, RN


Cathy Chidester, R.N.
Director, Emergency Medical Services


Quentin O’Brien


Quentin O'Brien
Acting CEO, Ambulatory Care Network


Kimberly McKenzie, RN


Kimberly McKenzie, R.N.
CEO, Harbor-UCLA Medical Center


Jorge Orozco


Jorge Orozco
CEO, LAC+USC Medical Center


Judith Maass, MSN


Judith Maass, M.S.N.
CEO, Olive View-UCLA Medical Center


Aries Limbaga


Aries Limbaga, D.N.P., M.B.A.
CEO, Rancho Los Amigos National Rehabilitation Center