Who We Are


Dr. Davenport recognized many charter schools were not SPED knowledgeable nor did they have the funds or talent to provide SPED services. Diagnostic Assessment Services, DAS was born.

DAS remains a woman-owned business. Dr. Davenport continues to serve as CEO and Founder. Our leadership team consists of highly educated professionals. They understand SPED law, best practices, and their specialization is all woven together with a heart to serve.


Meet Our Team

Brandy Taylor-Dede

Brandy Taylor-DeDe

Licensed Specialist in School Psychology

Director of Business Operations

As Director of Business Operations, Dr. Dede is responsible for establishing contracts with the clients and overseeing Accounts Receivable. She works closely with the Business Office and Campus Coordinators to ensure a seamless process between service delivery, invoicing, and payment.    

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Tamala Close

Tamala Hutchinson Close

Speech-Language Pathologist

Director Clinical Services

As the Director of Clinical Services, Tamala Close is responsible for facilitating exemplary therapeutic services, assessments, consultations, ARDs, and interventions. She diligently collaborates with campus staff to meet each student’s unique need for these outlined services.

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We Stand Committed To








Diagnostic Assessment Services

4100 Alpha Road

Suite 1150

Dallas, TX 75244