Our Team

Clinical Leadership

Clinical Psychologist

Dr. Richard Sohn, PsyD
Dr. Sohn is a licensed Clinical Psychologist and graduate from the California School of Professional Psychology. Dr. Sohn is involved with the development of community involvement in mental health programs related to severe psychiatric and developmental disorders. He has experience in conducting cognitive behavior therapy for mood, anxiety, psychotic disorders for all age populations including the application of applied behavior analysis programs for individuals with developmental disabilities. Furthermore, Dr. Sohn provides comprehensive assessment reports for behavioral and psychological interventions, educational rights advocacy, and court-ordered treatment. Presently, in addition to working with our Footprints team, Dr. Sohn serves as the president of the Korean American Psychological Association.

Clinical Supervisors

Kimberly Alberty,  MS, BCBA
Kim is a Board Certified Behavior Analyst. She received her masters degree in counseling, marriage and family therapy. Kim began working with children on the autism spectrum in 2005 as an inclusion preschool teacher. In 2009 she started working in directly in the field of ABA, beginning as therapist, moving on to a program assistant, and program supervisor. She has worked in various settings including schools, homes and communities. Kim has a passion for early intervention, she has experience working with children as young as 18months all the way to adults.

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Jessica Barkley, M.Ed., BCBA
Jessica joined our Footprints Team in 2014.  She has completed her Masters in Education in special education from the University of Washington. Jessica is a Board Certified Behavior Analyst, with extensive knowledge in PECs, Proloquo2go for the iPad, and planning and using interventions relying on reinforcers and motivation to decrease maladaptive behaviors.  Presently, she supports our teams and families as a Clinical Supervisor and Consultant working with children and parents by using the their natural environment to take advantage of learning opportunities.  She also finds deep fulfillment in empowering  our Footprints families by equipping them with behavioral strategies to improve their quality of life and to make a positive and lasting impact.

2015 Jennifer Bishop Photo IDJennifer Bishop, MA, BCBA
Jennifer Bishop is a Board Certified Behavior Analyst who has worked with children for more than 9 years. She received her Master of Arts degree in Special Education with an emphasis in Autism from California State University Los Angeles. Through her graduate program she has published research in the area of Autism and later presented a poster presentation at the Association for Behavior Analysis International Autism Conference in 2015. In addition, her undergraduate work gave her a strong foundation in the field of Speech & Language Pathology where she became interested in working with English Language Learners. As a Footprints Clinical Supervisor and Consultant, she is dedicated to overseeing comprehensive ABA treatment models, intensifying functional communication and equipping families with ongoing support and training.

Danielle Bustamante, MA, BCBA

Danielle Busamante, MA, BCBA
Danielle studied education at San Diego State University and went on to pursue her Masters in special education with an emphasis on autism. After working in the public school setting primarily with individuals with mild to moderate disabilities, she served students with autism and other communication, language, social and behavioral disorders within a nonpublic school. During her time at this setting, Danielle was trained in and implemented DTT, incidental and naturalistic teaching, verbal behavior, functional communication training, and PECS. Danielle was also responsible for assisting with functional assessments and developing behavior intervention plans. After becoming a Board Certified Behavior Analyst, she joined the Footprints team in 2014. Danielle is committed to providing effective and evidence based interventions to families in order to see growth and development. Additionally, Danielle works closely with staff members to facilitate advancement using ABA principles. She strives for individual successes and values collaboration with staff and families alike to make these successes achievable.

Joanna Cabrales, MA, BCBAJoanna Cabrales, MA, BCBA
Joanna Cabrales received her undergraduate degree in psychology from California State University, Long Beach. After working in the field for 3 years, she decided to advance in the field by pursuing a Master’s degree to become Board Certified Behavior Analysis from National University. Her experience began in 2008 when she worked with children under 3 as an early intervention therapist in their homes. Over the course of her career, she has been trained in DTT, PRT and PECS, verbal behavior, joint attention, theory of mind, and symbolic play in both the home based and school setting. She enjoys working with the early interventions clients and is committed in helping them reach their fullest potential.  Joanna joined Footprints in 2013 as a clinical supervisor providing support to family and staff to help our children achieve their goals.

Yesenia Cano, MA, BCBA

Yesenia earned her B.A. in Psychology with a minor in French at Northern Illinois University in Dekalb, IL. She completed her M.A. in Clinical Psychology with a specialization in Applied Behavior Analysis at The Chicago School of Professional Psychology in Chicago, IL and became a BCBA in January of 2011. Yesenia began working with children with autism and other developmental disorders in 2008 and has loved it ever since! She has provided behavioral services, in English and Spanish, to over 250 individuals (1 to 22 years of age) and their families in the home, school, out-patient, and private, clinic setting. Yesenia is currently pursuing her Ph.D. in ABA at The Chicago School of Professional Psychology. She lives in Orange County and is a Clinical Supervisor at Footprints Behavioral Interventions. Yesenia’s goal is to help as many children develop and increase appropriate skills and decrease maladaptive behaviors utilizing efficient, effective, evidence-based Applied Behavior Analysis practices while at the same time empowering their parents and caregivers to do the same.

VCoe Employee Profile PicVictoria Coe, MA, BCBA
Victoria earned an undergraduate degree in Family and Human Services from The University of Oregon. Through a variety of internships in the mental health field, she discovered her love of supporting and caring for children and families. She has been doing just that since 2006. Upon completing her undergraduate degree, she became a direct care treatment team supervisor of a psychiatric day treatment program with Trillium Family Services in Portland, OR. She first discovered her affinity for the principals of Applied Behavior Analysis when Trillium Family Services and Footprints began collaborating to provide more comprehensive services for children and adolescents affected by autism. She saw first hand how effective Applied Behavior Analysis was at improving socially significant behaviors and functional communication in these youth. She desired to further her experience in the field of Applied Behavior Analysis and officially joined our Footprints team in 2014. She has since been awarded a Master’s Degree in Human Behavior with an emphasis in Applied Behavior Analysis from National University. Victoria finds great joy in collaborating with families and other specialists in the field to help individuals with autism achieve their goals. Her greatest reward is seeing each family’s confidence grow as they develop new skillsets to navigate all that life has to offer.

Thang Do, MA, BCBAThang Do, MA, BCBA
Thang is a Board Certified Behavior Analyst and has worked in the field of applied behavior analysis as a consultant and supervisor for more than 13 years. Thang has been trained in ABA techniques including DTT, PRT, and PECS. Previously, he worked as a behavioral consultant for Pyramid Autism School and is a certified Picture Exchange Communication Consultant as well as an accredited Pro-Act trainer. Thang is also completing his doctoral thesis in which he examines strategies to optimize staff retention and motivation to promote quality therapy services in the field of behavior analysis.

Megan Groenhof, MA, BCBAMegan Groenhof, MA, BCBA
Megan earned her Master’s Degree in Behavior Analysis at Western Michigan University and studied under the tutelage of  Dr. Richard W. Malott. In addition, she has presented poster presentations at both regional and local conferences related to her behavior analytic graduate research. After serving as a Senior Manager in WMU’s Behavior Analysis Training System, she joined our team in 2013 as a Board Certified Behavior Analyst. She is compassionate, dedicated, and possesses a keen understanding of autism and related disorders. Possessing over 5 years of experience in the field of applied behavior analysis in both clinical, community, and home based settings, Megan presently contributes to our Social Skills Program as a development committee member. Additionally, as Clinical Supervisor, she provides direct staff training and mentorship to Footprints Behavioral Technicians while monitoring client progress and promoting skill acquisition through the use of ABA techniques. Her goal is to improve the quality of life for individuals diagnosed with autism and related disorder through the use of effective, evidence-based treatment.

Kristi Hansen, MA, BCBA
Kristi earned her undergraduate degree in Psychology from Biola University with the intent to work with children with disabilities and their families. She discovered the world of Applied Behavior Analysis and her love for the science when she joined the Footprints team in 2014. Kristi worked with our teams in Orange County and San Diego before relocating to Portland, Oregon to join our Northwest team. In 2017 she earned her Master’s Degree in Teaching with an emphasis in ABA from National University and became a Board Certified Behavior Analyst later the same year. Witnessing the little victories and small steps of growth in the children with whom she works excites and motivates Kristi to strive to provide the highest possible quality of services to the child and family.

2015-08-30 23.20.23Chrystal Honsaker, MEd, BCBA, PA-LBS
Chrystal is Board Certified Behavior Analyst and a Pennsylvania Licensed Behavioral Specialist.  She received her Masters Degree (MEd) in Youth and Family Education from The Pennsylvania State University.  While there, her research focused on community inclusion and the benefits of service dogs for children diagnosed with autism spectrum disorders. She has approximately 12 years of experience in the field of ABA, serving at various levels (Therapeutic Staff Support, Mobile Therapist, Behavioral Specialist Consultant), in the home, community, and school setting. Chrystal was most recently a County Coordinator and Clinical Administrator for a Behavioral Health Rehabilitation Services provider in Southwestern Pennsylvania.  In addition, Chrystal has a strong interest in international consultation and spent 6 weeks volunteering at an Autism Center in Uganda, Africa.  While there, she completed FBAs and worked closely with staff to educate them on the implementation of various ABA treatment strategies.

FullSizeRender-2Meghan Johns, M.Ed., BCBA
Since 2000, Meghan has been teaching and working with children. Her teaching experience extends beyond Applied Behavior Analysis to include working with children and youth as an English Teacher in Thailand as well as coaching sports such as snowboarding and tennis. In 2010, Meghan began her work with children and adults with developmental and intellectual  differences in both home and community settings and decided to move back to her native state of Oregon in 2013 to further expand her knowledge and experience in the field. She went on in 2014 to complete her Master’s degree in Education with an emphasis on ABA and became a Board Certified Behavior Analyst in 2015. Now, as part of our Footprints Team, she seeks to pursue her love of ABA to nurture the growth and development of children and their families.  Meghan is actively involved in ORABA (Oregon Association of Behavior Analysis) where she enjoys learning more about ABA in multiple contexts and her ABA training includes various techniques including DTT, PECs, VB, FCT and naturalistic teaching. Meghan’s professional passion is to help individuals with disabilities engage in extracurricular activities. In her free time, you can find Meghan being active outdoors climbing, hiking, SUP-ing, working on her latest art project, or traveling the world.

Joel Kang, MA, BCBA
Joel joined our Footprints team in 2013. With a degree from the University of California, San Diego in Cognitive Neuroscience, a Masters in Human Behavior with an emphasis in Applied Behavior Analysis, and a Board Certification from the Behavior Analyst Certification Board. Joel is deeply committed to serving families and children with Autism and related disorders. His drive is to spread the knowledge and application of the evidence-based treatment strategies of Applied Behavior Analysis and to teach our families to also be experts on the field. Joel presently consults and supervises Footprints’ individualized ABA home, community, and school based programs.

Shannon Leinert, Ph.D., BCaBA
Shannon graduated with her Ph.D. in Special Education from the University of Missouri. She is also a graduate from the University of Missouri’s Leadership Education in Neurodevelopmental and Related Disabilities (LEND) program where she became ADOS certified. Currently, she is a Board Certified Assistant Behavior Analyst. Her clinical experience began in 2010 as a behavior therapist working in Early Intensive Behavioral Intervention (EIBI) programs. She has worked with individuals from 2 to 32 years of age with a variety of developmental disabilities. Shannon’s interests include developing and assessing the efficacy of social skill and behavioral intervention program for individuals on the autism spectrum. She is especially passionate about improving the social and behavioral outcomes of adults with autism spectrum disorders. Shannon worked as a researcher at the University of Oregon where she specialized in family-centered care for young children with developmental delays. She also worked as a researcher at San Diego State University where she coached teachers on various school-based evidence-based practices for youth and adolescents on the autism spectrum. She presently serves as adjunct instructor at both Point Loma Nazarene University and San Diego State University.

Tran Luu, MA, BCBATran Luu, MA, BCBA
Tran Luu joined our Footprints team in 2009. As a University of California, Davis graduate in Psychology and Board Certified Behavior Analyst, Tran is committed to serving families and children with Autism and related disorders through providing evidence-based treatment strategies as well as parent consultation and training. In addition, she provides Behavior Management Workshops for Vietnamese families to help empower and increasing their understanding of the effectiveness of Applied Behavior Analysis.  As a Clinical Supervisor, Tran provides direct oversight and training to our intervention teams and serves as a training mentor for incoming staff.


2016 Tawana McNairTawana McNair, MA, BCBA
Tawana McNair joined our Footprints Behavioral Interventions team in 2016. She has worked extensively with children and young adults with disabilities in multiple settings since 2013.  While completing her undergraduate studies at the State University of New York at Cortland she worked as an intern volunteer with adolescents diagnosed with emotional behavior disorders. Soon after she obtained her Masters of Arts in Applied Behavioral Analysis from Teachers College at Columbia University, with a New York State Teacher’s certification in Special Education and General Education. While in her masters program, she was a student researcher at the Fred S. Keller School, Yonkers, NY studying and developing techniques to improve verbal behavior in toddlers with developmental delays. In addition, she continued to work with children with disabilities, and provided families with the strategies necessary to develop a strong foundation between the two. Tawana relocated to Southern California to join the Footprints family in its commitment to improving quality of life for individuals across home, school, and community based settings. Her mission is to ensure that children diagnosed with autism and related disorders are achieving their goals using an evidenced-based approach.

2014 Gina McTaggart Photo IDGina McTaggart, MA, BCBA
From preserving the integrity of the elderly, fostering independence in teenagers, to fueling curiosity in toddlers, Gina’s commitment to helping others grow and learn has been the driving force behind her life’s passion. Teaching. As a Board Certified Behavior Analyst with her Master’s of Arts in Teaching with an emphasis in Applied Behavior Analysis from National University, Gina provides her clients and the teams that she supports with the direction, leadership, and guidance necessary to ensure that her clients continue making strides towards goals and objectives. Trained in DTT, PRT, and PECS, Gina is skilled in the application of applied behavior analytic principles and enjoys participating in Footprints OC Playgroups as a play partner to foster community integration and inclusion of our children with special needs.

 Juliana Menchaca, MA, BCBAJuliana Menchaca, MA, BCBA
Juliana Menchaca graduated with a Bachelor in Science in Psychology and Social Behavior with a minor in Education, at the University of Irvine and earned her Master’s in Human Behavior with an emphasis on Applied Behavior Analysis from National University. As a Clinical Supervisor and Behavior Consultant, Juliana Menchaca has worked with our children and families with Autism and related disorders for over 7 years. Prior to joining our team, Juliana worked in both afterschool and preschool programs in which she gained much experience running both small and large group activities to facilitate positive social interaction with children of varying needs. She is skilled in the application and teaching of ABA strategies including: toileting trainings, DTT, PECS, and PRT.  She is one of the contributors of the Footprints Parent Consultant Training Manual and continues to educate Spanish speaking families throughout Orange County as a workshop presenter. She is passionate about helping her clients and their families achieve success and feels that it truly an honor to learn from the children she serves as well as to have the opportunity to be a part of their lives.

Quynh Nguyen, PhD, BCBA-DDr. Quynh Nguyen, PhD, BCBA-D
Dr. Quynh Nguyen studied under the direction of Dr. Ivar Lovaas as an undergraduate from the University of Los Angeles. As a doctorate in Education and a Board Certified Behavior Analyst, Dr. Quynh’s expertise focuses on behavioral assessment and intervention, treatment planning, and individual therapy for children with autism and related disorders. Her hands on, goal-oriented, and strategic approach to building a strong team of behavior analysts and therapists paved the way for Footprints to become a Spotlight Award Recipient for Behavioral Services for excellence in therapy and consumer outcomes through the Regional Center of Orange County in 2008. She is also committed to excellence in education, professional ethics, and research in the field of applied behavior analysis and presently serves as an adjunct professor at National University.

2015 Sheila Oco Photo ID

Sheila Oco, MA, BCBA
From a very young age Sheila has desired to work with children of all ages. Her career goal was to work with under privileged at risk children and young adults, especially those who have been diagnosed with behavioral and or emotional disabilities. Sheila received her BA in Psychology from California State University Long Beach, and hold’s a Masters in Arts in Human Behavior from National University, with an emphasis in Applied Behavioral Analysis.  Sheila has worked in this field for nearly 8 years, and has devoted her self to assisting each child and their families in order to ensure quality of life in each individual.  As a clinical supervisor she understands that training, mentoring, and collaborating with other team members is vital in order to implement ABA strategies effectively. As it is our goal to ensure that each child meet specific social, play, independent living, and communication goals or skills. In turn they are able to be independent appropriately within society. As a parent consultant Sheila work’s hand in hand with parents applying ABA strategies for their children to maintain the well being and longevity of their children to be appropriately independent within society. Sheila finds deep fulfillment in providing each family with the skills and strategies in order to improve, and maintain the quality of life their family members.

Lillian Phan, MS, BCBALillian Phan, MS, BCBA
Lillian studied with Dr. Ivar Lovaas both as an undergraduate and therapist at the Lovaas Institute prior to joining our team at Footprints. She is a Board Certified Behavior Analyst and as a UCLA graduate with over 15 years of experience in the field of Autism and Applied Behavior Analysis, she contributes to the development of our staff training programs, ensures the quality of services and support provided by our Program Supervisors and Behavioral Technicians with the single goal of enhancing the quality of life for all individuals with autism and related disorders. In addition, she serves as an Adjunct Professor at National University in their Applied Behavior Analyst certificate program.

MSandwell Bio PhotoMelissa Sandwell, MA, BCBA
Melissa is a Board Certified Behavior Analyst who joined the Footprints team in 2013. She received her Master of Arts degree in Human Behavior from National University and a Graduate Certificate in Applied Behavior Analysis from Clemson University. Melissa is very passionate about working with children that have been diagnosed with Autism Spectrum Disorder and other behavioral disorders. Increasing quality of life for the children that she works with is of great importance to her. Over the course of her career she has become highly qualified in implementing many ABA techniques including DTT, PRT, PECS, and NET. Verbal Behavior has become one of Melissa’s many strengths. Verbal Behavior was the focus of her Masters Degree integrative project and she has had the opportunity to work directly alongside many highly qualified speech pathologists. Melissa has experience working in the public school, community, and home based settings. Her patience, compassion, and knowledge of ABA contributes greatly to the success of all the children that she works with.

img_2399Andrew Torres, MA, BCBA
Andrew received his Bachelor’s degree in Psychology from the University of Hawaii at Manoa and his Master’s degree in Human Behavior from National University, with a Graduate Certificate in Applied Behavior Analysis. Andrew was trained at the Institute for Childhood Development at Binghamton University in upstate New York, where he developed a passion for working with children with autism. Andrew has extensive training in DTT, FCT, and PCT, and he believes firmly in the importance of early childhood intervention, an area in which he specializes. He has been working in the field for over 5 years, and has been a part of the Footprints team since 2013, working with children in the home, school, and community settings. Andrew strives to continue learning and improving his knowledge in the field to better service the children and families with whom he works.

Eva Urena, MA, BCBA
Eva is a Board Certified Behavior Analyst and has worked in the field of behavioral therapy for since 1998. Eva provides parent training and education courses in both English and Spanish by leading parent education courses throughout Southern California. Eva is highly skilled in the application of ABA techniques including DTT, PRT, and PECS. She is dedicated to helping individuals with Autism and their families reach their full potential.

Julie van der Genugten, MS, BCBA
Julie has been implementing the powerful principles of applied behavior analysis to her work with children and adolescents from all walks of life since 2006. She brings energy, enthusiasm, and sincere love to her clients as she is committed to empowering children with autism to live a full life. She began her journey as an undergraduate earning her BA in Child Psychology from Hollins University in Roanoke, VA while working as a behavior therapist for children with autism. She went on to earn her MS in Autism and ABA from The Sage Colleges while gaining extensive experience working with youth in group homes and clinical settings as well as in the child’s natural environment where she applied a holistic approach to ABA. As a Board Certified Behavior Analyst and Clinical Supervisor here at Footprints, Julie is committed to fostering teamwork and excellence in ABA. Furthermore, she is passionate about building positive and healthy relationships with her clients to equip both children and their families to be active participants in shaping the direction of their lives.

Mary Than, MA, BCBAMary Ann Yee, MA, BCBA
Mary Than is a Board Certified Behavior Analyst with a Masters in Human Behavior from National University and has always known that she wanted to work with children and make a difference in their lives.  Throughout her undergraduate years at Cal State Fullerton,  she held internship positions in the field of PT, OT and Speech as she sought to determine which career path would provide her with the opportunity and skills to make the greatest impact in the lives of the children and families she would encounter.  After hearing about the field of ABA through a fellow colleague, she joined our Footprints team in 2007. Presently, she supports our teams and families as a Clinical Supervisor and Consultant working with children and parents by using the their natural environment to take advantage of learning opportunities.  She also finds deep fulfillment in empowering  our Footprints families by equipping them with behavioral strategies to improve their quality of life and to make a positive and lasting impact.

Program Supervisors

Keith Cosgrove, MS
Keith graduated with a bachelors degree of science in Psychology with a minor in art. He earned his master’s degree in education specializing in ABA from Endicott University. Keith has been working with people with autism for a little over 2 and a half years and has worked with all ages from 3 to 30 years of age. He has worked in residential, school, and home settings. Keith’s passion is learning. Working in this field, he gets to learn every day and apply what he learns to help others. He has had great opportunities to work with students on verbal behavior, DTT, activities of daily life, toilet training, PECS, and social goals just to name a few. He will be attaining his BCBA in approximately one year and from there go on to work in the field as a clinical supervisor.


Kelsey Granada, MA
Kelsey earned her undergraduate degree from the University of California, Irvine in Public Health Policy, Psychology and Social Behavior in 2013.  She completed an internship at the Blind Children’s Learning Center and realized a passion for helping children with disabilities reach their full potential. Kelsey joined the Footprints team in 2013 and fell in love with the field. She furthered her education and received her Master of Arts degree in Human Behavior with an emphasis on Applied Behavior Analysis. Kelsey is a Registered Behavioral Technician that is experienced in ABA techniques such as DTT, PECS, PRT, toilet training, and naturalistic approaches and presently pursuing her board certification in the field of Applied Behavior Analysis. She finds great joy and fulfillment in empowering families with behavioral strategies to continually improve quality of life.

IMG_2008-4Christina Griffie, MA
Christina joined the Footprints team in 2013. She received her undergraduate degree from California State University Dominguez Hills. After being with the team for a little over a year, Christina was curious to know more about ABA. So she decided to go back to school and received her Master’s degree at National University with a Master’s of Art in Human Behavior, with an emphasis on Applied Behavior Analysis. Christina is currently pursing her BCBA. She has had extensive training in DTT, PECS, PRT, and is skilled in keeping a naturalistic response. She is very compassionate and enjoys helping her clients reach their highest potential. She is very happy knowing that she is able to provide help to her clients and their families in their home and in the community. Christina believes that a little patience can go a long way when working with children with Autism Spectrum Disorders

Kimberly Lim, MA
In 2010, Kimberly began her first job involving child development, where she worked as a recreational aide at an elementary school.  After helping a child who was diagnosed with autism and their parents for the first time, her curiosity grew into genuine passion and motivation to help others whose lives have been touched by Autism Spectrum Disorder and related disorders.  Later on, she started to work in a hospital setting to gain more experience and knowledge about the field.  There, she encountered variety of individuals and worked therapeutically with each person to assist them with their wants and needs.  This experience only further strengthened Kimberly’s passion in the field.  In 2013 Kimberly received her degree from California Sate University of Long Beach in Family Consumer Science, specializing in Child Development and Family Studies and joined the Footprints team.  She decided to advance her studies and eventually earned her Masters of Arts in Human Behavior with an emphasis in Applied Behavior Analysis from National University in 2016.  

Nakisa Nabily, MANakisa Nabily, MA
For nearly 13 years, Nakisa has devoted her education and career path to teaching and working with children of all ages and abilities. She holds a Master of Arts in Human Behavior with an emphasis in Applied Behavior Analysis from National University and is a candidate to obtain her board certification as a behavior analyst.  In 2006, she joined our Footprints team and has served as a behavioral technician and parent consultant skilled at making learning creative, active, and fun!  Over the years, Nakisa has continued to grow in her vital role here at Footprints by sharing with both clients and colleagues her effervescent joy of teaching fueled by her passion to see our clients and families reach their fullest potential.  Presently, Nakisa serves as a Footprints Case Supervisor and is committed to training, mentoring, and inspiring her teams to implement state of the art ABA technology while embracing a child and family centered approach to promoting skill acquisition and behavior change.

Tracey Nguyen, MA
Tracey has been a member of the Footprints family since 2007 and she has worked in the field since 2004.  With almost 15-years of experience, she worked with children with disabilities by developing their skill sets in order to improve their daily lives; trained parents and staff members with the fundamentals of Applied Behavioral Analysis; supervised team members for their growth and career development; and collaborated on programs suitable for families and their children.  Tracey graduated from University of California, Irvine, with a bachelors of arts in Social Sciences.  After graduating college, she found herself working as a one-on-one behavioral therapist for children with autism because she wanted a career where she was able to provide special attention to her students’ learning deficits and needs.  Fulfillment came with teaching students in areas where they began to thrive and found their own successes.  Aside from having profound experience and a strong foundation in behavioral intervention, Tracey’s passion is child psychology and she furthered her education with a masters of arts in Psychology from California Southern University.  Currently, Tracey is moving towards acquiring her BCBA in the upcoming year

FullSizeRenderCeline Tran, MA
Celine received her undergraduate degree at the University of California, Riverside. In addition, she earned her Masters degree in Exceptional Student Education with an emphasis in Applied Behavior Analysis at the University of West Florida. Celine has been in the field for over 5 years and possess great clinical experiences with DTT, PRT, PECS. Celine is immensely passionate about working with children with Autism Spectrum Disorders and their families to reach their full potential.

Jennifer Vu, MA
Jennifer Vu received her Bachelor’s Degree in Psychology from the University of California, Irvine. In 2012, she began working in the field as an Early Childhood Interventionist. After discovering her passion to support children and their families, Jennifer went on to pursue and earn her Master’s Degree in Teaching, with a specialization in ABA from National University in 2016. Working closely with kids and helping them achieve their goals is what Jennifer enjoys the most. Building relationships with her kiddos, discovering the different ways that they learn, and supporting them in their endeavors is what makes Jennifer passionate about this field. She has been trained in DTT, PECs, PRT, and FCT and has fulfilled roles as a direct 1:1 technician as well as a parent consultant.

aimee5Aimee Woolcock, MA
Beginning her work with children in 2007, Aimee has worked in the school, athletic, and ABA environments with kiddos of all different ages and abilities. Her love for the field inspired her to complete her Bachelors in Sociology at The University of California, Irvine and later her Masters in Human Behavior with an emphasis in Applied BehaviorAnalysis and is currently pursuing her board certification as a behavior analyst. Since joining the Footprints team in 2014, Aimee has received extensive training in DTT, PECS and PRT. She takes these skills and implements them in a naturalistic way with our clients. Aimee enjoys working in both the home and clinic settings supporting our kiddos and their families in reaching their goals.

Clinical Consultants

Occupational Therapists

Bernadette Lafaele, MS, OTR/LBernadette Lafaele, MS, OTR/L
Since 1997, Bernadette has been dedicated to serving individuals with autism and their families. She received her Master’s of Science in Occupational Therapy from Columbia University and currently holds an active license as an Occupational Therapist in both the states of California and Hawaii. Her professional journey has provided her with opportunities to serve in both the hospital and clinical settings in America Samoa, New York, Hawaii, and now our headquarters in Southern California. As a parent of a two-year old boy recently diagnosed with Autism Spectrum Disorders, Bernadette has both a professional and personal commitment to helping children reach their fullest potential by sharing her knowledge and expertise with our families.


Speech and Language Pathologist

Ken Koseki Jr., MS, CCC-SLP, LLC
Ken Koseki received his Bachelor of Science from California Lutheran University in 2002. He then earned his Master of Science in Speech and Language Pathology from the University of Hawaii at Manoa in 2005. During his graduate school years he worked as an autism skills trainer. Ken’s practice focuses primarily on supporting children with developmental disabilities and provides speech, language, voice, and feeding/swallowing therapy. Over the years he has worked with an array of children as young as 3 months of age. Ken is PROMPT® (Prompts for Restructuring Oral Muscular Phonetic Targets) trained and frequently works with individuals with apraxia of speech. He is skilled with providing/conducting speech and language evaluations and consultation. In addition, as a part of our Footprints team, creates and carries out individual treatment plans while collaborating with our team of specialists to ensure each child’s programming is optimized for learning and development.

Rossirene Li, MA, CCC-SLP
Rossirene has been serving children with autism and their families since 2001.  She has worked with multiple behavioral agencies from 2001-2011.  She has been part of the Footprints team since its inception in 2005 as a behavioral therapist, parent consultant, and program supervisor.  She obtained her bachelor’s degree in Biological Sciences at University of California Irvine and later earned her Masters of Arts in Communicative Disorders at the California State University of Fullerton.  She currently works as a bilingual, certified, and licensed Speech Language Pathologist in a local school district.  She has conducted evaluations and provided therapy in the clinical setting and school district setting.  She has evaluated and treated patients/students in Early Intervention and general education and special day classrooms (preschool-6th) with: hearing impairments; Autism Spectrum Disorder (ASD); developmental disorders (e.g., Down’s Syndrome, Cerebral Palsy); language disabilities; Attention Deficit Hyperactivity Disorder (ADHD); specific learning disabilities; articulation disorders; fluency; and cleft palate.  Rossirene aims to help bridge the gap between behavior and communication.  Her passion is to facilitate growth in speech and language skills of ALL children by employing developmentally appropriate interventions and evidenced-based practices within highly interactive and encouraging environments.  Her aim is to also empower parents and all team members involved so that through collaborative efforts progress is propelled and achieved for ALL children in need

Executive Leadership

Director of Administration & Human Resources

IMG_6031 (1)Kristine Carillo, MBA
Kristine holds her Master’s Degree in Business Administration with an emphasis in Accounting and Management. Her extensive experience in the field of business administration spans nearly two decades. As a Payroll Specialist at PayChex Inc. she managed corporate accounts for major corporations in the US. She then devoted several years to Ceridian Corporation, a leading global business services company as an Account Manager. Through her work at Ceridian, she helped organizations control costs, save time, optimize their workforce, grow revenue, and minimize financial risk. Her commitment to ensuring accuracy and productivity lead her to Ingram Micro Inc., a Fortune 100 company and the world’s largest technology distributor for marketing, sales, and IT. As a Senior Accountant, Kristine developed both the knowledge and experience in the world of technology, accounting, and management. In 2011, Kristine joined our Footprints team to direct our administrative and human resources department to cultivate a high performance culture by recruiting, training and leading employees towards our values-based and socially-minded careers here at Footprints.

Director of Outreach Programs & Clinical Coordinator

Julia Nguyen-Kim, MAJulia Nguyen, MA
Julia has extensive experience related to social skills programming and development of higher order thinking skills in children with High-Functioning Autism and Asperger’s Syndrome. As an autism specialist for over 17 years, she has lectured at UCIrvine in graduate level courses as well as at local and national parent workshops and professional conferences on the principles of ABA and autism treatment strategies. Julia’s current work here at Footprints Behavioral Interventions focuses on the development of innovative programs and outcomes research. In addition, Julia coordinates Footprints Behavioral Interventions outreach programs which are designed to encourage volunteerism among employees. Our mission is to promote autism awareness and to support local charities dedicated to improving the quality of life for children and families with special needs.


Clinical Directors

Chang Choe, MA, BCBAChang Choe, MA, BCBA
As a University of California Los Angeles graduate, Chang Choe’s studies emphasized sociology and applied developmental psychology. In addition, he earned his Master of Arts degree in Teaching from National University and presently consults and supervises Footprints’ individualized ABA home, community, and school based programs. Prior to joining our Footprints team in 2006, Chang served as a teacher at UCLA’s Early Care and Education Center. He was responsible for maintaining the center’s quality programming as well as assisting with curriculum development and planning.  As a seasoned and skilled behavior therapist serving children and families affected by autism spectrum disorders for over 13 years, he continues to contribute to the empowerment and education of individuals in our Korean speaking community by providing parent training workshops throughout Orange County.

2014 Corey Stump Photo ID Small

Corey Stump, MA, BCBA
Corey joined our Footprints Team in 2010 after completing her Bachelors degree in Behavioral Psychology from Arizona State University and her Masters in Teaching and Applied Behavior Analysis from National University. As a Clinical Director, Corey oversees our Teams in Oregon and Washington. She holds training workshops for our newest team members as well as offering training to mental health professionals and school staff in the Oregon communities. Corey came to Footprints with a sincere love for working with individuals with developmental disabilities as she has a long history of volunteering for Special Olympics, working as a swim coach for Adaptive Aquatics, as well as having a special needs family member. Recently, Corey has taken on the role of serving as an advocate at the State level as a member of the Rules Advisory Committee for the Behavior Analyst Regulatory Board and is serving as the Mental Health Representative for the Oregon Commission on Autism Spectrum Disorder.


Director of Business Development & Contracting

Christopher Kim, MAChristopher Kim, MA
Christopher has worked with children diagnosed with autism and related disorders since 1998. He earned his BA in Child Development from Cal State LA and his main area of expertise is built upon his work with high-functioning children and teens through providing direct 1:1 intervention and through leading social skills groups. In addition, Chris holds a Master’s Degree in Human Behavior with an emphasis in Applied Behavior Analysis which lends to his ability to lead our Footprints team by adopting a servant leadership model. As the Director of Business Development & Contracting, his present endeavors include expanding Footprints’ collaboration with public and private funding sources to ensure that families are able to secure the proper level of support and coverage needed for the implementation of quality evidence-based applied behavior analytic treatment.

Medical Advisory Board

Dr. Huy Phan, M.D.
Dr. Phan is a graduate of Chicago Medical School and practices family medicine. As our on staff consultant, Dr. Phan’s expertise and medical knowledge bridges the gap between behavioral and biomedical sciences to ensure that programming and interventions are designed to optimize child development and health.

2014 Lin Connor Photo IDLin Connor, LPN
Mrs. Lin Connor is a Licensed Practical Nurse with over 20 years of nursing experience providing extensive patient care coordination and patient education.  Since graduating with her nursing degree from Atlantic County, Lin has established herself as a liaison between the patient, their insurance company and other medical professionals.  She has mastered the skill of navigating the complex requirements of insurance companies while coordinating benefits and maintaining patient confidentiality. Lin displays a great passion for working with and advocating for individuals with developmental and intellectual disabilities. She has joined Footprints Behavioral Interventions as our patient care coordinator becoming one of the first lines of communication between our patients and our team.

Legal Advisor

Max Nuyen, Esq.
Attorney Max Nuyen received his law degree from Boston College and his undergraduate degree from the University of California at Berkeley, where he graduated with honors. Since the beginning of his legal career in 1998, Max Nuyen has championed the legal rights of individuals and families. Mr. Nuyen served as a Captain in the Marine Corps as a judge advocate; helped to establish a free legal clinic for military members for immigration-related matters and was awarded the Navy-Marine Corps Achievement Medal and the Navy Commendation Medal for his contributions to the Marine Corps legal community. These are the highest personal non-combat awards which may be awarded to an officer of his rank.

Early in his career, Mr. Nuyen developed a passion for helping those whose legal rights are at risk. Following his military service, he continued as a successful trial attorney advocating for the rights of individuals against entrenched institutions such as insurance companies. Mr. Nuyen presently focuses his attention on serving our community of individuals and families with special needs. As Footprints Behavioral Intervention’s legal advisor, Mr. Nuyen channels his passion for justice and uses his extensive legal experience to ensure that the special needs community receives the highest quality legal representation.