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Aldecia Matthews, B.S, M. S.

Regional Director of Operations Aldecia Matthews is a seasoned healthcare professional with over 10 years of dedicated experience in the sector. She holds two Bachelor…

Elaine Williams, MA, LCPC

Clinic Director Elaine Williams, MA, LCPC serves as the clinic director of Columbia Associates’ Columbia office. Elaine is originally from Liberia and grew up in…

Pegah Barker, PA-C, CAQ-Psych

Senior Medical Resource Director Pegah Barker is an NCCPA board-certified Physician Assistant at the North Bethesda clinic. She earned her Bachelor of Science in Psychology…

Sandra N. Crespo, LICSW

Clinic Director Sandra N. Crespo is a licensed clinical social worker, professor, public speaker and advocate for diversity in social work leadership and wellness. As…

Lee Collins, Clinic Director, LCPC

I am the Clinic Director of our Silver Spring Clinic. I am passionate about collaborating with clients seeking genuine and lasting behavior change. Utilizing insight-oriented, action-based…

Lisa Mankin, MS, CPRP

Lisa Mankin serves as the DMV Market Leader who oversees all operational components in all the Maryland and Virginia clinics. At TCN and throughout her…

Alexis Evans, LPC

I am The Clinic Director at our Fairfax clinic who provides therapy services in-person and via telehealth. You may be struggling to keep up with…

David D. Riley, LCSW

David Riley, LCSW serves as the Clinical Director for Columbia Associates’ Arlington office. David is a compassionate and client-centered clinician. His passion for equity, social…

Frances Hayes

Frances Hayes is the clinic director of our Aldie office. She is an eight-year U.S. Army veteran and has over twenty years of experience in…