TIFFANY MITCHELL

TIFFANY MITCHELL Executive Director, BCBA Tiffany graduated from the University of Illinois at Chicago with a Bachelor of Science degree in Applied Psychology. She has worked as a behavioral therapist for 6.5 years providing in-home ABA services to young children with autism. What she enjoys most about her job are the immediate rewards of watching young children grow and thrive within their natural environments; “I enjoy being able to observe the direct results of ABA implementation and team effort. I’ve witnessed firsthand how it can positively change the lives of children and their families, and it’s so inspiring to be
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TIFFANY CZOCHARA

TIFFANY CZOCHARA Team Lead, Registered Behavior Technician Tiffany earned her Bachelor of Science in Speech and Hearing Science from the University of Illinois Urbana-Champaign and her Master’s degree in Communication Sciences and Disorders from Elmhurst College. She has almost three years of experience working with children with autism as a Registered Behavior Technician and also works as a speech-language pathologist in a middle school. She loves working with children with special needs and being able to witness each client’s strengths and progress in therapy. She enjoys getting to know children and their families and is dedicated to providing services that
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SHANNON COLLINS

SHANNON COLLINS Team Manager, RBT Shannon graduated from Western Illinois University with a Bachelor of Science in Psychology, and a minor in Sociology. She has 3 years experience as an RBT providing in-home therapy to her clients. Shannon has always enjoyed working with children; helping them to develop their skills and improve their quality of life. Shannon’s dedication to the program does not stop after work hours. She is always thinking of new ways to help her clients thrive. “I am grateful that these children are a part of my life. It is amazing to see how far my clients
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NINA KOEHLER

NINA KOEHLER Vice President, BCBA Nina Koehler received her Bachelor of Arts degree in Applied Behavioral Science, as well as her Master of Arts in Psychology from National Louis University. Nina also has a certificate in Applied Behavior Analysis. Nina is very passionate about working with children with Autism and has over 7 years experience treating children in a variety of settings. Nina has a brother with Down Syndrome and Autism. “I searched for a long time to find the most effective form of treatment for my brother. I wish I knew then what I know now.” Nina is dedicated
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NICOLE MICELI

NICOLE MICELI Training and Development, RBT Nicole attended Northern Illinois University where she received her Bachelors of Science in Kinesiology and a minor in Dance Performance. She was introduced to ABA therapy during her internship at a pediatric clinic in 2016. Nicole has always enjoyed working with children and found her passion working in the ABA field. Nicole is looking to further her education in ABA in the near future. Nicole attended Northern Illinois University where she received her Bachelors of Science in Kinesiology and a minor in Dance Performance. She was introduced to ABA therapy during her internship at
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NICHOLE MUELLER

NICHOLE MUELLER Clinical Director, BCBA Nichole graduated with her Bachelor of Science in Special Education from Northern Illinois University in 2011. She has taught children with multiple disabilities including Autism, Developmental Disabilities, Down Syndrome, and Intellectual Impairments for seven years. After several years of teaching, Nichole found herself interested in the functions of behaviors which led her to obtain her master’s degree in Applied Behavior Analysis from Trinity Christian College in 2017. She earned her BCBA later that year and has been conducting in-home therapy since. “I have always wanted to work with children since I was kid, now that
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JOSEPH MITCHELL

JOSEPH MITCHELL President, BCBA Joseph Mitchell is a Board Certified Behavior Analyst (BCBA) and Program Director for Applied Behavioral Consulting. His 13 years of experience in the field as a line therapist, team leader, and program writer give him a unique experience that allows him to successfully direct children’s programs in the most effective and efficient ways. Joseph Mitchell is a Board Certified Behavior Analyst (BCBA) and Program Director for Applied Behavioral Consulting. His 13 years of experience in the field as a line therapist, team leader, and program writer give him a unique experience that allows him to successfully
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JOELLE RAPPELT

JOELLE RAPPELT Team Manager, RBT Joelle is currently pursuing her master’s degree in applied behavior analysis at National Louis University. After earning her bachelor’s in speech and hearing science from the University of Illinois in 2019, Joelle began working at ABC as a behavior technician where she instantly fell in love with watching her learners grow and acquire new skills. Joelle is looking forward to her future career as a BCBA to improve the lives of her clients and their families. Joelle is currently pursuing her master’s degree in applied behavior analysis at National Louis University. After earning her bachelor’s
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JAMIE KOVALCIK

JAMIE KOVALCIK Managing Director Jamie earned both her Bachelor of Arts degree in Psychology and a Master’s degree in Health Science at Governors State University. Jamie earned her Master of Science degree in Psychology with a concentration in Applied Behavior Analysis from Capella University. She has over five years of experience working with children and adults with special needs. “My favorite part about working with children is being able to watch them laugh, play, and really enjoy therapy time.” Jamie enjoys teaching children new skills that will help shape them for a lifetime. Jamie always strives to help make a
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JACK KELDERHOUSE

JACK KELDERHOUSE IT and Operations Manager Jack Kelderhouse earned his Bachelors in Computer Studies from Saint Xavier University. He has ten years of experience providing technical support for nonprofit organizations, educational institutions, and medical facilities that specialize in serving the youth. He finds great meaning in supporting educational environments through implementing technology solutions that facilitate and streamline learning and is proud to contribute in this capacity to the mission of ABC and in improving the lives of the children we serve. Jack Kelderhouse earned his Bachelors in Computer Studies from Saint Xavier University. He has ten years of experience providing
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