Charlotte (Charlie) Bell and Ramla Chaudhry founded 2020 Behavior, LLC in 2018. With almost 40 years of combined experience in the field of ABA, Charlie and Ramla created 2020 Behavior, LLC with the goal of breaking away from the traditional 2-3 tiered ABA model and offering a one-of-a-kind service to families in the Bay Area.
Charlie and Ramla handpick only the very best BCBAs and take pride in maintaining a small, close-knit, and friendly company, with BCBAs who are trauma-informed, dynamic, creative and compassionate.
2020 Behavior conducts a highly rigorous 7 step hiring process to ensure all of our BCBAs meet the highest standard in the field.
All of our BCBAs have between 7 and 20 yrs of experience in the field of ABA.
Charlie Bell, MA, BCBA is co-founder at 2020 Behavior, LLC.
Charlie has over 20 years of experience in the field of ABA. Prior to founding 2020 Behavior, LLC Charlie worked within schools, clinics and home settings in Los Angeles, Raleigh, London, Sydney and Singapore. Until 2017 Charlie was based in Singapore where she managed her own practice and worked with families across SE Asia, providing direct services, parent training, supervision, school consultation, social skills training and international consultation to clients with ASD and related disorders.
Originally from the UK, Charlie has a Masters in Psychology from the University of St. Andrews (Scotland) and holds a post-graduate certification in Behavior Analysis from Florida Institute of Technology.
Charlie brings warmth, humor and creativity into her practice. Charlie specializes in Early Intervention and Verbal Behavior.
Ramla Chaudhry, MA is co-founder at 2020 Behavior, LLC.
Ramla has 17 years of experience in the field of ABA. Prior to 2020 Behavior, Ramla worked within schools and home settings in Milpitas, Los Altos, San Jose, and Monterey.
Ramla has a Masters in Human Behavior.
Ramla is passionate about providing best practice for the 2020 Behavior families, as well as providing a supportive, compassionate and collaborative environment for our BCBAs
Chelsea Sioxson Laxa, MA, BCBA has worked with neurodiverse individuals for over a decade. She earned her master’s degree in Special Education with a focus in early childhood and served as a credentialed teacher in autism-specific classrooms before becoming a BCBA. Chelsea has experience directing behavioral programs in school, clinic & in-home settings. She routinely provides behavioral consultations for preschools, recreational programs, and homeschool families in the Bay Area, and has served on the Advisory Board for the Early Childhood Education department at San Jose City College. Chelsea has a special interest in leadership, diversity, and inclusion, and is co-authoring 2 online courses that explore those specific topics through a behavior-analytic lens.
When she isn’t wearing her BCBA hat, Chelsea is the Executive Director and founder of a nonprofit that provides inclusive dance classes and peer mentorship opportunities to young children. She and her husband also run a travel blog that caters to other couples who enjoy vacationing on a budget! On her rare days off, you can find Chelsea laying in her hammock listening to true crime podcasts with her puppy and a hot cup of tea.
Andrea Stone MA, BCBA, moved to the Bay Area from Chicago, IL, in July 2021 and has had the pleasure of working with children and adults with autism in homes, schools, clinics, and various community environments. She practiced ABA in Wisconsin and Illinois before relocating to California. Most recently, Andrea served as Clinical Director for a clinic providing comprehensive in-home ABA services to children with autism.
Andrea is passionate about teaching functional communication to learners of all ages, prioritizing client autonomy and happiness, and providing compassionate, high-quality services. She particularly enjoys providing caregiver education and support to empower caregivers by including them in all therapy goals and creating realistic plans for the whole family.
Andrea enjoys hiking, exploring California, and cuddling with her dog, Simon, in her free time.Stone
Kinga Wołos-Zachmeier, MA, BCBA is originally from Poland and has had the pleasure of working with children, teenagers and adults with autism in a variety of settings, including home, schools and clinics. She practiced ABA in Indiana before moving to California. Most recently Kinga served as Clinical Director at a school specializing in supporting students with behavioral challenges.
Kinga is passionate about behavior analysis and she finds clients’ progress to be the most rewarding and motivating aspect of her work. She focuses on what clients can do instead of their deficits and helps them build up skills to reach their full potential. Kinga considers parent training to be an essential component of every successful intervention.
Aside from ABA, Kinga enjoys travelling, learning about different cultures and hiking. She recently began to foster kittens.
Victoria Moss, M.A., BCBA, LBA has many years of experience working with individuals ages 2-28 with Autism and other diagnoses (e.g., ADHD, ODD, bipolar disorder, anxiety, Down’s Syndrome). Over the years, she has worked as a Behavior Technician, Parent Trainer, Case Manager/Behavior Supervisor, and most recently as a Clinical Director overseeing a region of more than 50 clients.
Victoria received her B.A. in Psychology, with a minor in Spanish, from California State University, Long Beach in 2009. She earned her M.A. in Clinical Psychology, with an emphasis in Neuropsychology, from California State University, Dominguez Hills in 2016, and she wrote her Master’s thesis on the effects of meditation on the structure and function of the frontal lobes. Victoria attended Florida Institute of Technology for her coursework in Applied Behavior Analysis, and obtained her BCBA certification in 2016. She has had the pleasure of serving hundreds of children and families. Outside of ABA, Victoria has interests in clinical psychology, neuropsychology, psychopharmacology, mindfulness, and acceptance and commitment therapy; and she continuously integrates her knowledge of these fields into her ABA practice. Within the field of ABA, Victoria is passionate about staff training, parent training, early intervention, and executive functioning training for older clients.
Victoria is originally from Southern California. When she isn’t working, she enjoys singing, dancing, cooking, reading, gardening, and spending time with her dog and her loved ones.
Shannon Durand, M.Ed., BCBA moved to the Bay Area from Central Texas in December 2010 with her husband and three children. She has worked with children and young adults with autism and other developmental disabilities.
Shannon has worked primarily in the home and school settings, and specializes in working with young children in early intervention. She also really enjoys teaching functional skills that lead to an individual’s greater independence which include increasing functional communication, using the toilet independently, eating a variety of foods, dressing oneself, etc.
Most recently Shannon has been a preschool teacher in an inclusive ABA-based classroom, and has provided additional supports to those students and families in the program with autism and other delays and disabilities. She is happiest when working directly with children and their families!
Ethan Lin, M.Ed, BCBA is a Bay Area native growing up in Cupertino. He discovered a passion for ABA when he started as a Behavior Therapist in his first job out of college. He has since received his Master’s in Special Education Early Childhood Education from Vanderbilt University and his BCBA certification.
Ethan has experience working with toddlers, children, and young adults in home, center, and school-based settings. He loves using his skills and expertise to teach children of all ages new and functional skills to reach their highest potential. Besides that, he also loves to work with families of all backgrounds and to provide parent training.
In his free time, Ethan enjoys cooking, being outdoors, and having a good laugh. You can also find him playing sports, video games, and board games with friends and family.
Ashley Jackowski, MA, BCBA has experience providing ABA as a behavioral therapist, program supervisor, and a clinical manager for ABA agencies in the East Bay Area of Northern California.
Her favorite aspects of ABA include improving socially significant behaviors, providing inclusive and collaborative services with other professionals, and utilizing clinically effective assessment tools to help drive treatment. She also has a passion for family education and understands how crucial and imperative parent/caregiver training is for the generalization and maintenance of skills.
She enjoys working with families primarily within their home and looks forward to providing treatment at a level that allows for the most direct support.
Chelsea vonDeisenroth, MA, BCBA, grew up in the Bay Area and earned her Bachelor’s degrees in psychology and sociology at the University of Oregon. She then attained her Masters degree in Applied Behavior Analysis at Ball State University.
Chelsea most recently worked as a clinician at an ABA company in San Jose, where she assessed and treated infants, children, and teenagers that had been diagnosed with various developmental disabilities. She especially enjoys helping her clients improve their independent living capabilities by enhancing their social, communication, and adaptive skills.
Besides ABA, Chelsea likes spending time with her family and friends. While she doesn’t have any pets of her own, she loves animals and she seizes every opportunity to pet dogs as they pass her on the sidewalk. She also enjoys hiking, exploring, doing yoga, and tending to her plants.
Samantha Crisologo, M.Ed., BCBA has experience working with children and adolescents with autism in various settings, including home, community, schools, and clinics. She has experience providing Applied Behavior Analysis as a behavior technician, case manager, behavior supervisor and clinical director for ABA agencies in the Sacramento and San Jose areas.
While in college, she became a behavior technician (per her brother’s recommendation) and fell in love with ABA. Upon graduating, she decided to pursue a career and later became a BCBA. She enjoys using her expertise and skills to teach functional skills to promote independence and generalization. Her main areas of interest include verbal behavior, social skills, and independent living skills.
In her free time, Samantha enjoys hanging out with her dog, Nala, and her husband. She also enjoys creating nail art, spending time with her family and friends, and listening to/watching true crime.
Monica Woodworth M.Ed., BCBA, LBA discovered her passion for ABA during her 10 years as a special education teacher. She was introduced to ABA and knew this was how she could better serve children with Autism and their families. Monica received her Masters in Special Education with a Concentration in Applied Behavior Analysis and continued to work in the school setting as a BCBA for Texas School for the Deaf where she provided ABA services to children with a variety of conditions including emotional disturbance, oppositional defiance disorder, childhood trauma, ADHD, and intellectual disabilities. Monica has also provided ABA services in the home, clinic, and community. She has experience working with children from the age of 3 to adults in their 30’s. Monica is a firm believer in collaborating with other professionals including teachers, speech therapists, occupational therapists, and pediatricians in order to provide the very best therapy for each individual.
Monica lives in Austin with her handsome husband, sweet Baby Girl Poppy, and cute pups:
Lucy, Callie, and Roscoe. She enjoys traveling, seeing as many concerts as possible, cheering for her Longhorns (Hook Em’!), trying new restaurants, and introducing Poppy to everything the world has to offer.
Andrea Stone MA, BCBA, moved to the Bay Area from Chicago, IL, in July 2021 and has had the pleasure of working with children and adults with autism in homes, schools, clinics, and various community environments. She practiced ABA in Wisconsin and Illinois before relocating to California. Most recently, Andrea served as Clinical Director for a clinic providing comprehensive in-home ABA services to children with autism.
Andrea is passionate about teaching functional communication to learners of all ages, prioritizing client autonomy and happiness, and providing compassionate, high-quality services. She particularly enjoys providing caregiver education and support to empower caregivers by including them in all therapy goals and creating realistic plans for the whole family.
Andrea enjoys hiking, exploring California, and cuddling with her dog, Simon, in her free time.Stone
Shannon Durand, M.Ed., BCBA moved to the Bay Area from Central Texas in December 2010 with her husband and three children. She has worked with children and young adults with autism and other developmental disabilities.
Shannon has worked primarily in the home and school settings, and specializes in working with young children in early intervention. She also really enjoys teaching functional skills that lead to an individual’s greater independence which include increasing functional communication, using the toilet independently, eating a variety of foods, dressing oneself, etc.
Most recently Shannon has been a preschool teacher in an inclusive ABA-based classroom, and has provided additional supports to those students and families in the program with autism and other delays and disabilities. She is happiest when working directly with children and their families!
Michelle Herrejon, M.Ed., BCBA, has experience working with children 18 months to 16 years old with ASD in the home and school setting. She has had the opportunity to provide ABA to students with a variety of conditions ranging from intellectual disabilities, emotional disturbance, oppositional defiance, and trauma in a school setting. Michelle strives to support families and learners by teaching behaviors that are functional and significant. She enjoys getting to individualize programs to best meet learner’s needs and enhance their quality of life..
Kellie Bohlke, MA, BCBA, has experience with ABA and educational services to individuals ages 2-18 in schools, homes, and clinics in the Bay Area. She is passionate about using her background in Elementary Education and expertise in the field of Applied Behavior Analysis to help learner’s develop skills that build upon their strengths. Prior to joining 2020 Behavior, Kellie worked as a Lead Teacher, and then as the Clinical Director, for a non-public school serving students in need of intensive behavioral support and individualized educational programs. Her particular expertise includes teaching self-management, functional communication, social skills, and providing support to families and staff to encourage collaborative, learner-centered programs. Kellie is originally from Minnesota and enjoys spending time outdoors, hiking, dancing, biking, and reading.
Wendy Kwang, MS, BCBA is a San Francisco native currently residing in San Mateo. She earned a bachelor’s degree in psychology from University of California, Santa Cruz. After college, she worked as a behavior technician for several years, fell in love with the field of Applied Behavior Analysis (ABA), and moved on to earn her master’s degree in Applied Behavior Analysis from California State University, Northridge. Her experience involves designing and overseeing behavior reduction and skill acquisition programs for neurodiverse and neurotypical individuals ages 2 to 18 in their home, school, and community settings.
She is deeply passionate about designing individualized programs based on each client’s skillset, preferences, values, and responses to various learning strategies. She believes that collaboration with parents, teachers, and other service providers is absolutely essential for skills generalization and progress maximization. She also loves teaching any communication and daily living skills that will empower her clients to advocate for themselves and to increase their independence.
Besides ABA, she enjoys spending time with her loved ones, traveling to new places, and trying new restaurants and coffee shops. During the weekend, you may spot her stuffing her face with food or greeting every dog who passes her by.
Kimberly Gonzalez M.Ed., BCBA was born and raised in Southern California and moved to the San Francisco Bay Area in 2007. After graduating from San Francisco State University, a friend suggested she apply for a Behavior Technician position with an Applied Behavior Analysis (ABA) agency in the area. There, Kimberly fell in love with the field and the impact she had on the lives of her clients. Kimberly has had the opportunity to work with clients of various demographics and ages. She has also had the opportunity to provide services and support in several environments— school, home and social groups.
Kimberly earned a Master’s degree in Special Education from Notre Dame de Namur University in Belmont, California and she completed her BCBA course work remotely through the Florida Institute of Technology in Melbourne, Florida.
Throughout the years, Kimberly has had the opportunity to hold several positions within the field— Behavior Technician, Program Supervisor, and now BCBA, which has allowed her to learn about the behavioral processes and implementations at each ABA level. Kimberly is passionate about her work in the field and thrives on seeing her clients develop and attain skills in all domains. In order to ensure the highest level of success, she also is dedicated to facilitating caregiver training, so they too can support their children outside of treatment. Her ample experience in the field has taught her the value of patience, encouragement, commitment and the true meaning of “it takes a village”. Each person involved in a client’s case helps shape the success and future of that child, and is a vital part of the therapy process.
In her spare time, Kimberly also enjoys hiking, traveling, reading, and spending time with her family, friends, and dog!
Denise Marshall-Tucker, MS, BCBA, recently moved to the San Francisco Bay Area from Cherry Hill, New Jersey. She earned her Master of Science in School Psychology with a concentration in Behavior Analysis from Philadelphia College of Osteopathic Medicine. She has experience with learners ages 2 through 22 with various diagnoses and environments including clinic, school, and home. Of course, Denise believes learning should be fun! Her passion for working with children and her love of learning make applied behavior analysis a perfect fit for her. Having the right tools for the job is important and so is designing an individualized treatment plan that provides a family with the ideal strategies and interventions to meet their goals. Collaboration with other providers in the learner’s network streamlines the path to success. Denise finds joy in fostering communication, independence, and confidence which help an individual to thrive in their world.
Sofya Hadley, MS BCBA is a Russia native, who grew up in the Pacific North West. She completed her Bachelors of Psychology in 2018 from Corban University, and finished her Masters of Special Education from Portland State University in 2021. Sofya has had the opportunity to work with individuals on the Autism Spectrum between the ages of 2 – 22 in a variety of settings, including the clinic setting, home based services, school based services, and telehealth. Throughout the years Sofya has held the roles of a Behavior Technician, Assistant Program Supervisor, and a Board Certified Behavior Analyst (BCBA). Most recently, Sofya has been conducting telehealth based initial treatment assessments and providing telehealth supervision for preschool and school aged children for an Applied Behavior Analysis (ABA) agency. Her years in the field have taught her the value of team based treatment and the importance of individualized approaches to the clients and their families. Sofya strongly believes in the impact of culture on the every day functioning of individuals and strives to learn and incorporate the culture of the clients and their families into their treatment. When not working, Sofya enjoys spending time with her family, traveling, and experimenting with new recipes!
Her passion for teaching children comes from working with her first autistic student and seeing tangible progress in the student’s communication. She also has dedicated her professional career to creating strategies that bring families into the therapeutic environment for children with special needs. Parent education and caregiver involvement are her passions and she believes these are the cornerstones of successful ABA programs.
Kinga Wołos-Zachmeier, MA, BCBA is originally from Poland and has had the pleasure of working with children, teenagers and adults with autism in a variety of settings, including home, schools and clinics. She practiced ABA in Indiana before moving to California. Most recently Kinga served as Clinical Director at a school specializing in supporting students with behavioral challenges.
Kinga is passionate about behavior analysis and she finds clients’ progress to be the most rewarding and motivating aspect of her work. She focuses on what clients can do instead of their deficits and helps them build up skills to reach their full potential. Kinga considers parent training to be an essential component of every successful intervention.
Aside from ABA, Kinga enjoys travelling, learning about different cultures and hiking. She recently began to foster kittens.
Samantha Chau, MS, BCBA is a Bay Area native with roots in the Peninsula. She earned her Bachelor’s in sociology, with a minor in Asian American studies at UC Davis. With a background as a Playworks coach and performing in improv, there was a natural draw to educate as a behavioral therapist. Samantha graduated summa cum laude with her Master’s in psychology, with an emphasis on applied behavioral analysis, at Capella University.
Samantha strives to bring a warm, engaging, collaborative, and culturally valid approach toward behavioral care into all her cases. Her treatment plan development and implementation has included clients ages 2-28. Samantha specializes in language development, social skills, independent living skills and caregiver training. She is licensed to teach PEERS®, an evidence-based social skills training developed at UCLA. Throughout these years of practice, Samantha has learned the key to meaningful behavioral intervention is to foster the existing motivation for each individual client. There is nothing she would rather do as a career!
Samantha can be seen in her natural habitat on the weekends, which is a dessert in one hand and home renovation magazines in the other. She enjoys hosting board game nights with friends and family as it is the recipe for good times with good company.
Tasha Jayakoddy, MA, BCBA, is a Bay Area native and earned her Bachelor’s degree in psychology from Saint Mary’s College of California. She then received her Masters degree in Special Education with an emphasis in Applied Behavior Analysis from Arizona State University.
Tasha most recently worked as a clinician at Head Start in San Francisco, where she designed and implemented behavior support plans and goals for children ages 2-5. Tasha collaborated with mental health consultants, case managers, speech and language pathologists, occupational therapists, and teaching staff on providing each client an individualized behavior intervention based on ABA principles, while also incorporating trauma-informed practices into treatment. Simultaneously, she worked at an in-home ABA agency as a program coordinator, working with children on the autism spectrum, ages 3-18. Tasha’s focus is targeting socially significant behaviors relative to an individual’s environment and emphasizes the importance of a multi-disciplinary approach to behavior intervention. Tasha’s expertise and passions are centered around early intervention, self-regulation, social skills, and independent living skills. She also wants to continue her work of providing quality and equitable behavior intervention services to all and believes everyone deserves access to quality behavior services.
Besides ABA, Tasha loves to explore the outdoors and travel with friends and family. She also loves to stay active by going on hikes, strength training, and indoor cycling. Tasha also loves to try new food spots all around the Bay Area. You can find her exploring a new food or coffee shop almost every weekend.
Sharon McClain, MA,; BCBA has experience working with clients ages 18 months to 18 years in home, center, community, and school-based settings. She is passionate about providing strength-based, trauma- informed, effective behavior analytic treatment for her clients. Her main areas of interests include verbal behavior, functional replacement skills, and social skills. She also enjoys collaborating with her clients, their parents, and other service providers to individualize each client’s ABA treatment plan.
Sharon has worked with neurodivergent youth for 20 years. When she began working in ABA Sharon immediately fell in love with the science that allowed for such meaningful skill development and reduction of challenging behaviors. Seeing her clients progress and access more and more natural reinforcers is her greatest motivator. In her spare time, Sharon enjoys traveling, hiking, surfing on California’s beautiful coastline, and spending time with her friends and family.
Vincent Lee, M.S., BCBA is a San Francisco native who has recently moved to Santa Clara. He earned his Bachelor’s degree in Psychology & Social Behavior from the University of California, Irvine. Vincent fell into the field of ABA after college due to a recommendation from a roommate. He served as a Behavior Therapist for a couple of years, serving clients in home, clinic, and school-based settings, before taking a break from the field. After a brief stint working in a residential treatment facility with children diagnosed with Emotional Disorders, Vincent returned to the field of ABA as a Clinical Supervisor. Vincent earned his Master’s degree in Applied Behavior Analysis from National University, where he now serves as an adjunct faculty member, teaching classes in the Master’s in ABA program. Vincent firmly advocates for strong collaboration between all service providers in a client’s team. He loves to hear from teachers, speech therapists, school psychologists, etc. as a way to ensure all members are on the same page in a client’s treatment. Additionally (likely due to the psych background), Vincent places high importance on the mental health wellbeing of his clients and their family members. He wants to make sure everyone is at operating at their best when managing challenging behaviors or patiently teaching skills.
Denise Marshall-Tucker, MS, BCBA, recently moved to the San Francisco Bay Area from Cherry Hill, New Jersey. She earned her Master of Science in School Psychology with a concentration in Behavior Analysis from Philadelphia College of Osteopathic Medicine. She has experience with learners ages 2 through 22 with various diagnoses and environments including clinic, school, and home. Of course, Denise believes learning should be fun! Her passion for working with children and her love of learning make applied behavior analysis a perfect fit for her. Having the right tools for the job is important and so is designing an individualized treatment plan that provides a family with the ideal strategies and interventions to meet their goals. Collaboration with other providers in the learner’s network streamlines the path to success. Denise finds joy in fostering communication, independence, and confidence which help an individual to thrive in their world.
Monica Woodworth M.Ed., BCBA, LBA discovered her passion for ABA during her 10 years as a special education teacher. She was introduced to ABA and knew this was how she could better serve children with Autism and their families. Monica received her Masters in Special Education with a Concentration in Applied Behavior Analysis and continued to work in the school setting as a BCBA for Texas School for the Deaf where she provided ABA services to children with a variety of conditions including emotional disturbance, oppositional defiance disorder, childhood trauma, ADHD, and intellectual disabilities. Monica has also provided ABA services in the home, clinic, and community. She has experience working with children from the age of 3 to adults in their 30’s. Monica is a firm believer in collaborating with other professionals including teachers, speech therapists, occupational therapists, and pediatricians in order to provide the very best therapy for each individual.
Monica lives in Austin with her handsome husband, sweet Baby Girl Poppy, and cute pups:
Lucy, Callie, and Roscoe. She enjoys traveling, seeing as many concerts as possible, cheering for her Longhorns (Hook Em’!), trying new restaurants, and introducing Poppy to everything the world has to offer.
Sofya Hadley, MS BCBA is a Russia native, who grew up in the Pacific North West. She completed her Bachelors of Psychology in 2018 from Corban University, and finished her Masters of Special Education from Portland State University in 2021. Sofya has had the opportunity to work with individuals on the Autism Spectrum between the ages of 2 – 22 in a variety of settings, including the clinic setting, home based services, school based services, and telehealth. Throughout the years Sofya has held the roles of a Behavior Technician, Assistant Program Supervisor, and a Board Certified Behavior Analyst (BCBA). Most recently, Sofya has been conducting telehealth based initial treatment assessments and providing telehealth supervision for preschool and school aged children for an Applied Behavior Analysis (ABA) agency. Her years in the field have taught her the value of team based treatment and the importance of individualized approaches to the clients and their families. Sofya strongly believes in the impact of culture on the every day functioning of individuals and strives to learn and incorporate the culture of the clients and their families into their treatment. When not working, Sofya enjoys spending time with her family, traveling, and experimenting with new recipes!
Her passion for teaching children comes from working with her first autistic student and seeing tangible progress in the student’s communication. She also has dedicated her professional career to creating strategies that bring families into the therapeutic environment for children with special needs. Parent education and caregiver involvement are her passions and she believes these are the cornerstones of successful ABA programs.
Raees is a lifelong native of San Jose, CA and is currently studying statistics. Raees enjoys spending time with family, travelling, and playing sports with his friends. Raees teaches Middle Eastern History to 9 and 10 year olds and is very active in his religious youth group. Raees also enjoys playing baseball in his free time.
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