Board of Directors

Our Board of Directors represent our community population. They guide much of our decision-making, and therefore is comprised of a mix of patients and residents from UHC-Served communities who reflect local demographics.


Jack Shantz, Psy. D.

Board Chair

Daniel Parra



Sarah Guerra


Angel Angulo

Board Member

Esther Nicacio

Board Member


Nathan Williams

Board Member


Lorane Avalos

Board Member


Ofelia Garcia

Board Member

Jose Gutierrez, Board Member

Jose Gutierrez

Board Member

Nicole Thompson

Board Member

Executive Leadership Team

Colleen Curtis

President & Chief Executive Officer

Justin Preas

Deputy Chief Executive Officer

Ganga Hematillake, M.D.

Chief Medical Officer

David Phillips

Community Development Officer

Beatrice Perez

Clinical Services Officer

Miguel Rodriguez

Chief Operations Officer

Ricardo Viveros

Business Development Officer

Jesus Maldonado

Chief Financial Officer

Raul Venegas

Chief Information Officer

Senior Leadership Team

Gregory Williams, M.D.

Associate Medical Director

Sonia Relingo, D.D.S.

Associate Dental Director

Nathan Boyd, D.D.S.

Associate Dental Director

Choua Xiong-Fajardo

Director of Finance

Hyman Tageldin

Director of Information Technology

Sylvia Ramirez, Psy.D.

Director of Behavioral Health

Eliane Saed, R.N.

Director of Clinical Services

Stephanie Phyo, O.D.

Director of Optometry Services

Jonathon Anderson

Director of Health Information Technology

Michael Green

Director of Human Resources

Sara Santillan

Director of Quality Improvement

George Chatyrka

Director of HRSA Compliance/Grant Management

Mary Lou Lopez

Director of Central Operations

Kevin Love

Director of Facilities

Danette Owens

Director of Operations

Blake Carpenter

Director of Operations

Ali Atabbi

Director of Operations

Navjot Singh

Director of Billing and Managed Care