Dr. NaStassia Greer

Dr. NaStassia Greer

Dr. Greer completed her internship and post-doctoral training at The Center for Psychological Services in Arlington, Texas where she received specialized training in assessment of Autism Spectrum Disorder, ADHD, mood disorders, behavioral disorders, and complex clinical presentations. Following her post-doctoral training, Dr. Greer served as a staff psychologist providing assessment and psychotherapy to individuals receiving care in rehabilitation and nursing home facilities. Dr. Greer has extensive experience working as part of interdisciplinary treatment teams and providing assessment for individuals with multifaceted problems including neurodevelopmental disorders, behavioral disorders, depression, anxiety, and interpersonal difficulties.

​Dr. Greer utilizes a comprehensive, integrative treatment approach targeting overall wellness and emphasizes the importance of the therapeutic relationship in the healing process. Dr. Greer believes in closely collaborating with clients to develop a tailored treatment plan to meet their needs and goals. While Dr. Greer’s psychotherapy practice focuses primarily on adolescents and adults, her assessment practice is open to children, adolescents, and adults.


  • Texas Licensed Psychologist, #37352

Professional Affiliations

  • American Psychological Association

Valerie Alvarez, LMSW

Clinical Supervisor: Brandi Jean Felderhoff, PhD, LCSW-S

Valerie Alvarez, LMSW, is a Licensed Master Social Worker who completed her degree from the University of Texas at Arlington in 2015. She currently attends The Tulane University and will graduate with her Doctor of Social Work degree in December of 2021. Valerie completed internships at The Child Study Center in Fort Worth and ABC Behavioral Health in Dallas.

Valerie has experience working with children diagnosed with behavioral issues and developmental disabilities, adults with co-occurring mental health and substance abuse disorders, homeless populations, rapid re-housing programs, persons living with HIV/AIDS, emergency shelter for children and youth, and most recently, providing emergency rental assistance for residents of Tarrant County adversely impacted by COVID-19. Valerie’s therapeutic approach is solution-focused, goal oriented, and holistic in nature.

Valerie is pursuing her LCSW (Licensed Clinical Social Worker) and is being supervised by Brandi Jean Felderhoff, PhD, LCSW-S. Dr. Felderhoff is the Vice President of the National Association of Social Workers-Texas Division and Assistant Professor at Texas Women’s University.

Kelli Lahman, BS, Psychology Assistant

Priscilla Medina, Administrative Assistant