East Valley 480-892-9777

West Valley 623-334-5299

Speech Therapists

Barb earned her Bachelor of Science Degree in Speech-Language Pathology in 1989 and her Master's Degree in Speech-Language Pathology in 1990 both from Illinois State University.  She has experience with both children and adults in a variety of settings.  She enjoys working with children and young adults with expressive and receptive language disorders, articulation, auditory processing disorders, cerebral palsy and down syndrome.  Barb holds a Certificate of Clinical Competence and has been a member of the American Speech-Language-Hearing Association since 1990.  

Most recently, she was a substitute teacher for grades K-8 in Colorado before moving to Mesa, AZ.  She and her husband enjoy going to their 3 kids' activities.  (Derrick at ASU, Mark at UofA, and Maddie, a student at RMHS).  Barb also enjoys taking long walks with her dog and entertaining family and friends when they come to AZ to visit.  

Barbara is a native Arizonian. She graduated from Arizona State University with a BS & MS in Speech Language Pathology and Audiology and teaching certificate (certified K-12); a Ph.D. from University of Kansas, Lawrence Kansas in Speech Language Pathology and Audiology and a Post-doctoral in Special Education from the University of Toronto in Ontario, Canada. She has Emeritus standing with the American Speech Language and hearing Association, a Certificate of Clinical Competence and has been a clinician for 45 years.

While living in Canada, she served as president of the Ontario Speech and Hearing Association and was associated with the Group Health Centre as Clinical Director of the Department of Communication Disorders and with the Sault Ste. Marie Board of Education as a consultant.

Barbara specializes in work with person diagnosed as autistic and those with cognitive disorders. She loves working with families and her caseload is generally with older children and young adults.

Barbara has duel citizenship with Canada and the U.S. and is married to a Canadian. They have three children, eight grandchildren, and 3 great-grandchildren and live in Gilbert, AZ

Beth received her Master's degree in Communication Disorders in 1993, from Arizona State University. She has been a Speech Language Pathologist for over 20 years, and has experience with both adults and children in a variety of settings. Beth has extensive experience in the area of feeding, but enjoys working with a diverse clientele. She lives in Gold Canyon with her husband and two teenage daughters, and enjoys yoga and hiking.

Cathy holds a Master of Science degree from Eastern New Mexico University and has been treating children of all ages since 1992.  She worked for several years in the public school system and in Early Childhood and Preschool programs, both home and center-based.  She also worked for several years on an Infant and Preschool Evaluation team, gaining valuable information regarding early development from multiple disciplines in the process.

Recognizing a need for practitioners in the area of Behavioral Feeding (food refusal), Cathy obtained specialized training specific to this issue in 2004 and has been practicing, with great success since.

Cristie L. O’Toole, M.S., CCC-SLP, is a speech and language pathologist for Horizon Pediatric Therapy in Mesa, AZ. Cristie has a Master of Science degree in Communication and Sciences Disorders from the MGH Instititute of Health Professions in Boston, MA, a BA in Communications and a BA in Music from Edinboro University in Edinboro, PA.

Cristie has 7 years of experience as a speech-language pathologist working with preschool and elementary-aged children as well as adults. Cristie has experience working with a wide range of clients including, but not limited to, children and adults with: mild-severe expressive and receptive language delays, articulation disorders, apraxia, phonological disorders, mild-severe pragmatic difficulties, autism, fluency, epilepsy, executive functioning disorders, auditory processing disorders, reading and writing disorders, cerebral palsy, downs syndrome, TBI, dysphasia and aphasia.

Cristie was educated at the MGH Institute of Health Professions, in a program where the relationship between spoken and written language were greatly emphasized. The institute had a state-of-the-art Literacy Center located on campus working with children and adults with communication and reading difficulties.

Before working for Horizon, Cristie worked primarily as a speech and language pathologist in the school systems of Boston and Chicago. In the school system, Cristie was able to use her knowledge of written language to work with teachers in the classroom of students who were at risk for reading difficulties. She enjoyed watching the excitement from children as finally began to read and succeed. She also used her knowledge and skills in literacy to work in a private practice in Chicago treating both children and adults.

She has also used her expertise by serving as a clinical supervisor to graduate students from local universities. Cristie believes in the importance of sharing her knowledge with clinicians new to the field.

Heidi is a Speech-Language Pathologist and Feeding Therapist who received a B.S. in Education, SLP at Baylor University and a Masters Degree in Speech and Hearing Sciences from Northwestern University. ASHA certified and practicing for over 20 years, she has worked with a diverse clientele with an emphasis on early intervention and feeding. She has been trained in the Sequential Oral Sensory Approach (SOS) to feeding, the Beckman Oral Motor program, and Chain Feeding. The mother of 3, she enjoys traveling with her husband and creating jewelry.


Jenae received her bachelor's degree in Linguistics from Brigham Young University, and she graduated with her master's degree in Speech-Language Pathology from Northwestern University in 2010.  Since graduation, her work has focused on evaluating and treating a variety of diagnoses within the pediatric population.  She completed her clinical fellowship at a multidisciplinary clinic in Chicago, and she spent several years working in the early intervention systems in both Chicago and Boston.  Jenae is the mother of two little boys, and she enjoys baking, hiking, reading, and yoga.

Jessica received a BS and MA in Speech-Language Pathology from the University of Northern Colorado. Prior to that, she completed a BS in Business Management at Colorado State University. She began her career as an SLP in 2013. Jessica enjoys working with all ages and diagnoses, but has a particular interest in fluency disorders. She completed an internship at a clinic in Denver for people who stutter in 2013 where she discovered her love and passion for working with those who stutter. When she is not spending time with her amazing clients, Jessica enjoys running, baking, and spending time with her husband and two dogs, Fiona and Penelope.

Kelly graduated from Arizona State University in 2006 with a Bachelor’s Degree in Speech and Hearing Science and again from Arizona State University in 2011 with a Master’s Degree in Communication Disorders. She currently holds a Certificate of Clinical Competence and is a member of the American Speech and Hearing Association. Kelly currently works within a public school district. Her experience includes providing speech and language therapy to children with articulation and language disorders.

Additionally, she has also worked within a self-contained Autism class targeting social skills for the past two years. Kelly enjoys spending her free time with her fiancé, family, friends, and dogs. She also enjoys baking, reading, and Zumba.


Kim Schulze has been working as a Speech-Language Pathologist since 1998.  She obtained her B.S. in Speech-Language Pathology at the University of Tulsa and her M.S. in Speech-Language Pathology at the University of North Texas.  Kim has worked in various settings throughout Texas, Nevada, and Arizona, including public schools, charter schools, private schools, home health agencies, an outpatient adult rehabilitation center, and specialized programs for children with hearing impairments and children with Down Syndrome.

Currently, Kim works in Gilbert Public Schools and contracts with Horizon Pediatric Therapy after school hours.  She specializes in working with preschool-aged children and children with autism (aged 2-18 years of age).   

Laurie received her Master’s degree in Communication Disorders in 1993, from Arizona State University.  She has been working as a speech-language pathologist for 20 years, and has experience with both adults and children.  Her specialty areas are feeding disorders, and early intervention. She is also a board certified holistic health consultant.   Laurie has been married for 22 years and has 2 teenage children.  Her passion is healthy, happy living.

Marisa has a B.S. in speech and hearing science from Arizona State University and a M.A. in speech language pathology from University of Minnesota. She has several years of experience working with children with special needs. Marisa provides speech therapy to children of all ages with a variety of diagnoses. She also has experience in feeding therapy.

Melissa graduated from Estrella Community College in 2012 as a Speech Language Pathology Assistant with Phi Theta Kappa honors.

She was introduced to rehabilitation services in 2009 when her granddaughter suffered a brain injury. So, she left her medical career of 20 plus years to pursue a career in rehabilitation and speech.

Melissa studied American Sign Language as her foreign language and has additional course work in deaf studies.

Melissa spends her free time with her husband, two sons, and three grandchildren. She enjoys movie nights, playing board games, and late night dramas on TV.

Ryan graduated from Arizona State University with a degree in Music Therapy and began working as a Board Certified Music Therapist. He obtained his certification as a Neurologic Music Therapist from Colorado State in 2009. Ryan has also completed his certification as a Speech-Language Pathology Assistant through Northern Arizona University. In addition to these roles, Ryan has been in Chinese Kenpo Karate for over a decade through the city of Tempe. He is the choir director at his church, and also gives private trumpet, piano and guitar lessons. He lives in Mesa with his wife and two children.


Sarah has been practicing as a pediatric speech-language pathologist since 1995. She completed her Bachelor's degree in Early Childhood Education at The University of Missouri-Columbia, and then received her Master's degree in Speech-Language Pathology from The University of Kansas. 

Sarah has experience treating children of all ages, with a wide variety of diagnoses. Her areas of specialty include Early Intervention and Augmentative and Alternative Communication (AAC).  She is a member of the American Speech and Hearing Association (ASHA) AAC Special Interest group. In 2010, she presented on "Implementing High-Tech AAC for Young Children with Multiple Disabilities" at The Assistive Technology Industry Association (ATIA) National Conference in Chicago, as well as at the annual International Convention for The Foundation for Microcephaly. Sarah also has a lot of experience treating children with motor speech disorders, such as Childhood Apraxia of Speech (CAS).

In 1998, Sarah relocated to Tempe, Arizona from the Kansas City area. She loves living in Arizona and does not miss the Midwestern winters! Sarah serves on the Board of Directors of the Down Syndrome Network of Arizona www.dsnetworkaz.org, and helps to lead a national photography community www.photoadvclub.com.  She enjoys being Auntie, spending time with friends & family, travel, photography & hiking.

Shannon Stillwell first attended Middlesex County College in Edison, NJ where she studied modern languages. She graduated from MCC in 1999 and began the speech language sciences program at Kean University in Union, NJ. She obtained her Bachelor's and Master's degrees from Kean in 2002 and 2004. She began working as a speech pathologist in the Warren County school district in NJ for two years. She moved to AZ in 2006 and worked one year in the Tolleson School District. At the same time, Shannon began per diem work at a small clinic and fell in love with the structure of the clinic setting. She has worked in the clinic setting since 2006. She loves the one-on-one time spent with each individual child and appreciates the constant family contact and communication the clinic provides.

After nine years of being a speech pathologist, Shannon's favorite population to work with is early intervention (children aged 1-3). She has the most experience with children with language, articulation and auditory processing delays. She has also worked with children with oral motor and feeding (sensory and behavioral based) difficulties. She also enjoys consulting with other people involved in a child's care (i.e. occupational, physical therapists, etc...) and giving recommendations and home programs to parents.

When not at work, Shannon enjoys traveling, shopping, and spending time with her husband, a physical therapy technician. They have two dogs and enjoy spending time with family and various outdoor activities.

Stephanie is a Speech-Language Pathologist and Feeding Therapist who received a B.S. in Speech and Hearing Science in 2013 and a M.S. in Communication Disorders in 2015 from Arizona State University. She enjoys working with clients of all ages and disorders but has a special interest in feeding therapy and early intervention. She enjoys playing board games, hiking, dancing and spending time with her family and friends.

Sylvia is an Arizona native, and is about to finish up a Bachelor's degree in Speech and Hearing Sciences from Arizona State University. She has been a Speech Language Pathologist Assistant for about 3 years now and loves working in the field. Sylvia is a bilingual therapist and is excited to start at Horizon to serve families who may need bilingual therapy. Sylvia is a huge Disney fan, and enjoys baking on her free time. A big part of her life is her family and loves to make the most out of everyday with the people she loves. Sylvia can't wait to be a part of the team we have here at Horizon Pediatric Therapy!

Vanessa Berrios, M.S. CCC-SLP is originally from northeast Pennsylvania. She completed her undergraduate degree in 2005 at the Univ. of New Hampshire in Communication Sciences and Disorders.Vanessa has a graduate degree was from East Stroudsburg Univ. of PA in the area of Speech Pathology in 2007. She moved to AZ after graduate school and obtained a job for a school district here. Vanessa continues to work for both the school district, Horizon Pediatric Therapy and Bright Horizon Rehab Therapy. Her areas of specialty are in phonology and language disorders.