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Our Story

Working Towards a Better Tomorrow

Bethea-Miller Behavioral Consulting, LLC was founded in 2016 by Vanessa Bethea-Miller, M.A., BCBA, LBS. We utilize the principles of Applied Behavior Analysis to provide socially significant services to our community. We also use these principles to decrease socially inappropriate behaviors while increasing more socially appropriate behaviors for children and adults with Autism or Intellectual Disabilities as well as those who are dually diagnosed with a mental illness. We focus on teaching socially appropriate behaviors, training families and staff, social skills, activities of daily living, the acquisition of functional communication, and much more.


Our Team

Who We Are


Vanessa Bethea-Miller, M.A., BCBA, LBS

CEO and Founder

Vanessa Bethea-Miller is a Board Certified Behavior Analyst and PA Licensed Behavior Specialist. Vanessa is the founder of Bethea-Miller Behavioral Consulting and Shaping Tomorrow Child Care Services, an ABA based daycare and preschool, and the co-founder of the ABA Task Force. She is also the author of “I Know What I Want to Be”, a sweet children's book about a young girl exploring different careers in science before deciding she wants to be a Behavior Analyst. Vanessa is pursuing her doctorate of philosophy in Applied Behavior Analysis (ABA) and currently holds a Master of Arts in Applied Psychology with a concentration in ABA, a Bachelor of Arts in Criminal Justice, and an Associate's degree in Business Administration.

Vanessa has dedicated her time to working with children and adults with Autism and/or Developmental Disabilities, with or without a co-occurring mental illness. She is passionate about providing quality and effective ABA services to this population as well as children in need of behavior supports. In addition to this, Vanessa provides coaching and mentoring to other individuals starting their own ABA practices. Vanessa also teaches courses in behavior analysis at the college level. She has presented internationally on various topics such as the application of ABA to the juvenile justice population, implicit racial bias, etc. Lastly, Vanessa has utilized components of school-wide positive behavior support with an emphasis on behavior analysis and applied them to a juvenile detention center during a practicum experience. 

When Vanessa is not working, she spends her time raising and educating her 3 daughters and son. She enjoys traveling and experience the world. Vanessa also volunteers as a District Equity Leadership Team Member for her local school district and is a Representative at Large for NJABA.

Christopher J. Tallmadge, M.A., BCBA

Part-Time Behavior Analyst

Christopher Tallmadge is the Clinical Director of Bethea-Miller Behavioral Consulting and joined the team in September 2020. He attended The College of New Jersey where he received a Bachelor of Arts Degree in Psychology and obtained his Master of Arts Degree in Psychology at Kean University. He also received his Certificate in Applied Behavior Analysis from Ball State University and has been a Board Certified Behavior Analyst since February 2018. He has worked in school, in-home, and adult service programs for over ten years, specializing in serving clients with severe maladaptive behaviors and impaired communication skills. He also has experience in crisis management, abuse/neglect investigations, and social skill development. Previous to his new role, he has most recently worked as a contractor to provide ABA services to families in the U.S. military. 


Christopher lives in Florence Township with his wife and their 18-month-old daughter. He enjoys film, music, playing guitar, swimming, and spending time with his extended families. He is also an ordained wedding officiant and has married several of his best friends and family members. 


Kristen Csizmadia, M.A., LBS

Operations Manager

Kristen Csizmadia rejoined our team in March 2023. She worked on our team previously, as one of our Behavior Specialist Consultants. She attended Rider University, obtaining her Bachelor’s Degree in Psychology and Masters of Arts Degree in Applied Psychology with a concentration in ABA. Kristen also has her PA Behavior Specialist license and an Associate's Degree in Education.


Kristen has worked with children and adults with Autism and/or Developmental Disabilities, with or without a co-occurring mental illness for the past 16 years. She has worked with these individuals in a variety of settings including private schools, public schools, residential homes, day programs, after school programs, camps, in-home services and daycare facilities. Kristen is passionate in providing effective social skill training, generalizing skills, parent/caregiver training, and decreasing maladaptive behaviors.


In Kristen’s free time she enjoys spending time with her two daughters. Her hobbies include researching her family genealogy, going to tea houses, traveling, and DIY projects with her husband.

Shantell Lewis, M.S., BCBA, LBS

Director of Community Relations

Shantell Lewis joined our team in May 2017. She attended Brooklyn College, obtaining her Bachelor's Degree in Speech Pathology, Audiology, and Communication Sciences. Shantell holds a Master of Science in Psychology with a concentration in  Applied Behavior Analysis from Purdue Global University. 

Shantell has dedicated her time to working with children with and without special needs. For about 3 years, Shantell has worked at our sister company as a Center Director. She has also worked at Bethea-Miller for over 5 years as a Registered Behavior Technician (RBT), Program Coordinator, and now a Behavior Analyst. Shantell comes to us with a wealth of knowledge related to Applied Behavior Analysis.

Shantell has a teenage daughter and a pre-teen son. Her hobbies include singing, dancing, and crafting. She enjoys blogging and creating social media content. 

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