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Chris is a Board Certified Assistant Behavior Analyst who has worked with children with Autism and other developmental disabilities since 2002. Mr. Wensil attended East Carolina University attaining a degree in Psychology with a concentration in Behavior Modification. He began his career in the field as a therapist in an ABA home based program for a child with Autism in Greenville, NC. Mr. Wensil joined The Mariposa School for Children with Autism in June of 2004. From 2004 through 2017 Mr. Wensil held positions of Instructor, Lead Instructor, and Program Coordinator for The Mariposa School for Children with Autism in Cary, North Carolina.  In October of 2017 he became the school's Executive Director.  He put an emphasis on the mission statement and relaunched the team effort of improving the quality of life for the children and the families that The Mariposa School serves.  He leads the team to help every child reach their maximum potential.

Executive Director

Chris Wensil, BA, BCaBA


Stephanie joined the Mariposa team as the business manager in 2012.  She collaborates with many sources – including families, state grantors, and insurance companies – to support the school.  With the many hats Stephanie wears from day to day, she most values being an integral part of a team that makes a difference in the lives of children and their families.

Business Manager

Stephanie Freeman


Ali is a Board Certified Behavior Analyst who received her Bachelor’s in Psychology from Appalachian State University and her Master’s in Psychology with a concentration in Applied Behavior Analysis from Florida State University. Since 1996 Ali has been a member of the North Carolina Association for Behavior Analysis (NCABA). During that time Ali has presented 12 poster presentations; 3 have won the award for best student presentation and 1 has won the award for best professional presentation with an instructor from the Mariposa School. She has been an invited presenter in a student symposium at NCABA , as well as an invited poster presentation at the Florida Association for Applied Behavior Analysis where she won the best data presentation award.  Ali started working with children diagnosed with Autism Spectrum Disorder (ASD) in 2010 and their families while in graduate school at Florida State. She taught parent training classes, worked in clinics as well as in-home with families with children diagnosed with ASD and ran sessions in a day clinic for adults with Traumatic Brain Injury. From 2011-2012 during graduate school Ali worked on researched titled "An evaluation of re-presenting the discriminative stimulus when using least-to-most prompting to teach intraverbal behavior to children with autism," which has been published in the Journal of Applied Behavior Analysis. In April of 2012 Ali graduated from Florida State University and started working with families in North Carolina here at The Mariposa School in May of 2012. From 2014-2017 Ali worked in-home with families in North Carolina. In 2015 Ali passed the exam to become a Licensed Psychological Associate (LPA) and starting supervising BCBAs while providing one-on-one services. Most recently in October of 2017 Ali was asked to come back to serve as the Clinical Director for the Mariposa School where she happily accepted and has been enjoying her time working with the Mariposa family. Ali is passionate about the quality of services we provide and is happy to spend any part of her day speaking with families and their support teams including any other professionals or family members working with Mariposa learners.

Clinical Supervisor

Ali Ivancic, MS, BCBA, LPA

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Darcie graduated from the University of North Carolina at Chapel Hill with a Bachelor of Arts in Psychology. She began working with an older population in residential services in 2004, but discovered her passion working on a home based ABA program for a child with autism. While researching ABA, she discovered The Mariposa School and became an Instructor in January of 2007. Currently, Darcie continues her work with the school as a Program Coordinator.  

Senior Program Coordinator

Darcie Rhodes, BA, BCaBA


Christy graduated from Meredith College with a Bachelor of Arts in Psychology.  While there, Christy was a part of the Meredith ABA Autism Program; a Lovaas replication practicum focusing on discrete trial training both in-home and in a clinic.  There Christy developed a love for ABA and children.  Beginning her work at The Mariposa School in 2013, Christy has worked with students age 2 - 13 in both individual and group settings.  Christy graduated with her Master of Arts degree in Applied Behavior Analysis from Ball State University and earned her credentials as a Board Certified Behavior Analyst. Upon certification, Christy continued her commitment to the Mariposa team by moving from the Master Instructor position to Program Coordinator.

Program Coordinator

Christy West, MA, BCBA

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Brittany has worked with children on the spectrum for close to 10 years. She earned her Bachelor's degree in Psychology from North Carolina State University in 2012 (Go Wolfpack!) and went on to complete her Master's in Education with foundations in ABA from the University of Cincinnati. She became a BCBA in February 2019 and is very passionate about her work.


Brittany and  and her fiancée enjoy four-wheeling together. She also likes to play with her two pit bull dogs and go camping. She is very excited to join the Mariposa team and strives to make a difference for the learners here!

Program Coordinator

Brittany Buchwald, MEd, BCBA


Stephanie has worked with children with autism and other developmental disabilities for over 18 years.  She graduated from Campbell University with a Bachelor’s degree in Psychology and earned her Master’s degree in Education in Curriculum and Instruction with an emphasis in Applied Behavior Analysis from Arizona State University.  Stephanie is excited to join the Mariposa team as a Program Coordinator.

Program Coordinator

Stephanie Blair, BA, BCaBA


Spencer earned her Master’s degree in Applied Behavior Analysis from Ball State University while serving as an instructor at Mariposa from 2011 to 2014.  She gained licensure as a special educator of the adapted curriculum and served Wake County Public Schools in the classroom from 2014 to 2018.  With her combined experience in the public school system and background in Applied Behavior Analysis, Spencer is dedicated to providing comprehensive support to the students and families of The Mariposa School.

Education and Curriculum Coordinator

Spencer Phillips, MA


Tara transferred from out-of-state to Meredith College where she graduated with a Bachelor of Arts in Psychology and Dance Studies. Having a special love for working with children, Tara was active in the Meredith Autism Program while at Meredith College. She began working at The Mariposa School in 2014. Tara is always striving to provide creative, adaptive, and integrative techniques to aid in students’ development and growth. She loves working with all her incredible students and their families.

Lead Instructor

Tara Fox, BA


After earning her Bachelor’s Degree at The State University of New York at Plattsbrgh, Jessica began working at The Mariposa School in 2015. While in school, Jessica participated in a research apprenticeship and volunteered at programs to help facilitate social skills among children with Autism. Jessica has worked with students ages 3-21 and has experience with 1:1 instruction and After School Group Program. Jessica is passionate about ABA and strives to help her students and their families.

Lead Instructor

Jessica DeGeronimo Chalmers, BA

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Lindsay graduated from NC State in 2012 with a BA in Psychology, and began working at Mariposa shortly after graduation. She began as a full time instructor at Mariposa in the spring of 2012 and earned a post-graduate minor in communication science and disorders with a concentration in articulation through ECU. During her time at Mariposa, Lindsay has taught in both one-to-one and group learning settings and across learners from age 2-15 years. Lindsay is eternally grateful for the opportunity to aid in learners’ academic, social and life skill development each day, and feels blessed to call her passion and profession one in the same.

Lead Instructor

Lindsay Whitton Noble, BA


Colette hails from Cleveland, Ohio where she worked and lived until June 2018. There, she received a Bachelor of Arts degree in Psychology from Ursuline College. She was first introduced to ABA when she was offered an internship at the Cleveland Clinic Center for Autism.  Afterwards, she continued to work and volunteer in various programs at the Cleveland Clinic Center for Autism doing outreach, in-home, and special programs. In 2018, she took her talents to Cary and began working with the lovely children at Mariposa doing what she loves most: impacting learners and their families with ABA and some TLC.

Instructor - Mentor

Colette Bauer, BA


Britni Johnson has worked as a Registered Behavior Technician at The Mariposa School for Children with Autism since July of 2018. Prior to becoming a part of the Mariposa team Britni graduated from The University of Mount Olive with a degree in Therapeutic Recreation. While achieving her degree Britni had the opportunity to work as a summer camp counselor for kids with disabilities with the City of Raleigh as well as complete an internship at Duke University Hospital as the recreational therapy intern on the oncology unit.  Upon graduation, Britni sought out Mariposa and soon became a part of the team. Since starting at Mariposa, Britni has enjoyed expanding her knowledge of ABA therapy and seeing its benefits in the children she works with. Britni is so glad to be a part of Mariposa and even more happy to get the chance to work with wonderful children and their families every day.

Instructor - Mentor

Britni Johnson, BS

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