Child on playground. Kids play outdoor.




Providing fun and enjoyable therapy sessions.

Taking a positive approach to problem behaviors.

Valuing your child and their individuality.

Relying on evidence based interventions and analysis.

Our Mission

Providing compassionate and

individualized therapy for young

children diagnosed with autism

by incorporating the positive

approaches of Applied

Behavior Analysis (ABA) and by

empowering parents and

caregivers every step of the way!

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Happy Child Playing Outdoors

Quality ABA

A small business founded by a public school teacher turned BCBA who recognized the importance and need for quality and accessible ABA services. Thrive ABA Therapy is about creating an environment where all the essential elements come together:

Effective Teaching, Supported Parents, and Happy Kiddos!

We thrive by...

  • Creating Consistent and Positive Environments: We believe in routines and environments that are not only predictable but also nurturing and positive.
  • Writing Feasible Plans with Collaboration: Our plans are practical and designed for everyone involved—staff, parents, and caregivers. We work hand in hand with parents to plan behavior interventions.
  • Fun and Enjoyable Therapy Sessions: We don't just focus on the effectiveness of our therapy sessions; it's equally important to us that they are fun and enjoyable for the children we work with.
  • Prioritizing Quality of Life: We aim to improve the quality of life for the children we serve by targeting functional skills that promote independence and communication.
  • Positive Approach to Problem Behaviors: We believe in proactive, preventable approaches to problem behaviors, focusing on teaching new skills and providing attainable reinforcement.
  • Evidence-Based Interventions: Our interventions are based on the latest research and include systematic, step-by-step approaches to meeting goals.
  • Understanding Why Behaviors Occur: We use functional behavior assessment to understand the reasons behind behaviors and teach replacement behaviors to reduce recurrence.
  • Valuing Individuality and Cultural Sensitivity: We respect each child's individuality and cultural background, and we develop goals collaboratively with caregivers. We use language that affirms neurodivergent identities and condemn ableism.
  • Strengths-Based Teaching: We believe in every child's ability to learn and take a strengths-based approach to teaching.
  • Emphasizing Natural Environments and Reinforcers: We teach using items and in environments familiar to the child, making learning relevant and enjoyable. This approach promotes easier skill generalization, as children learn in the environments they access daily.


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Summer Program

With school out for the summer, there can be concerns about academic and social regression. However, we have a solution! Our in-home Summer Program, led by a Board Certified Behavior Analyst (BCBA), is designed to keep your child engaged and learning. Register today to ensure a summer full of growth and fun!

House with a Heart

In-Home Therapy

In-Home ABA therapy for children ages 2 to 9 years with a diagnosis of autism. By offering services in the home, it eliminates the need for additional teaching to generalize skills to the child's natural surroundings. The goal is to make learning and progress seamless in the places that matter most to your child's development.

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School Setting

Support your child's academic progress with ABA therapy in an educational setting. In-school ABA therapy offers customized support to help your child succeed, while also promoting participation in whole group instruction and peer interactions. This approach facilitates their access to more inclusive environments.

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Parent Coaching

Parent coaching equips caregivers with tools and strategies to manage their child's behavior outside of therapy. Collaboration with parents is essential to identify their child's needs and create a tailored plan, guiding them on reinforcing positive behaviors, managing challenges, and promoting skill generalization.

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Active collaboration with a variety of professionals including teachers, speech therapists, occupational therapists, physicians, and all those who play a pivotal role in a child's treatment plan. By forging these connections and maintaining consistency across settings, we create an environment where all aspects of their growth are addressed.


Workshops and Group Trainings

Virtual workshops covering various ABA principles, such as the A-B-C Model, reinforcement, antecedent strategies, behavior management, and communication are offered. These workshops are informative, engaging, and practical, offering teachers and parents real-life tools and strategies.



Let's Work



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We warmly welcome children ages 2 - 9 years, diagnosed with autism


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Kristen Gainer


Kristen Gainer is a highly accomplished educator and the founder of Thrive ABA Therapy. With a deep dedication to education since 2005, she has made significant contributions in the field. Kristen's expertise spans various domains, as she holds multiple certifications and qualifications. She is a Board Certified Behavior Analyst (BCBA) and a Nationally Board Certified Teacher (NBCT). She earned her Master's in Teaching Degree from Seattle University and completed Applied Behavior Analysis coursework at the University of Washington.

Throughout her career, Kristen has actively engaged in the educational community. She served on Highline College's Professional Education Advisory Board, contributing her insights and expertise to further the field of education. Kristen's teaching experience covers a wide range of areas, including special education, early childhood education, and supporting children on the autism spectrum. She holds teaching certificates in special education and elementary education, allowing her to make a positive impact across various grade levels.

With a focus on children with autism, Kristen has gained many years of experience and extensive knowledge in this area. She is well-versed in evidence-based interventions that promote growth and development. Her expertise includes implementing strategies such as prompting, schedules of reinforcement, antecedent and consequence strategies, visual supports, shaping, and the Picture Exchange Communication System (PECS).

In her free time, she immerses herself in the natural beauty of the Pacific Northwest. Whether walking, hiking, camping, or spending time at the beach, Kristen enjoys exploring the outdoors with her family, finding inspiration and rejuvenation in nature.


🌟 Join our team and make a difference in the lives of families and children! 🌟

We're on the lookout for a compassionate and dedicated Board Certified Behavior Analyst (BCBA) to join our team. Enjoy a supportive environment, flexible scheduling, and the chance to contribute to the growth of a small business. Your responsibilities will include providing direct ABA services, collaborating with families and professionals, and staying updated on best practices.

We offer competitive hourly rates, flexible scheduling, and benefits like accrued sick time and mileage reimbursement. Qualifications include BCBA certification, a Washington State Behavior Analyst License, relevant education, CPR/First Aid certification, and proven experience working with individuals with ASD or related developmental disabilities.

Ready to help families and children thrive? Apply now and be part of our mission! 🌈







Thrive ABA Therapy LLC

serving King County, Washington