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Cassie Cao, Ph.D, BCBA-D, LBA
Dr. Cao received her doctoral degree in Applied Behavior Analysis (ABA) from Columbia University. She has over six years of experience in working with typically developing children as well as children with autism spectrum disorder and other developmental disabilities. Dr. Cao has extensive experience in early intervention, educational assessment, designing and managing ABA programs, and applying behavioral principles to teaching, learning and behavior management. She supervises clinicians seeking certifications in ABA, and provides training for parents and professionals. ​

Dr. Cao also travels internationally to provide professional training and setting up university programs in China. She is the co-author of a training handbook for parents in China. She provides services and evaluations in English and Chinese Mandarin.

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Jennifer Lee Moschella, Ph.D., BCBA-D, LBA, CABAS(R) Associate Behavior Analyst
Dr. Lee is a board-certified behavior analyst with a background in elementary education. She received her doctorate in Applied Behavior Analysis from Columbia University and her Bachelor of Arts degree in Neuroscience and Special Education from Colgate University. She has taught in inclusion classrooms for five years and served as a graduate assistant adjunct professor at Teachers College, Columbia University. She has published peer-reviewed papers, consulted in public school districts, supervised clinicians, and designed many home and school ABA programs. Her passion is collaborating with parents and schools to create the best possible educational success for students.
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Waikhine Phu, BCBA, LBA

Waikhine Phu is a board certified behavior analyst with 10 years of experience in life skills instruction, supervision, training and staff development, and application of scientific research-based strategies to improve performance and learning behaviors of individuals with diverse abilities. She received her Masters in Applied Behavior Analysis from Columbia University, Teachers College and her Bachelor of Arts degree in Psychology from Massachusetts College of Liberal Arts. She has assessed, written, implemented, and overseen ABA interventions for neurodiverse individuals in various settings such as residential schools, outpatient clinics, public schools, as well as clients’ homes. She previously published a study on professional and ethical compliance for behavior analysts. Her main research interest in the field of behavior analysis lies in organizational behavior management, specifically in culturally sensitive coaching and training of direct care staff and family members.
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Lin Du, Ph.D., BCBA-D, LBA, CABAS® senior behavior analyst, associate research scientist

Dr. Lin Du receives her Ph.D. in Applied Behavior Analysis from Columbia University. She has over 15 years of experience in practicing ABA. Dr. Du is a clinical supervisor at Gotham Children. She also works as a program supervisor and research scientist at the Fred S. Keller School. She supervises instructional programs, provides training for teachers and therapists, mentors master and doctoral candidates in the ABA program, and provides parent education. Dr. Du is also an adjunct assistant professor of behavior analysis at Teachers College, Columbia University in New York. She travels internationally to provide ABA training to students and families in East Asia. 


Carli Heiman, PhD, BCBA-D, LBA


Dr. Heiman is a Board Certified Behavior Analyst and Licensed Behavior Analyst in New York State. She received her doctorate in ABA from Columbia University where she particularly focused on working with parents of children with ASD. She currently works as a special education teacher for a self-contained elementary school classroom for students grades 3-5. She has experience working with children with developmental delays ages 3-12 across all levels of verbal development and further has experience working in integrated elementary school classrooms. She has presented her research at local and international conferences and is in the process of publishing peer-reviewed articles related to Verbal Behavior interventions and parent-child interactions for families of children with developmental disabilities.


Jessica Yoon, Ph.D., BCBA-D, NYS-LBA

Dr. Yoon is a BCBA-D and NYS-LBA with over 10 years of experience working in the field of Applied Behavior Analysis. She received her doctorate and master of arts degree in Applied Behavior Analysis (ABA) from Columbia University and her Bachelor of Arts degree in Psychology from Binghamton University. She has worked in various settings such as public schools, private schools, ABA Centers, and clients' homes. She has extensive experience working with individuals with Autism Spectrum Disorder (ASD), speech and language disorders, as well as neurotypical individuals. She has supervised clinicians, conducted educational assessments, and designed many home and school ABA programs targeting academic, communication, social, and behavior management goals. Dr. Yoon also travels internationally to provide professional development training, ABA consultation, and classroom program development in South Korea.


Hung Chang, Ph.D, , BCBA-D

Dr. Hung Chang received his BS in special education from the National Taipei University of Education. He then earned his MA, M.Phil, and Ph.D. in applied behavior analysis (ABA) from Teachers College, Columbia University. He has worked in the education and ABA fields since 2010, and he currently provides direct service and supervision at Gotham Children. In addition to Gotham Children, Hung Chang is also a supervisor of the Early Intervention Program for a school located in the suburbs of New York City. He has earned several CABAS® ranks and currently holds an Assistant Behavior Analyst rank. 

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