Diagnosis can be scary. As parents of a child with Autism, we understand firsthand the anxiety that comes with learning your child is different.

From left to right: Brad, Susan and Max Fenton. Brad and Susan are the founders of Abacus Therapies

But different shouldn’t mean your child has to be misunderstood or alienated. And different certainly doesn’t mean they can’t live a full and rich life with warm and significant relationships.

Our own experience taught us that the heart of any autism therapy should be the child. Not the process. Not the diagnosis. Start with your child’s interests and build from there. Understand their specific needs. Create a window into how they see the world and build new skills and behaviors that are authentic to them. Our team is trained in a range of interdisciplinary therapies so we can build a customized approach that works for your child and your family.

We’ve been there. Let us help.

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Our Manifest


To offer best-in-class professionals using a child-led approach to autism therapy.


To support families like ours through diagnosis and beyond with personalized, professional care.


We understand that every diagnosis is different, so our team is trained in a combination of therapies to explore your child’s full and unique potential.

Meet the Abacus Team

Sep Niakan

Executive Director

Quadrilingual reformed tech nerd who loves funny movies, Asian food and all types of animals.  Dedicated father and husband doing good in the world.

Brad Fenton

Chief Relationship Officer

Dog loving stand-up comedy enthusiast who enjoys mango season, running and UCONN Hoops. Father and husband who is dedicated to advocating for families.

Susan Cywiak

Parent Support and Training

Proud Native of Venezuela, Doctor of Pharmacy, loving wife and mother. Enjoys a nice vino tinto, connecting with other moms and promoting Autism awareness and acceptance.

Stephanie Bienstock

Client Care Manager

Native Floridian supermom of two, wife of one.  Enjoys real estate, a good cup of coffee and is dedicated to pairing families with quality therapists.

Sumner Flynn

Clinical Supervisor, Board Certified Behavior Analyst

Sumner has been certified as a BCBA since 2011. Her expertise includes verbal behavior, social skills development, and reduction of severe problem behaviors.

Karline Nazzaro

Board Certified Behavior Analyst

Proud native Bostonian (and sports fan), loves Latin Music, Florida sunshine and animals. Uber Passenger Rating 5.0. Former Special Education Teacher who enjoys helping children with her big heart and smile.

Natalie Schad


Upbeat Floridian transplant via California. Joyfully helping children reach their full potential since 2014 using an individualized and natural approach. Specializes in early intervention, verbal behavior and feeding therapy.

Sahar Dahsheh


Multi-lingual world citizen who believes that homogeneity is boring and whose calling in life is to constantly grow and help others do the same.

Arlaine Farkas

Family Care Administrator

Mother of two.  Enjoys dancing and warm weather.   Math lover, who leads the administration team during the week, enjoys delicious cakes anytime.  

Cathy Kryvenko

Scheduling and HR assistant (onboarding)

Animal loving Scheduling Coordinator with an artist’s soul.  Loves Noire Jazz, Rock Music, Art House films, drawing and philosophy.  

Ecaterina "Kate" Gurenco

Billing Manager

Passionate Eastern European, travel addict and wannabe master chef. Loves a well-prepared meal and working with numbers. Believes all wishes come true if formulated correctly.

Roberta Costa

Health Insurance Coordinator

Beach lover,  spending time with family and friends makes everything better. Traveling and dancing keep her busy. Helping others is what it’s all about.  

Stephanie Howe

HR Manager

Proud mother of one son and two rescue dogs. Masters in Applied Behavioral Analysis. Former collegiate tennis player and current sushi aficionado. World traveler who welcomes meeting kind people from all walks of life.

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