Clinical Team

Pracitioners aligned by the greater goals of Behavior Analysis, making a difference one learning opportunity at a time.

Senior Clinical Leadership Team

Founder and Clinical Executive

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North Arrow ABA, LLC was founded by Jonathan Timm, MA, BCBA, a Licensed and Board Certified Behavior Analyst with over a decade of experience serving individuals with developmental disabilities. A Western Michigan University graduate, certified instructor in Professional Crisis Management, and previous leader in multiple ABA organizations, Jonathan brings a wealth of experience and knowledge to the table. Based in Traverse City, Michigan, Jonathan launched North Arrow ABA to provide high quality behavior analytic services to individuals with autism and other developmental disabilities throughout Northern Michigan.

Jonathan Timm, MA, BCBA, LBA

Chief Clinical Officer

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Sarah is a Board Certified Behavior Analyst, licensed in the state of Michigan with a background in special education. While she is a native Michigander, her journey in the field of ABA began in 2006 as a behavior technician in the Los Angeles Unified School District. In addition to her 8 years of experience serving children with autism spectrum disorder, Sarah also has elementary classroom teaching experience in a self-contained cross categorical setting. Sarah is passionate about the dissemination of ABA and has provided professional development trainings to educators in the state of Michigan. She is committed to making meaningful changes in the lives of the families that she supports.

Sarah spends time outside of work reading stacks of books, devouring podcasts, and enjoying beautiful northern Michigan outdoor activities such as hiking, road and trail running, and kayaking.

Sarah Rader, M.S.Ed., BCBA, LBA

Regional Clinical Director
Petoskey, Grayling, and Gaylord

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Tanya is a Licensed and Board Certified Behavior Analyst (BCBA) with over 16 years of experience in the field of ABA. Recently relocated to Michigan from Los Angeles, California, Tanya is passionate about developing and implementing socialization and generalization groups for children ages 2 to 18. She particularly enjoys working with adolescents, designing and implementing individualized programs to support their transition into adulthood, with a focus on independent living skills. Outside of work, Tanya enjoys cycling, hiking, and camping.

Tanya Vanillo, MS, BCBA, LBA 

Clinical Director
Cheboygan and Upper Peninsula

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Carrie is a Licensed and Board Certified Behavior Analyst who has been working in the field of autism and ABA since 2013. Carrie graduated from The Chicago School of Professional Psychology with a master’s degree in psychology and went on to receive her doctorate degree in applied behavior analysis in 2019. With experience ranging from behavior technician to clinical director, Carrie enjoys working with colleagues to meet common goals, helping clients reach and exceed their potential, and assisting in the education and professional development of behavior technicians and future BCBAs. Born in TX and raised in NC, Carrie has lived in the Upper Peninsula of MI since 2016 and enjoys all the outdoor beauty the U.P. has to offer. She has one son in the US Air Force, one son in the US Navy, and a daughter working as a CNA in the U.P. She enjoys hiking and enjoying nature, as well as some indoor activities like reading and putting puzzles together.

Carrie Gray, PhD, BCBA-D, LBA

Clinical Leadership team

  • Hana Call, MA, BCBA, LBA

    Clinical Director of Cedar Springs Programs

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    Hana Call is a Board Certified Behavior Analyst passionate about helping children with developmental disabilities and their families thrive through practical, ethical, and compassionate ABA services. She began working in the field in 2011 after earning her Bachelor’s degree in Psychology from Grand Valley State University and later earned her Master’s degree in Applied Behavior Analysis from Rowan University in 2013. Hana has experience across clinical, school-based, residential, and adult vocational settings and became a BCBA in 2015. After spending time living abroad in Munich and working in Tallahassee, she returned home to Michigan in 2018. In addition to her clinical work, Hana serves as an Adjunct Professor at Montcalm Community College, where she leads Registered Behavior Technician coursework. Outside of work, she enjoys trail running, strength training, spending time at Crystal Lake with her family, and adventuring around their homestead with her husband and three children.

  • Sydney Dillinger-Mewbourn, MA, BCBA, LBA

    Clinical Director of Petoskey Programs

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    Sydney is a licensed and Board Certified Behavior Analyst who has been practicing in the field of Applied Behavior Analysis since 2017. Originally from Michigan’s Upper Peninsula, she earned her Bachelor of Science in Psychology with a focus in Behavior Analysis from Northern Michigan University. She then pursued her Master of Arts in Behavior Analysis at the University of Houston–Clear Lake in Texas. Sydney is deeply committed to working alongside families to create meaningful, lasting change and enhance the quality of life for each individual she serves. She eventually returned to Michigan, settling in Petoskey to enjoy the peaceful surroundings, seasonal beauty, and lake life—while also being closer to family. Outside of work, Sydney loves spending time outdoors, traveling, and doting on her two dog.



  • Keith Finley, MA, BCBA, LBA

    Clinical Director of Grayling Programs

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    Keith is a Licensed and Board Certified Behavior Analyst who has been in the field since 2016. He received his Bachelor’s in Health Science from Saginaw Valley State University and Master’s of Arts in Applied Behavior Analysis from Ball State University. Keith was born and raised in Tawas, and shortly after finishing school moved to Northern Michigan to serve the Grayling/Gaylord communities. Outside of work, he is very passionate about the outdoors including hunting and fishing, hiking with his dog, backpacking, and camping.  

  • Emma Griffiths, MA, BCBA, LBA

    Lead Clinical Trainer

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    Emma is a Board Certified Behavior Analyst and has been working with individuals with autism since 2016. After starting as a behavior technician, Emma's passion and interest in the field of ABA quickly grew. Emma graduated from Ball State University in 2020. Throughout her experience in the field, she has had the opportunity to work in a variety of environments such as, home, school, and center-based settings. Emma is originally from Southeast Michigan, but has recently relocated to Northern Michigan. In her free time, Emma enjoys reading books, doing yoga, traveling, and spending time at Lake Michigan.

  • Brooke House, M.Ed., BCBA, LBA

    Clinical Director of Cadillac Programs

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    Brooke is a Licensed and Board Certified Behavior Analyst who began in the field back in 2017. She received her Bachelor’s in Psychology and Master’s degree in Educational Psychology from Wayne State University in the heart of Detroit, Michigan. Although she is a city gal at heart, she decided to move to Northern Michigan in 2019 and has served the community ever since. She is passionate when it comes to teaching others about applied behavior analysis, and has provided professional development opportunities for multiple school districts in Michigan. Being rooted in the Northern Michigan community, Brooke is able to help families and individuals find resources that may be otherwise overlooked. She is dedicated to helping learners and families become advocates for themselves and helping them live the most independent, least-restrictive life possible. When she is not at work you can catch her fishing, mowing the lawn, fly tying, bowling, making a mess in the kitchen, or hanging with her three fur babies. 

  • Tara Sundy, MA, BCBA, LBA

    Clinical Director of Gaylord Programs

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    Tara has been a Board Certified Behavior Analyst since 2021 and has been in the field of Applied Behavior Analysis since 2018. Tara graduated with her bachelor's in communications from Eastern Michigan University in 2017. She went on to pursue her masters in Applied Behavior Analysis from Ball State University, graduating in 2021 with a Graduate Certificate in Autism Spectrum Disorder and Graduate Certificate in Autism. Tara is originally from Northern Michigan. In 2017 Tara married her husband who is now a Veteran from the United States Marine Corps. Together they relocated to Gaylord, Michigan to raise their daughter. In her free time Tara enjoys spending time with her family, being out on the water, and watching football.


  • Aislin Woell, MA, BCBA, LBA

    Clinical Director of Traverse City Programs

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    Aislin (she/her) is a licensed and Board Certified Behavior Analyst who is passionate about working with children with developmental disabilities and their families while teaching them vital skills to gain independence as they grow. She has been working with autistic children since 2016 in home, clinical, school, and community settings. Aislin graduated from Saint Louis University and went on to gain her master's degree in Applied Behavior Analysis (ABA) with an Autism Spectrum Disorder certification from Ball State University in 2019. Originally from Chicago but a self-proclaimed Michigander at heart, Aislin moved to Michigan in 2020 to pursue leadership opportunities at an organization downstate. Traverse City living brought her to the community at North Arrow. In her free time, Aislin enjoys reading, exploring new hikes, spending time with her extended family on the beach, paddleboarding, and stealing her roommate's dog to go on long walks.

supervisory team

  • Stacy Agee, MA, BCBA, LBA

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    Stacy has been working in the field of ABA since 2018 working with children diagnosed with ASD. She joined North Arrow ABA in 2020, as its first RBT in the Cheboygan area. She moved into the Lead RBT role for a year and a half before passing her BCaBA exam and becoming a Behavior Analyst. She attended Lake Superior State University and transferred to Liberty University to finish her Bachelors in Business Administration in Healthcare Management. Stacy recently graduated with her Master’s in Practical Applied Behavior Analysis at Florida Institute of Technology.

  • Jessica Alongi, MA, BCBA, LBA

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    Jess is a Board Certified Behavior Analyst who has been working in the field of autism since 2016. Having completed her bachelor's degree in exercise science, she obtained her master's degree in Applied Behavioral Analysis and field experience from Western Michigan University. Jess grew up in Metro Detroit, and loved vacationing with her family in Northern Michigan. Inspired by her connection to the area, Jess decided to accept her position with North Arrow ABA in Traverse City in August 2021. In her free time Jess likes listening to and playing music, being outdoors with friends, and spending time with family. Jess is excited to make an impact in her kiddos lives and to help provide the support for them to reach their goals!

  • Brittany Bell, MA, BCBA, LBA

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    Brittany is a Board Certified Behavior Analyst who has been working in the field of autism since 2018. Brittany graduated from Central Michigan University with a bachelor's degree in psychology and went on to receive her master’s degree from the Florida Institute of Technology in 2022. Brittany is passionate about creating meaningful changes and improving the lives of the kiddos and young adults she serves. Brittany is a Traverse City native who enjoys kayaking, reading on the beach, and spending time with her friends and family.

  • Taylor Ketelaar, MA, BCBA, LBA

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    Taylor has been working with individuals diagnosed with ASD and other developmental diagnoses since 2016. Her passion for behavior analysis was sparked during high school courses and by her older sister, a Board Certified Behavior Analyst (BCBA). Taylor earned both her undergraduate and graduate degrees in behavior analysis from Western Michigan University, completing her masters in 2025. She has experience providing services to individuals ages 2-50, and exhibits a background working with those who have increased challenging behavior. Originally from Rockford, Michigan, Taylor enjoys spending time with her nephews and friends, and exploring the outdoors. She is excited to be part of the North Arrow team and looks forward to supporting her clients, colleagues, and technicians with their growth.

  • Megan Keyes, M.Ed., BCBA, LBA

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    Megan is a Board Certified Behavior Analyst (BCBA) who has been certified and licensed since 2021, and has worked with individuals with autism since 2010. She has experience working with individuals and their families from the ages of 3 to 17. Megan has lived in Northern Michigan all her life and enjoys the fall colors the most.  In her down time, she works fostering and finding homes for rescue dogs. Most of all, she loves cuddling with her own dog who she rescued in 2017.


  • Hannah Kratochvil, MA, BCBA, LBA

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    Hannah Kratochvil has been working with individuals with ASD and other developmental disabilities since 2018. Hannah graduated from Central Michigan University with a bachelor's degree in psychology and sociology in 2017, and went on to Ball State University to earn her master's degree in applied behavior analysis in 2022. In her free time, Hannah enjoys playing with her dogs, going on hikes, kayaking, rock hunting, and enjoying all that Northern Michigan has to offer.

  • Erin O'Connor, BCaBA, LABA

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    Erin is a Board Certified Assistant Behavior Analyst (BCaBA) who has been working in the field of ABA since 2018. She earned her bachelor's degree in Behavior Analysis from Purdue Global University and obtained her BCaBA in 2022. Erin was born and raised in Northern Michigan, but moved to Kentucky to be with her husband who was in the Army. Later, she moved again to Northern Wisconsin where she gained the majority of her experience in Behavior Analysis. She was happy to join the North Arrow team where she was able to be closer to her family in the Grayling/Gaylord area. Outside of work Erin enjoys spending time with her family and friends, camping, hiking, swimming, attending sporting or band events for her children, reading, playing video/board games, and crochet.

  • Felicia Potter, BCaBA, LABA

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    Felicia is a Board Certified Assistant Behavior Analyst who has worked with children and adolescents diagnosed with ASD and other developmental delays since 2016. Through experiences in the clinic, home, and community settings, she gained a passion for supporting individuals with acquiring or improving daily living skills and teaching alternatives to impactful behaviors. Felicia graduated from Ball State University in 2025 with a bachelor's degree in Applied Behavior Analysis, concentrating in Autism studies, and is currently pursuing a master's degree in Applied Behavior Analysis. A Tennessee native but a Michigander at heart, Felicia spends her free time crocheting, reading, and making messes with her son, daughter, and husband.

  • Pamela Quibell, Ed. Psych, PhD., BCBA, LBA

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    Pamela is a Board Certified Behavior Analyst (BCBA) with a passion for supporting children, adolescents, teens, and their families through compassionate, evidence-based care. Originally from sunny California, she brings a collaborative and adventurous spirit to both her professional and personal life. Pamela holds a Master’s degree in Forensic Psychology, a Master’s certificate in Applied Behavior Analysis, and a doctorate in Educational Psychology. In addition to providing high-quality ABA services, she enjoys teaching, conducting research, and training others in the effective application of ABA principles and techniques. Outside of work, Pamela and her husband enjoy exploring new places, embracing snowy adventures, and spending time with their delightfully fluffy cats.

  • Bridgette Steele, BCaBA, LABA

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    Bridgette holds a Bachelor of Science in Psychology from Capella University, with a concentration in Applied Behavior Analysis. Building on a diverse professional background that includes pharmacy support and caregiving for individuals with brain disorders such as Huntington's and Parkinson's diseases, she has dedicated her career to the field of autism since 2021. She is passionate about delivering empathic, trauma-informed care focusing on strategies that foster joy, connection, and communication. A long-time resident of Gaylord and a native of Northern Michigan, she embraces life in the north with her family and three busy dogs. Bridgette enjoys book collecting, home improvement projects, embracing creativity in its many forms, as well as soaking up the outdoors golfing, kayaking, or hiking.

  • Eryn Tschupp, MS, BCBA, LBA

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    Eryn is a Board Certified Behavior Analyst and is licensed in both Wisconsin and Michigan. After graduating with her BA from Western Michigan , she completed her masters degree through Purdue Global University while working as a supervisor in Wisconsin. She has returned to the Mitten after four and a half years to live out her northern Michigan dream with North Arrow ABA. With 7 years of experience in ABA she is excited to be a part of the North Arrow team. 

    When she is not at work she enjoys playing video games and board games, watercolor painting, and snuggling with her cats Nugget and Penguin. She is excited to learn more about the Petoskey area and be a part of the community.

  • Brenna Vanucci-Martin, BCaBA, LABA

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    Brenna Vanucci-Martin is a licensed and Board Certified Assistant Behavior Analyst (BCaBA). Shortly before earning her Bachelor’s in Psychology with a minor in Substance Abuse from the University of Michigan-Flint in 2022, she began working as a Registered Behavior Technician at North Arrow ABA. It was during this time that Brenna discovered her passion for the field, prompting her to pursue a Master’s in ABA to deepen her knowledge. Brenna is currently in her final semester at the Florida Institute of Technology. Outside of work, Brenna enjoys spending time camping and being outdoors with her family—though she’s not a fan of winter or the cold! She also volunteers for a nonprofit organization, assisting in addressing substance abuse through compassionate care and disseminating resources to individuals rebuilding their life.

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