Our Staff


Christine Kim Walton, PhD, BCBA-D 


Dr. Walton is the Director of Behavior Analysis No Ka Oi, Inc. She was born and raised in Honolulu, Hawaii and has been working with children and adults with autism and developmental disabilities for 20 years. She earned her Bachelor's Degree in Psychology from Loyola Marymount University, her Master's Degree in Psychology from the University of Nevada Reno's Behavior Analysis Program under the direction of Dr. Jim Carr, and her Ph.D. in Psychology in West Virginia University's Behavior Analysis Program under the direction of Dr. Philip Chase. In addition, she respecialized in Clinical Psychology at the University of Hawai'i and completed her clinical internship at the Department of Veterans Affairs. She worked as the Behavior Consult Team Coordinator and the Mental Health Division and Developmental Disabilities Division Liaison for people with co-occurring developmental disablities and mental illness in the Department of Health. She currently works part-time at the Developmental Disabilities Division. Dr. Walton has been a Board Certified Behavior Analyst since 2000 and is also a Licensed Clinical Psychologist. Her expertise and interests are in the area of applied behavior analysis, behavioral instruction including precision teaching and fluency-based instruction, verbal behavior, functional behavioral assessments, positive behavior supports, pediatric feeding disorders, severe aggression and self-injurious behaviors, and organizational behavior management. In her free time she enjoys running, hiking, and yoga.


Brandi Chew, PhD


Dr. Chew is a Licensed Psychologist who specializes in the assessment of developmental disabilities in young children (ages 0-5) and maternal mental health. She has worked extensively in conducting developmental and psycho-educational evaluations, including assessments for Autism Spectrum Disorders and Learning Disabilities (LD). Dr. Chew encourages individual and family wellness through an evidenced-based and developmentally informed approach to assessment, diagnosis, and intervention. Dr. Chew earned her Master's Degree and Ph.D. in Counseling Psychology from Colorado State University. She completed a postdoctoral fellowship with The Children’s Health Council in Palo Alto, CA, where she specialized in early childhood mental health and development. In addition to her time at Behavior Analysis No Ka Oi, Dr. Chew is a psychologist with Army Community Service at Schofield Barracks, HI.


Joshua Fouts, PhD, BCBA


Dr. Joshua Fouts is a Board Certified Behavior Analyst and a lecturer at the University of Hawai‘i at Mānoa. He has Ph.D. in Education at University of Hawaii, a M.Ed in Functional Analysis at Gonzaga University, and a B.A. in Special Education. He just recently completed his post doctoral training in leadership and educational services for individuals with neurodevelopmental and other disabilities. As a behavior analyst, Dr. Fouts implements solutions that use empirically supported best practice strategies and that are based on the principles of Applied Behavior Analysis. He specializes in finding solutions for challenging behaviors such as aggression, self-injurious behaviors, tantrums, and non-compliance. As a lecturer at the University of Hawaii he teaches in the Special Education Department in the College of Education. He teaches classes in behavior management, severe disabilities, and assistive technology. He also is a field supervisor for students who are completing their field experience and/or student teaching in the severe disability and autism track. His work experience includes being a behavior consultant, teacher in an autism inclusion school, researcher at the Center on Disability Studies, teacher in a special education resource room, a clinician in an outpatient ABA clinic, and 1 to 1 aid in an adult group home. In his free time, Dr. Fouts coaches college soccer and is a novice gardener who enjoys growing tropicals, succulents, and edibles.


Lawrence Tatekawa, EdS, BCBA


Lawrence is a Board Certified Behavior Analyst and School Psychologist. He was raised in Mililani, Hawaii and has been working with children and adults with autism and developmental disabilities for over 10 years. He earned his Bachelor's Degree in Psychology and Educational Specialist's Degree in School Psychology from the University of Northern Colorado. Prior to obtaining his certification in behavior analysis Lawrence served as a school psychologist for 5 years. As a school psychologist, Lawrence implemented school-wide response to intervention (RTI) systems, designed and implemented student academic and behavioral interventions. In addition, he served as the Director of School Programs at a center-based school specializing in educating children with autism. His interests include but are not limited to: applied behavior analysis, verbal behavior, precision teaching, direct instruction, functional behavioral assessments, and positive behavior supports. For fun he enjoys spending quality time with his family, coaching wrestling, surfing and Crossfit.


Jessica Carvalho, MEd, BCBA


Jessica is a Board Certified Behavior Analyst with a Masters degree in Special Education K-12, from Chaminade University in Honolulu Hawaii. She also completed her Bachelors of Science in Psychology at Bridgewater State University in Massachusetts and BCBA coursework from Florida Institute of Technology. Jessica has over 12 years of experience working with children and adults with autism and other disabilities. She worked as a paraprofessional for many years in Massachusetts and Hawaii as well as a licensed special education teacher with the DOE for five years and a tutor at BANKO. In her free time she enjoys spending time with her dog, hiking, and reading.



Sara Sato, MEd, BCBA


Sara is a Board Certified Behavior Analyst and holds a Masters in Special Education, Severe Disabilities/Autism Specialization from the University of Hawai’i at Manoa. She also completed her Bachelors of Arts in Psychology and Japanese from UHM and BCBA coursework from Florida Institute of Technology. Sara has worked with children with Autism and other disabilities since 1999. She has served as an Educational Assistant in Special Education classrooms, as a paraprofessional for several behavioral companies, special education teacher in the DOE and as a Lead Instructor at BANKO. Sara recently returned to Hawai’i after living in San Francisco for 2 years. In San Francisco, Sara was a Behavior Analyst and member of a management team of an ABA company. Sara enjoys spending time with her family, going to farmers markets and practicing yoga.


Nicole Heber, MA, BCBA


Nicole is a Board Certified Behavior Analyst who received her Bachelor’s in Behavioral Neuroscience from Purdue University in Indiana and her Master’s in Applied Behavior Analysis from The Chicago School of Professional Psychology in Illinois. Nicole has experience working in various settings with adults and children with Autism Spectrum Disorder and other disabilities. In her free time, Nicole enjoys reading, going to the/ watching movies, taking her dog on walks, and Zumba.


Sarah Negron,  BSW


Sarah received her Bachelors in Social Work, with a minor in Art at Wheelock College located in Boston, Massachusetts. In college she played softball, and ran cross country. Prior to working in Hawaii Sarah worked as a child care provider for multiple families. In her free time she likes to sew, watch documentaries and go to the beach.


Joni Wong, MSW


Joni received her Bachelor of Social Work from University of Portland and her Master of Social Work, with the concentration area of Child and Family, from University of Hawaii, Manoa. Joni has worked with children and teenagers in various settings for many years; as a part-time teacher at an alternative learning center, as an after school care group leader, and as a basketball and softball coach. In her free time, she enjoys boxing for fitness, watching movies, and outdoor activities with friends and family.


Rebecca Byrnes, BA


Rebecca received a bachelors degree in Economics and a bachelors degree in Environmental Studies from University of California in Santa Cruz. Before working at Hawaii Behavior Analysis No Ka Oi, Rebecca worked for an ABA company in San Francisco and had been a swim instructor for over ten years. She is currently working on her masters in Special Education for severe/multiple disabilities/autism from University of Hawaii, Manoa. In her free time, Rebecca enjoys hiking, playing violin, and exploring Hawaii.


Shannon Ching, BA, BCaBA

Shannon received her Bachelors of Arts in Social Sciences with a Concentration in Psychology from the University of Hawaii--West Oahu and completed her BCaBA coursework from Florida Institute of Technology. She volunteered as a summer camp counselor for the Muscular Dystrophy Association for several years and has worked as a Patient Registrar at Kapiolani Medical Center for Women and Children for over three years. She was born and raised on Oahu and enjoys everything the island has to offer, especially the food and the ocean. Shannon loves having fun with her son swimming, hiking, singing, and dancing!


Elizabeth Connolly, BA


Liz received her Bachelors in Elementary Education and Mathematics with a minor in History from Wheelock College located in Boston, Massachusetts. In college, Liz ran cross country and tutored other college students. Prior to working in Hawaii, Liz has worked in a first and third grade classroom as well as substitute teaching in a range of classrooms in a Boston suburb. In her free time, Liz enjoys reading books, going on runs, and cooking.

Tiffany Wa'ahila, BA


Tiffany received her bachelor's degree in psychology at the University of Hawaii at Manoa. She is from the Big Island and moved to Oahu to pursue her education. Tiffany plans to obtain her masters and her PhD in Clinical Psychology. Outside of work and school, Tiffany loves going to the beach, hanging out with friends, and dancing hula.


Jennifer Reyes


Jennifer Reyes is our office assistant. She balances her time between two secretarial positions and volunteering at her local church in which includes teaching 2-3-year-old children. Jennifer enjoys playing the ukulele, singing, and spending time with her family, friends, and church 'ohana.


Elizabeth Smith, MEd


Elizabeth is a Students Services Coordinator for the Hawaii Department of Education (DOE). Previously, she was a preschool and lower elementary Special Education Teacher for the DOE. Elizabeth has a Bachelors of Science in Psychology with an emphasis on Special Education as well as a masters degree in Early Childhood Special Education. Both degrees were earned at Grand Valley State University in Michigan. Prior to working for Behavior Analysis No Ka Oi and the Hawaii Department of Education, Elizabeth worked as a substitute teacher in Michigan and played softball for Grand Valley State University. Elizabeth enjoys playing volleyball and softball on her spare time.


Nicole Fleming, B.A.


Nicole Fleming received her bachelor's degree in Liberal Arts with a concentration in Social Behavioral Science at Soka University of America in Orange County, California. Nicole spent her early childhood years in Japan and then moved to Hawaii where she completed her primary and secondary education. She has been living on the Leeward side of the island since 2000. In college, she joined the taiko (Japanese drumming) club and has played ever since. She currently teaches the art of taiko to the youth at her local community center. In her free time, she enjoys spending time with family and friends, reading, kayaking, and cardio exercise..


Barley Walton, D.O.G.


Barley is a 5 year old English Cocker Spaniel and hails from the land down under. She has been a part of Behavior Analysis No Ka Oi, Inc. from its inception. Barley participates in social events with the children at the clinic and is our mascot. Barley enjoys swimming, getting her ears scratched, and running during her free time. She loves greenies and mummies homemade beef jerkey.


Addie Carvalho, D.O.G.


Addie is a one year old Goldendoodle puppy. Addie enjoys spending time at BANKO, participating in sessions at the clinic, and getting to play with the children. In her free time she likes going on long hikes and walks, getting belly rubs, and spending time with her Mama.