Staff & Bios

One of our greatest assets is the outstanding staff; all highly trained, caring, dedicated, and experienced professionals.

David Gregory School staff includes:

  • PhD level behavioral consultant
  • Two Masters level Board Certified Behavior Analysts (BCBAs)
  • Certified School Speech Pathologist
  • Oral Motor Prompt Therapy Certified Speech Consultant
  • Occupational Therapy Consultant
  • Full-time Certified School Nurse
  • Registered yoga teacher

Having worked at the school for many years, our staff has demonstrated their commitment, talent, and sensitivity to children with special needs.


Marie Lupinski, MA | Founder

Marie Lupinski, is a life-long educator with more than thirty years of experience in the field of special education. She holds dual teaching certifications in both early childhood and special education and has a Masters Degree in Educational Administration. In addition to her teaching certifications Marie is also certified as a supervisor and principal.

Gladys Williams, PhD | Behavioral Consultant

Dr. Gladys Williams is a specialist in curriculum design and verbal behavior with a doctoral degree in Applied Behavior Analysis from Columbia University. She is the author of journal articles and chapters on teaching social and language skills to children with autism and other learning disabilities. She has also written on school effectiveness, eating disorders, and parent training and presented at both national and international conferences.

Recognized internationally, Dr. Williams has received many awards for her contribution to the field of special education and created effective programs for children with autism and learning disabilities in the US, Spain, Argentina, Mexico, and Brazil. She is currently on the board of several behavior analysis journals and is an active member of the Association of Behavior Analysis International.

Dr. Williams has been with David Gregory School since 1995 and is also the director of Applied Behavioral Consultant Services.

Sara Garbarini | BCBA

Sara received her Masters degree in Special Education and a certificate in Applied Behavior Analysis from George Mason University in Fairfax, Virginia. She received her BCBA (Board Certified Behavior Analysist) certification in January 2013. She has worked with students with developmental disabilities for 7 years in both private and public schools in Maryland, District of Columbia, and New Jersey. She joined the David Gregory School team in 2015. 

David Ruzich, MA | Principal

David Ruzich has a Masters Degree in special education from New Jersey City University, a K-12 Principal's Certification, and a pending Masters Degree in educational leadership also from NJCU. After a successful career in the business world, David returned to his true calling of working with special needs children. To that end, he worked as a long term special education substitute teacher in Fort Lee public school system before joining the David Gregory School team in 1994.

Heather Carew, MSW, LCSW, BCBA | Consultant

Heather Carew has been a Social Worker at David Gregory School since 1996. She graduated with a Master’s Degree in Social Work from Fordham University and took post Master’s classes in Applied Behavior Analysis at Rutgers University, obtaining a BCBA in 2009. Heather has been involved in research studies at David Gregory School and presented at the Autism New Jersey Annual Conference (formerly COSAC) with her co-workers.