BCBA's
Board Certified Behavior Analyst: Provides ongoing supervision for your child's therapy including staff and parent training, analyzing treatment outcomes, and making data driven decisions. The BCBA is your "go-to" person for everything from clinical questions to sharing excitement over reaching a milestone.

Michael “Mike” Nazzaro
M. Ed., BCBA, LABA
For the past 7 years I have worked with children and adults with special needs. Over this time, I have worked for a private residential school for students with special needs, adult day and residential program, home service programs, and public schools. Over my time in the field I have developed a passion for parent/caregiver training and teaching functional living skills. Seeing a child or adult do something for the first time under a variety of conditions is the most rewarding thing to me. I enjoy building relationships and improving the lives of the children and families I work with.

Jennifer Decie-Scott
M.S., BCBA, LABA
I have been working with those who have ASD since 2014 and knew that I wanted to make a difference in children’s lives. After receiving my bachelor’s degree from Salem State In 2018, I began my career at the May Institute and went on to receive a Master’s in Behavior Analysis and became a BCBA. I have experience with individuals ages 5-22 teaching social, academic, daily living, communication, and vocational skills. Functional communication is my favorite domain to teach! I currently work full-time at a public school and I am further my experience within the home setting at B.E.S.T. Outside of ABA, I enjoy reading, watching Netflix, puzzles and biking and hiking during the warmer months with my husband.

George El-Khoury
M.A., BCBA, LABA,
I received a BA in psychology from the University of Michigan in 2018 and completed a MA in applied behavior analysis from William James College to become a BCBA. I love working in this field and being part of a team of people that strive to positively impact the lives of families and the communities we serve everyday. I am a New England native interested in traveling the world and disseminating the field of applied behavior analysis to remote and in-need communities. My professional interests outside of autism are sustainability and behavioral medicine. I also love taking care of plants and birdwatching.

Hannah Everson
M.Ed., BCBA, LABA
After receiving my bachelor’s degree from Worcester State in Communication Sciences and Disorders, I went to Cambridge College where I got my master’s in Applied Behavior Analysis concentrating in autism spectrum disorders. I’ve worked in public schools as a Speech and Language Assistant as well as private companies providing ABA services to clients ranging from pre-school to adults. Seeing clients gain independence is one of my favorite parts of teaching using behavior analysis. In my free time, I like to listen to true crime and dog training podcasts. I also love to play softball and stay active with my new puppy.

I have a Bachelor of Science in Psychology from
Evangel University and a Master of Science in Behavior Analysis from Simmons University. For the past 17 years I have worked with children and families as a social worker. It is my passion to work to improve outcomes, build positive working relationships, and find joy in everyday things. I especially enjoy Natural Environment Teaching and using the child’s interests to teach relevant skills. Outside of ABA, I love to read, crochet, and playing The Legend of Zelda. It is always a pleasure to meet new families and I look forward to working with you!
Nelvi Diaz
M.S., BCBA, LABA, LSW

Andrea Perkins
M.Ed., BCBA, LABA
Safety Care Trainer
Hello! I graduated from Endicott college with my masters in Severe Special Education and ABA in 2019. Before that, I pursued my bachelors degree in American Sign Language at Northeastern University. Before joining B.E.S.T I taught at Beverly School for the Best/Children's Center for Communication. I love working with client's that have a wide range of abilities and needs. I enjoy teaching my client's functional skills, and helping to build their independence. I love to build strong relationships with my clients, and am always down to play! Outside of work, I love to hang out with my three dogs, spend too much money at Target, and listen to True Crime podcasts.

Renee Hartz
M.A. MAT, BCBA, LABA
Director of Clinic Operations
In 2009 I crossed paths with an ABA program at a camp in NJ, fell in love with the service, the science, and the people, and never looked back.
I’ve worked in private school, public school, home-based and behavior stabilization settings. As a lifelong learner, I completed grad programs in SPED and ABA and am currently pursuing my PhD (ABD!). I also enjoy serving as adjunct faculty at UMASS Lowell.
In addition to clinical work, I love ACT, OBM, BCBA supervision, and finding new ways to save the world with ABA (social justice, youth development, etc.). I enjoy traveling, strategy games, true crime, and the theater. I spend too much time on Netflix and too much money on Amazon.

Sarah Helm
M.A., BCBA, LABA
Director of Supervision
I began my career in ABA in 2008 and graduated with my Masters in Applied Behavior Analysis in 2012 from Westfield State University. I was the clinical director of the May Center School for Autism and Developmental Disabilities in West Springfield and I have participated in a wide variety of services related to those with special needs. I have a passion for services that provide individuals with quality of life through leisure and recreation.
When I am not practicing ABA I enjoy whittling and woodworking, playing volleyball, and enjoying the great outdoors.
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Stefanie Doucette
M.Ed., BCBA, LABA
I received my BCBA and my Masters in Severe Special Education in 2011 from Endicott College. Prior to working for B.E.S.T, I spent six years at Melmark New England ,and then several more in the public schools as a teacher and a BCBA. Born and raised in Lynn, MA,
I now live in Ipswich and spend as much time as I can at Crane Beach. I am one of those crazy people who get up at 5 am to workout and it gives me the energy I need to keep up with all my
clients. I prefer to drive a standard over an automatic, and I am positive that SVU is the best in
the Law and Order Franchise.