About Us

Zach_BirdDr. Zachary Bird is the Founding Consultant of Principled Behavior Consultants. He’s a Doctoral-level Board Certified Behavior Analyst (BCBA-D) licensed in Virginia, Maryland, and Massachusetts. He has more than 12 years of experience working with a variety of populations including individuals with developmental disabilities and conduct disorders. His expertise is in the assessment and treatment of severe disruptive behavior across a variety of settings. Additionally, he provides consultation with schools on classroom management and systematic instruction. He earned his PhD in Behavior Analysis at Simmons College and his Master’s degree in Applied Behavior Analysis from Western New England University. You can listen to him as a co-host of the ABA focused Functional Relations Podcast.

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Angie Bird is a Senior Behavior Consultant at Principled Behavior Consultants. She is a BCBA who earned her master’s degree at Western New England University.  She is licensed as a behavior analyst in Virginia and has over 15 years of experience working with clients with special needs. She is primarily interested in teaching social skills and training parents but has a wide range of experience working with schools, in-home services, and center-based services.  She finds joy in teaching others about ABA and helping to make a difference in the lives of clients and their families.

Sierra Essary is the Office Administrator at Principled Behavior Consultants. She is studying Human Resource Development and Business Administration at the University of Texas at Tyler. She will graduate in May of 2021. Overall, Sierra loves to use her administrative, secretarial, and human resources experience to help the team to operate at its best and most efficient in order to serve our clients.

Feel free to reach out if you are interested in hearing more about services offered by Principled Behavior Consultants.