Clinical Team

Steven Barnett, LPC

Middle School Counselor

Steven is a Licensed Professional Counselor who has provided both individual and group therapy for a diverse clientele in a variety of settings. He earned a Master’s degree in counseling from Southern Methodist University with a dual focus on individual and family therapy. He also has a Bachelor’s degree in philosophy from the University of North Texas. Steven believes strongly in the maxim, “be the person you needed as a kid” and he enjoys working with adolescents. Steven is a husband, father to a young son, and a lifelong musician. He enjoys spicy food, goofy humor, and old movies.

Julie Dyer, LPC, C-DBT

High School Counselor

Julie Dyer is a Licensed Professional Counselor and has been with Vanguard since 2007. She has worked with children and teens in a therapeutic setting since 2003. Julie is most interested in helping children feel successful in their environment and also to learn more about themselves and how to collaborate with others. Julie graduated with a Master’s degree in Clinical Psychology from Radford University in Virginia.

Kevin Goodnight, BCBA

Director, Family Services and Training

Kevin Goodnight has been working with children with developmental disabilities or autism since 2000. He has a Bachelor’s degree in Human Development and Family Studies from Texas Tech University and a Master’s degree in Psychology, specializing in Applied Behavior Analysis. Kevin is a husband and father and he loves to travel and play golf in his free time. His focus is helping children find a path where they can thrive and flourish.

Jason Mishalanie, Ph.D

Psychological Testing, Neurofeedback and Clinical Program Advisor

Jason F. Mishalanie, Ph.D. is a Licensed Psychologist and a Clinical Advisor for Vanguard Preparatory School. Dr. Mishalanie is also the Clinical Director of Neurotherapies with the Vanguard Center for Neurological Health. He is BCIA board certified in neurofeedback and has over 18 years of experience in the field. Dr. Mishalanie is trained in the assessment, diagnosis, and psychological treatment of children, adolescents, and adults. He has over 24 years of experience in the mental health field and has worked with diverse populations to include people with chronic mental illness, developmental disorders, and traumatic brain injury. Dr. Mishalanie is also trained in individual and family therapy, behavioral and cognitive-behavioral treatment modalities, neuropsychological assessment, Quantitative Electroencephalogram (QEEG), Electroencephalogram (EEG) Neurofeedback, neurostimulation, and Low Energy Neurofeedback System (LENS). Dr. Mishalanie has also served as a Forensic evaluator for the Dallas County courts to include child custody and competency evaluations.

Dr. Mishalanie graduated with his Ph.D. in Physiological Psychology from Texas Christian University, and holds two Master’s degrees in Clinical and Experimental Psychology. During his doctoral training, Dr. Mishalanie was trained in the area of recovery of function following brain injury while at TCU, as well as EEG evoked potential recording and analysis at the University of Texas, Medical Branch in Galveston. After serving for 10 years as the Chief Psychologist of the Developmental Disabilities division at Metrocare Services in Dallas, Dr. Mishalanie founded Peak Neuroscience, LLC in order to provide neurotherapy and psychotherapy to children and adults with a wide array of difficulties including autism, ADHD, depression, anxiety, brain injury, attachment, and speech disorders.

Mari Ordonez, MS

Lower School Counselor

Mari joined the Vanguard team in 2019. She graduated with one Bachelor’s degree in Child Development and another in Psychology from the University of Texas at Dallas. She also has a Master’s Degree in Counseling with child and adolescent specialization from Southern Methodist University. 

Janette Warne, SLP-CCC

Clinical Coordinator

Janette Warne has a Master’s degree in speech-language pathology and over 20 years of experience treating communication disorders in medical, educational, and university settings. Her primary areas of interest are diagnostics, phonology/highly unintelligible speech, and language-literacy. Janette is also a Vanguard mom and she is committed to helping families discover the difference Vanguard can make for their children.

Vanguard Preparatory School

4240 Sigma Road Dallas, TX 75244 | phone: 972.404.1616 | fax: 972.404.1641 | email:

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