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Siskin Children's Institute

Therapy Team

 speech therapy

Mary Hollowell, M.A., CCC-SLP


Mary is a licensed and certified speech-language pathologist. She holds a B.A. in Psychology from Western Kentucky University and an M.A. in Speech-Language Pathology from Indiana University. Mary has experience working with preschool- and school-aged children in both school and private clinic settings. As a graduate student, Mary assisted in research in the areas of phonological and articulation disorders. Mary has special interests in early language development, assessment, and treatment.  

Mallory Sliger, MS, CCC-SLP


Mallory is a certified speech-language pathologist who has experience working with both school and pre-school aged children. She received her bachelor’s degree from the University of Tennessee in Knoxville and her master’s degree from the University of South Florida in Tampa. Mallory has a special interest in augmentative and alternative communication.

 occupational therapy

Jennifer Peet OTR/L

amanda cutting

Amanda graduated from the University of Tennessee at Chattanooga with her Doctorate in Occupational Therapy in 2018. Amanda was a graduate student intern at Siskin Children’s Institute from January 2018-May 2018 and completed a sensory playground design project for the institute as a part of her doctoral student requirements. Amanda fell in love with Siskin Children’s Institute during her time here as a graduate student and wanted to come back and begin her career working alongside our phenomenal therapy team and medical providers. She was thrilled to have the opportunity to return to Siskin in September 2018 working with children and their families. She has a passion for helping children who struggle with completing important daily life tasks such as play, dressing, grooming, feeding, toileting, bathing, interacting with peers, participating in school, and participating in activities in the community due to sensory processing concerns and concerns for developmental delays. Amanda has experience with the SOS Approach to Feeding Therapy.

Jennifer Peet OTR/L

Rachel garber

Rachel has been an occupational therapist for over 20 years. She has supported the classrooms in the Siskin Early Learning Center for the last 12 years. Rachel also has experience providing home visits to the early intervention population as well as providing outpatient support. She is currently providing classroom and outpatient supports at Siskin Children's Institute. She has presented at state and local conferences in the areas of assistive technology and fine motor development and has completed the Level 1 Certification through Handwriting Without Tears.

Jennifer Peet OTR/L


Jenny received her Master’s degree in Occupational Therapy from The University of Tennessee College of Health Sciences and has been practicing in pediatrics.  She has worked in both clinic and school settings, working with children with a variety of diagnoses, including autism, cerebral palsy and cognitive impairment. Prior to returning to school to be an OT, her career centered on science education and science writing. She taught Human Anatomy and Physiology at Chattanooga State, studied animal behavior at Binghamtom University and was a writer and educator at the California Academy of Sciences.

Courtney Pittman OTR/L


Courtney Pittman graduated from the University of Tennessee at Chattanooga with a bachelor's degree in occupational therapy (2003). For over 9 years she has worked with a wide variety of diagnoses in children from infants to early teens. Courtney has a special interest in sensory processing disorder and is certified in Therapeutic Listening and Astronaut Training.

 applied behavior analysis

Courtney Pittman OTR/L

rebecca brooks, lba, bcba

Rebecca is a Board Certified Behavior Analyst and TN Licensed Behavior Analyst from Chattanooga.  She received her bachelor’s degree from Harding University and her master’s degree in Clinical Psychology from East Tennessee State University.  Rebecca has experience working with all ages, and has worked in clinic, home, and community settings.  Her passions are to help children with autism to learn functional living skills and to help families navigate their responses to challenging behaviors.

Courtney Pittman OTR/L

holly hennessey, lba, bcba

Holly has worked with children and adults with autism since 1996. She is a Board Certified Behavior Analyst and TN Licensed Behavior Analyst from Cleveland, Ohio.  Holly received her bachelor’s degree from Ohio State University and her master’s degree in special education with a focus on curriculum & instruction from Cleveland State University.  She completed her coursework in applied behavior analysis through Penn State University. Holly has provided behavior intervention services to individuals with autism spectrum disorders in clinical, community, educational and home environments. She has worked with individuals across the lifespan.  Holly is passionate about educating families and other professionals on how to effectively continue therapeutic practices in natural environments. .

Courtney Pittman OTR/L

KAYLA LENTZ, m.ED., lba, bcba

Kayla is a licensed and board certified behavior analyst. She has experience working with individuals of all ages and with a wide range of abilities but has a passion for working with children with an autism diagnosis. She received her bachelor's degree in applied behavior analysis from the University of North Texas and her master's degree from Arizona State University. Kayla especially enjoys teaching functional living skills and communication.

Courtney Pittman OTR/L


Jessica is a Board Certified Behavior Analyst. She received both her bachelor’s and master’s degrees from Auburn University. Jessica has experience working with preschool and school-aged children in home and school settings. In addition to these services she has worked in many other settings including adult services, the foster care system, and a private clinic. Jessica contributes the knowledge and expertise to teach families how to respond to challenging behaviors and teach appropriate behaviors by utilizing the principles of applied behavior analysis. 

Courtney Pittman OTR/L

Jane WHite, lba, bcba

Jane is a Board Certified Behavior Analyst and TN Licensed Behavior Analyst with over a decade of experience in the field of ABA. She holds a B.A. in Psychology from University of North Carolina Asheville and an M.A. in Applied Behavior Analysis from University of South Florida. Jane has experience working with preschool and school-age children in home, clinic, and school settings. As a graduate student, Jane conducted research in the area of verbal behavior with children with autism. She has special interests in the areas of verbal behavior and early intensive behavioral intervention.