Meet the Team

Our Board of Directors, Leadership Team, Clinicians, and Partners make up the team of dedicated professionals and organizations who help us provide comprehensive healthcare services for our community.

  • Board of Directors
  • Leadership team
  • Our partners
Mr. Trey Mathis
Mrs. Yesenia Banda
Ms. Maria Saavedra
Mr. William Pfaff
Ms. Sheryln Samuel Chibuzor
Dr. Barbara Baxter
Ms. Vickie Cano
Mrs. Sofia Garcia
Mrs. Margaret Hinguanzo-Daugherty
The Honorable Steve Salazar
Dr. Katherine Sanchez
Mr. Larry Taylor
Mrs. Magdelena Wolters-Williams
Mr. Nicholas Renna


President Elect

Past President



In Memoriam of Nicholas Renna

Leonor Marquez
Claudia Aroni
Joleen Bagwell
Dr. Sharon Davis
Art Garza
Alfredo Gonzalez
Liz Lindsey, DNP, APRN, FNP-C
Dr. Christopher Choat
Tammy Gonzalez
LaCal Bates
Nora Johnson
Sylvia Melton
Carolyn Operacz
Charea Borner
Marvin Lopez
Mary Pina
Ana Rangel
Cesar Varon
Kimberly Wicks

Chief Executive Officer

With more than 30 years in community health care,  Leonor Marquez holds a Bachelor of Social Work degree from Arizona State University, a Master of Social Work degree from Our Lady of the Lake University, and a Master of Business Administration degree from the University of Texas at San Antonio, along with holding a current Texas license as a Clinical Social Worker.

Leonor joined LBU Community Clinic in 2005 and leads a team of 260 employees with a budget of $25 million. The health center serves 30,000 customers through 90,000 doctor/patient visits, most of whom are low income and uninsured. She has also worked as an administrator at Parkland Health where she ran the Health Care for the Homeless Program and the School Based Clinics, along with many years in San Antonio as a Director at CentroMed, a large community health center.

Chief Technology Officer

Claudia Aroni holds a certificate in bilingual education from Dallas County Community College, now Dallas College, along with dual Master in Business Administration and Master in Health System Management degrees from Texas Woman’s University in Denton. While working at LBU Community Clinic, she trained at Parkland Hospital and earned an AAS in Health Information Technology from DeVry University. To obtain her Bachelor of Science in Health Information Management from Texas State University in San Marcos, she trained at Baylor Hospital in Grapevine.

In addition to her professional work experience, she teaches English as second language and US civics through Catholic Charities of Dallas Refugee Empowerment Services. For self-care, she volunteers at Austin Street Center, the largest low barrier homeless shelter in Dallas, and enjoys running, indoor cycling, reading sci-fi novels, drinking coffee, going to the Opera, and listening to live music.

Chief Development Officer

Joleen Bagwell holds a Bachelor of Arts from the University of Maryland.

She has been a nonprofit professional for 40 years and is a Certified Fundraising Executive, focusing largely on fundraising, marketing, and building organizational effectiveness.

Joleen launched the organization’s first brand refresh and advertising initiative.  From Los Barrios Unidos Community Clinic to the more contemporary LBU Community Clinic, the new name and logo evoke a modernized, top-notch medical system which is welcoming to all communities.

Chief Medical Officer

Dr. Sharon Davis is  a board-certified family practitioner who has been in practice 27 years. She did her medical training in Texas at the University of North Texas Health Science Center and completed her family practice residency program in Dallas at the University of Texas Southwestern Medical School’s program located in Methodist Medical Center.

Dr. Davis has a passion for providing medical care to the underserved. She has volunteered in multiple local medical outreach events. 

Chief Financial Officer

Art Garza  has been an accounting professional for over 25 years. He is a licensed CPA, having graduated Cum Laude from Woodbury University in Burbank, California, with a Bachelor of Science degree in accounting.  He served in the United States Marine Corps during the Gulf War – Desert Storm and Desert Shield.

Art enjoys mentoring the next generation of accountants and has helped train and guide several in obtaining their licenses. 

Chief Human Resources Officer

Alfredo Gonzalez  holds a Master of Science in Human Resources Management degree and a Bachelor of Arts in Psychology degree from Argosy University Dallas. He has served honorably in the United States Marine Corps for 8 years where he was recognized with various awards for superior performance and good conduct.

After his military service, Alfredo has held various finance and human resources with experience in multiple facets of human resources to include payroll, employee relations, talent acquisition, employee benefits, compensation, training and development, workers’ compensation, labor relations, and employment law.

Alfredo is devoted to his family and his faith. Alfredo has served for several years in different ministries of his church congregation in the capacities of Sunday school teacher, bible study leader, Director of Marriage Ministries. In his spare time Alfredo enjoys stock trading and keeping up with politics.

Chief Operating Officer

Dr. Liz Lindsey has held a board certification as a Family Nurse Practitioner by the American Academy of Nurse Practitioners and has held it for 11 years.

Dr. Lindsey attended El Centro College and graduated in 2006 with her associate degree in nursing. She then continued her education and received her Bachelor of Science in Nursing degree in 2009, her Master of Science in Nursing degree in 2012, and her Doctorate in Nursing Practice degree in 2018, all of which she received from Texas Woman’s University.

Dr. Lindsey’s passion is to work with underserved communities, which she has done for almost 8 years. She has served as Clinic Manager and Chief Medical Officer, which allowed her direct oversight of operations and the quality of care delivered to patients. She has also served as an adjunct professor teaching clinicals at the Louise Herrington Baylor School of Nursing.  Dr. Lindsey authored Evaluation of a Palpable Breast Mass in a Young Female: Implications When Working with Underserved Populations, published in the Journal of Women’s Health, Issues, and Care, Volume 7, Issue 3.  When she is not helping others, you can find Dr. Lindsey spending time with her husband and family, at her church and traveling. 

Compliance Officer / Optometrist

Dr. Christopher Choat is an optometrist who has been in practice since 2002. He holds a Doctor of Optometry degree from Nova Southeastern University in Fort Lauderdale, Florida, and joined LBU in August of 2015 as staff optometrist and Compliance Officer. 

Prior to joining LBU, Dr. Choat served as Assistant Professor of Optometry and Chief Compliance Officer at the University of the Incarnate Word School of Optometry in San Antonio, Texas where he taught courses on medical law, vision rehabilitation, neuroanatomy, and ocular motility.  He also spent 10 years in private practice focused on low vision rehabilitation.

Executive Assistant

Director, Business Development

LaCal Bates is currently the Director of Business Development at LBU Community Clinic.

Director, Quality & Safety

With over 25 years of expertise in the field, Nora Johnson is currently the Director of Quality and Safety at LBU Community Clinic where she is responsible for the planning, direction, and coordination of quality improvement and assurance of the organization, as well as employee and patient safety to improve clinical outcomes, enhance value, and minimize patient and employee harm.

Outside of work, Nora enjoys listening to music, cooking, swimming, traveling, and spending time with family.

Director, Marketing

With over 20 years of expertise in the field, Sylvia Melton is currently the Marketing Director at LBU Community Clinic where she executes effective marketing strategies that drive business growth.

Outside of work, Sylvia enjoys writing children’s books and is an avid crafter. She enjoys exploring new places, trying new foods, and going to festivals.

Director, WIC

With over 13 years of expertise in the field, Carolyn Operacz is currently the WIC Director at LBU Community Clinic where she manages The Special Supplemental Nutrition Program for Women, Infants and Children.

Outside of work, Carolyn enjoys reading, baking sourdough bread, and working in her vegetable garden.

Clinic Manager, Adult Medicine

With over 13 years of expertise in the field, Charea’ Borner is currently the Clinic Manager at LBU Oak Cliff Community Clinic where she shows leadership, effective communication, and help with problem solving.

Outside of work, Charea’ loves to go shopping, try different foods, and being around my family.

Clinic Manager, Pediatrics and Call Center

Marvin Lopez is currently the Manager for LBU Pediatrics and the Call Center at LBU Community Clinic.

Manager, Access

Mary Pina is currently the Access Manager at LBU Community Clinic.

Manager, Eligibility

With over 15 years of expertise in the field, Ana Rangel is currently the Eligibility manager at LBU Community Clinic. Ana’s focal point is to help patients and the community with state programs which originate at the federal, state and local levels.

Outside of work, Ana enjoys listening to music, watching movies, trying new foods, and going to festivals.

Clinic Manager, West Dallas

With over 12 years of expertise in healthcare, Cesar Varon is currently the Clinic Manager of the West Dallas Campus at LBU Community Clinic.

Clinic Manager, LBU South Oak Cliff

Kimberly Wicks is the Clinic manager for LBU South Oak Cliff and The TD Marshall Youth & Family Center.

LBU Community Clinic’s decades of success can be attributed to working collaboratively.

LBU has close ties with a number of excellent local organizations providing a myriad of critical services for our patients including: