Leadership Team

Michael L. Christensen, MBA
Superintendent of Schools
superintendent@orangeusd.org

Ernest Gonzalez
Deputy Superintendent
ernest.gonzalez@orangeusd.org

Assistant Superintendents

Matthew Witmer, Ed.D.

Assistant Superintendent
Educational Services
mwitmer@orangeusd.org

Sulema Holguin

Assistant Superintendent/CBO
Business Services
sholguin@orangeusd.org

Tracy Knibb

Assistant Superintendent
Human Resources
tknibb@orangeusd.org

Craig Abercrombie

Executive Director
Secondary Education
jabercrombie@orangeusd.org

Heriberto Angel

Executive Director
Student & Community Services
hangel@orangeusd.org

Kevin Astor, Ed.D.

Executive Director
Human Resources
kastor@orangeusd.org

Meghna Bulsara

Executive Director
Business Services
mbulsara@orangeusd.org

Elena Rodriguez

Executive Director
Accountability, Equity & Engagement
Elementary Support
erodriguez@orangeusd.org

Lisa Green

Executive Director
TK-12 Curriculum & Instruction
lgreen@orangeusd.org

Sue Singh, Ed.D.

Chief Executive Officer
Special Education, SELPA
ssingh@orangeusd.org

Christina Lin, Ed.D.

Executive Director
Technology, Student Achievement Elementary Support
shaol@orangeusd.org

Kenneth Miller, Ed.D.

Administrative Director
Educational Services
kenneth.miller@orangeusd.org

Christina Celeste-Russo

Director
Transportation
cceleste@orangeusd.org

Sharon Davis

Director
Payroll
sharon.davis@orangeusd.org

Diana Gaeta

Director
Risk Management
dgaeta@orangeusd.org

Steve Harlin

Director
Maintenance & Operations
sharlin@orangeusd.org

Neil Groom

Director
Contracts & Purchasing
ngroom@orangeusd.org

Arlene Magana

Director
Fiscal Services
arlene.magana@orangeusd.org

Tam Nguyen

Chief Technology Officer
Information Technology
tam.nguyen@orangeusd.org

Jamie Sanchez

Director
Nutrition Services
jamie.sanchez@orangeusd.org

Susanna Solis

Director
Human Resources
ssolis@orangeusd.org