Joshua Rosenthal, PsyD – Director & Owner

Dr. Rosenthal is a NY & NJ licensed clinical psychologist who specializes in the treatment of children, young adults and families. He maintains three offices on the UES and UWS in Manhattan where he serves as the resident psychologist for a multi-physician pediatric group and provides individual cognitive-behavioral therapy, Parent Child Interaction Therapy (PCIT), parent training, family therapy, and social skills training. Dr. Rosenthal has given grand rounds on Asperger’s Syndrome at Woodhull Medical Center and Lenox Hill Hospital, and written on the behavioral treatment of ADHD. He also created the Electronic Daily Report Card ( to improve social and academic behaviors at school. To learn more, please visit


Anna Christodoulou, PsyD – Assistant Director (9-12 Group)

Dr. Christodoulou is a New York State licensed school psychologist and currently the School Psychologist for a private school in Manhattan. She has worked as a school psychologist in a variety of school settings (London, Athens and New York) with children of all ages and diverse backgrounds, as well as parents, teachers, and other professionals. Dr. Christodoulou has training and experience with solution-focused brief therapy (SFBT) and Cognitive Behavioral Therapy (CBT).


Anna Oliva, M.S.Ed. – Assistant Director (7-8 Group)

Anna is a New York State Certified Bilingual School Psychologist and Nationally Certified School Psychologist. She received her Bachelors degree in Psychology from Syracuse University and her Masters Degree and Advanced Certificate from Fordham University. She currently works as a school psychologist for New York City public schools. She has experience with students from pre-kindergarten to high school. Anna holds a bilingual extension in Spanish and specializes in working with culturally and linguistically diverse populations.


Carly Kisberg, LMSW – Assistant Director (5-6 Group)

Carly Kisberg is a licensed social worker and behavioral therapist with expertise in applied behavior analysis (ABA). She provides school consultation and eDRC management, behavior therapy, ABA, executive function training, and social skills training for children with ASD, speech and language disorders, ADHD and anxiety. Carly earned her Bachelor of Science in Communication Disorders at the University of Massachusetts at Amherst, Master of Social Work at Hunter College, and Advanced Certificate in Applied Behavior Analysis at Hunter College School of Education.


Erika Stapert, PsyD – Assistant Director (4’s Group)

Dr. Stapert is a New York State licensed psychologist who received her B.A. in Psychology from the University of Michigan and went on to earn her doctoral degree in Clinical Psychology from the The Chicago School. Dr. Stapert specializes in the treatment of young children with emotional and behavioral disorders, is trained in Parent-Child Interaction Therapy (PCIT), has extensive experience leading and supervising early childhood socialization groups and has also provided individual, family and group therapy in a variety of settings including Head Start programming, a therapeutic nursery, and other outpatient clinic settings.

Program Staff

Our team of special education teachers, master’s level professionals, graduate students and college counselors have specialized training in ADHD, Autism Spectrum Disorders, Learning Disabilities, and Behavior Management. Counselors participate in a weekly long intensive training just prior to camp.

We're Hiring for 2016!


Teachers, Counselors, Chaperons, Nurses and Alternate Counselors

*View All Job Descriptions, 4's Teacher and then complete our ONLINE APPLICATION

*You will need to submit your CV/Resume and two letters of recommendation

*You will need to provide medical clearance from a physician before starting work.

*No calls please

*All job inquiries - Jobs (at) bigappledayprogram (dot) com