Call or Text RZT: (480) 365-9981

Now Accepting New Therapy Clients * (480) 365-9981 *

Meet the Ridge Zeller Therapy Team!

* Interested in joining our team? If so, click here to learn more about RZT employment opportunities! *

Ridge Zeller Therapy Directors

JoAnn Ridge, M.S., CCC-SLP, Co-Director, Ridge Zeller Therapy

JoAnn Ridge, M.S., CCC-SLP, is a proud ASU Sun Devil having received both her bachelor and master degrees in communication disorders from Arizona State University. Along with continuing to work in the field, JoAnn mentors both new and experienced SLPs and SLPAs on our staff and enjoys watching them learn and grow as clinicians. Her hobbies include working out, reading, and crafting, and binge watching TV programs, not necessarily in that order.

Meghan Zeller, M.S., CCC-SLP, Co-Director, Ridge Zeller Therapy

Meghan Zeller, M.S., CCC-SLP, has provided speech-language therapy in metropolitan Phoenix schools, homes, rehabilitation facilities, and hospital settings since 2001. Meghan received her master's degree from Southern Connecticut University in 2001 and her undergraduate degree from University of Massachusetts, Amherst. Meghan's sons, 10 year-old John and 8 year-old Jackson, keep Meghan and her husband, Mark, very busy. Meghan enjoys traveling, yoga, socializing with friends, and watching HGTV.


RZT Office Staff

Hilary Parker, CPA, M.Ed.Business Manager, has a bachelor’s degree in accounting and a master’s degree in education. She passed the CPA exam in 1990 and worked in both public and governmental accounting for twelve years, including serving as Director of Finance and Treasurer for the City of Farmington, New Mexico. During her career, she also taught accounting courses at the community college level, as well as junior high mathematics courses. She adores spending time with her husband and two teenage daughters and she loves Jazzercise! Hilary has worked at Ridge Zeller Therapy since its inception in 2008. “I love working with the incredible therapists and staff, as well as the wonderful clients at Ridge Zeller Therapy. That is why I enjoy my job!”


Heather Holston, Therapy Coordinator, moved to Arizona from New England in 2013 because her family “loves sunshine more than snow!” While attending college, Heather worked with special needs adults, which led to a lifelong love of working with the special needs community. Heather opened and operated a home daycare for 10 years and then became a special education paraprofessional in the elementary school setting. She has been happily married to her best friend, Jon and is the proud mother of Sarah and Jacob. She loves spending time with her beautiful family, reading at the beach, being a Jazzercise instructor, and exploring Arizona.

Marin Ridge, Administrative Assistant

RZT Therapy Providers


Jana Barrett, M.S., CCC-SLP, provides speech and language therapy in school based and clinic based settings to clients with a wide range of communication impairments including autism, specific learning disabilities, intellectual impairments, stuttering, traumatic brain injury, articulation impairments, and those who use augmentative and alternative communication. Jana’s passion is augmentative and alternative communication (AAC). Currently, she is the AAC specialist for Ridge Zeller Therapy. Her goal is to provide an accessible AAC program to each individual through awareness, staff and family trainings, technology support, and evidence-based practice.


Sarah Britto, M.S., CCC-SLP joined our team after completing the RZT speech pathology externship program. Her clinical experiences include working with culturally and linguistically diverse high school students with a variety of disabilities. She completed her graduate studies at Minot State in North Dakota in 2009. Sarah continues to grow as a professional, enjoys working with individuals who stutter, and is a mentor to new SLPs and SLPAs. Originally from Manitoba, Canada, Sarah has settled quite nicely into desert living and enjoy the Arizona sun.


Angela Bryant, M,A. Ed, School Psychologist, received her degree from Ottawa University. She earned her Bachelor of Science degree from the University of Utah in Psychology 1985. Angela is excited to be doing what she loves best:  Working with children, families, and schools to help students become successful learners. She has two adult children, Caitlin and Alex, and has proudly been married to her husband for 30 years. She is originally from Georgia and enjoys going to movies and spending time with family and friends.

Sarah (Riley) Callow M.A., CCC-SLP graduated from Wichita State University and joined our team after completing her externship with Ridge Zeller Therapy. Sarah enjoys Arizona's scenery, hiking, and our southwestern culture. Most of all, she loves trying all the great cuisine around the valley.


Rosalia Cheshier, M.A., CCC-SLP is Ridge Zeller Therapy's "app" and technology expert. She is originally from Wichita, Kansas and joined our team after completing our graduate extern program. Rosie is always willing to "go the extra mile" for students, patients, and colleagues, and she excels at organizing new and innovative speech and language activities. Rosie enjoys being outdoors, hiking the beautiful mountains of Arizona, and running in races.  

 Sarah Chilson, BA, SLPA, Ridge Zeller Therapy

Sarah Chilson, BA, SLPA graduated from Ohio State University in 2015. She loves working with students of all ages and abilities. She adores being outdoors and active, and she is an avid runner and hiker. She likes to cook and enjoys trying new recipes, as well as crafts found on Pinterest. She is new to Arizona and is delighted by the adventures she is having thus far. Prior to moving to Arizona in 2015, she lived in Ohio her entire life.


Colette Davison, M.Ed, SLPA holds a Master of Higher and Post-Secondary Education and a bachelor's degree in Speech and Hearing Science. She has worked with students of all ages from diverse backgrounds. In addition, she has experience working with English Language Learners and high school students transitioning to post-secondary living. Colette and her husband Cameron, enjoy family time with Liam, cooking, reading, snowboarding, and traveling, and she recently began a nursing program!

Nicole Erickson, SLPA, Ridge Zeller Therapy Nicole Erickson, SLPA graduated May 2012 from ASU with a bachelor’s degree in speech and hearing sciences. Since graduating, Nicole has worked as a speech-language pathology assistant in Oregon, Washington State and Arizona. She loves to hike, read fabulous books, and cook delicious vegetarian food. She is proud to have hiked Machu Picchu right after graduation. Nicole lives with her sweet pup, Lola, who adores their hiking adventures.


Mirvat Farah, B.S., SLPA was born in Chicago, but raised in Tempe, Arizona.  She graduated from Arizona State University with a self-proclaimed “passion” for speech therapy. Mirvat has experience providing Applied Behavior Analysis therapy for children with Autism, and her goal is to become a Speech-Language Pathologist. Mirvat says, “Ridge Zeller re-opened the doors for me to get back into the speech therapy world!” She describes herself as a “total foodie” who loves trying new local restaurants and says she is “at her best” when utilizing her organizational and creative skills. In addition to travel, Mirvat enjoys art and comedy shows, as well as festivals.

Nicole Flanagan, B.S., SLPA was born in Scotland, grew up in Ireland, and moved to the United States in 2007.  She earned her undergraduate degree from Northern Arizona University in May 2015, and her goal is to attend graduate school in the near future.  In her spare time, Nicole enjoys discovering new places for hiking adventures!

 Camille Frazier, Certified Occupational Therapy Assistant

Camille Frazer, COTA is a Certified Occupational Therapy Assistant who graduated from Arizona State University in 2014. She specializes in pediatric home health and sensory integration. In her spare time, Camille loves to travel, and she is fond of bike riding and swimming. Camille is proud to be a twin!

 Erin Gant, Ridge Zeller Therapy

Erin Gant, B.A., SLPA graduated from ASU with a major in Sociology and a minor in Spanish in 2002. In December 2015, after completing a speech-language internship with students, she graduated with her SLPA certification from Estrella Mountain Community College. Since then, she has worked with students with Autistic Spectrum Disorder providing academic and social support. Erin looks forward to bringing her experience with this community to increase communication proficiencies with all of her students. She is a devoted wife and mother of three incredible children, and she cherishes her family time. She loves to run and workout, and she adores curling up with a good read during any free time that comes her way..

Logann Gregg, B.S., SLPA was born and raised in Arizona. She graduated in May 2014 from Arizona State University with a bachelor degree in Speech and Hearing Science. Logann is currently finishing up a master's degree special education, but hopes to go back in the near future for a master's in Speech-Language Pathology. Logann is a huge movie buff, and she loves traveling (anywhere with a beach is her favorite), hiking, and coaching numerous Special Olympics sports team for the City of Chandler. 
Vicki Heard, Ridge Zeller Therapy Vicki Heard is a special education teacher and consultant for Ridge Zeller Therapy. She has a rich and diverse background serving students of all ages and abilities. She has a bachelor’s degree in special education from Arizona State University and two master’s degrees: a Master of Education from Northern Arizona University in Curriculum, and a Master of Education from Arizona State University in Education Leadership. Most recently in her extensive career, Vicki was the Director of Exceptional Student Services at Phoenix Union High School District. Vicki loves to jog and travel, and she is proud to be an Arizona native!

Sarah Kaesler, M.S., CCC-SLP earned her graduate degree from Northern Arizona University. Over the past 13 years, she has gained experience treating children with a variety of communication disorders, ranging from general expressive and receptive language delays to more complex disorders, such Autism, Apraxia, and extreme behavioral challenges. She has recently begun supervising SLPAs and has found the experience very rewarding. Sarah is a proud mother of four children ages 15, 13, 8 and 4 and is happily married to her husband Kyle, also an educator. Together, they enjoy making a difference every day and knowing they are changing lives.


Michelle Kvamme, M.S., OTR/L earned her master’s degree in occupational therapy from A.T. Still University School of Health Science and her bachelor's degree from Towson University in Towson, Maryland, majoring in Elementary Education. Prior to becoming an occupational therapist, Michelle worked as a 4-6th grade teacher in the Paradise Valley Unified School District in Scottsdale, Arizona. In her spare time, Michelle loves spending time with her husband and children. Her hobbies include hiking, swimming and volunteering at her children's school.


Lora Ledford, M.S., Ed, M.S., CCC-SLP recently received her second master’s degree from Northern Arizona University after working with children in the school setting for more than 10 years. She began her career as a Special Education Resource Teacher in 2002 before transitioning into the world of Speech-Language Pathology as a Speech-Language Technician in 2005. Lora was born and raised in Niagra Falls, New York and has lived in the Phoenix area since 2003. She says she is "excited to be a part of the Ridge Zeller Therapy team this year." In her free time, Lora enjoys spending as much time as possible with her growing family.

Eileen Leuthe, Ph.D., Clinical Psychologist:  

Dr. Eileen Leuthe is a Licensed Clinical Psychologist with extensive experience diagnosing and treating children with autism spectrum disorder.  Before joining Ridge Zeller Therapy, she worked at the Children’s Hospital of Colorado. As a psychologist with the Neurodevelopmental-Behavioral Pediatrics Child Development Unit, Dr. Leuthe worked with hundreds of individuals with developmental disabilities and autism spectrum disorder. She received her doctoral degree from Arizona State University in 2008 after completing an internship at the Mailman Center for Child Development at the University of Miami Miller School of Medicine. She completed a two year post-doctoral fellowship at the JFK Partners’ Autism and Developmental Disabilities Clinic at the University of Colorado. Dr. Leuthe joined Ridge Zeller Therapy after relocating to Phoenix with her husband and son. In her spare time she enjoys hiking, cooking, and outings around Phoenix with her family.

Kate Matley M.S., CCC-SLP moved to Phoenix shortly after receiving her Master's degree from Brigham Young University in 2009. She has worked in a variety of settings such as home health, schools, and rehabilitation facilities. Kate is passionate about providing caregivers with the tools and education they need to implement an effective home program. Kate enjoys reading, crossword puzzles, yoga, camping, and rock climbing.


Nadia Miller, M.S., CCC-SLP earned her master’s degree from Northeastern University. She has enjoyed working with both children and adults in medical, clinical, and school settings. In her spare time, Nadia loves spending time with her daughter and husband. Her hobbies include hiking, running, tennis, and anything that allows her to be outdoors!

Lauren Milovich, Ridge Zeller Therapy Lauren Milovich, SLPA is a proud Arizona Wildcat and an enthusiastic SLPA! She graduated from the University of Arizona with a Bachelor of Science in speech, language and hearing sciences in 2015. She then completed her clinical hours at the University of Arizona’s Children’s Clinic. She loves to run, hike and camp, and she adores reading psychological thrillers! Lauren watches Friends reruns, and she confesses “I can pretty much quote the entire show”. We’re delighted to have Lauren on the RZT Team!
Dane Nielsen, Bilingual School Psychologist, Ridge Zeller Therapy Dane Nielsen is a bilingual school psychologist. He received his bachelor’s degree from Utah State University in 2004. He obtained a Master of Education in 2008 and an Ed. S. (Education Specialist) in 2010, both from Idaho State University. He has enjoyed working in schools as a Nationally Certified School Psychologist since 2008. Dane loves sports, especially ping pong, and he loves to read.
Jeanine Nesvik, M.S., CCC-SLP received her masters degree from Northern Arizona University. In addition, she has a bachelor degree in both communication sciences and psychology. Jeanine is originally from Casper, Wyoming, and in her spare time, Jeanine trains and fosters rescue dogs. Welcome to RZT, Jeanine!
Jenny Parsons, COTA has 36 years’ experience as a Certified Occupational Therapist/Licensed. She moved from Milwaukee, Wisconsin to Arizona in 1983. Her Career experiences include school-based, mental health, hospital, geriatric, and clinic settings. Jenny and her husband Dale have two awesome sons, Alex 25 and Ben 22. She enjoys bike riding, swimming, cooking, weaving, movies and hanging out with family and friends.


Marline Pena, M.Ed., School Psychologist received her degree from Ottawa University and has been working as a bilingual school psychologist for four years. In addition, Marline was a Developmental Specialist for over seven years, working with children ages birth to three. Although she was born in New York, she was raised in the Dominican Republic, instilling a love of the beach and tropical weather. Marline also enjoys music, singing, dancing, movies, and going for walks with her nine year-old son and their dog.
Cassandra Perry, B.S., SLPA is a former gymnast from North Carolina who has a passion for inspiring children to reach their fullest potential. Her first job working with children was coaching gymnastics at age 18. Ever since, she has continued to expand her knowledge and experiences by working as a preschool teacher, behavioral (ABA) therapist, and now speech-language pathologist assistant. She is excited to further her experiences by being part of the Ridge Zeller team and also by continuing her education aat the graduate level in the future. In her spare time, Casie enjoys cooking, painting, and doing anything outdoors. 


Sheila Basler Powell, B.S. OTR/L has 27 years' experience as a registered and licensed Occupational Therapist, working both in schools and behavioral health settings. The first half of her career was spent developing programs and supervising other therapists and COTA's. She is now enjoying working part time in the school setting with a diverse caseload of special needs students. She enjoys spending time with family, traveling, music, and reading.

Erin Robertson, SLPA, Ridge Zeller Therapy Erin Robertson, SLPA found her passion for speech therapy while working in a child-life program at a pediatric hospital. She graduated with a double major from ASU in May 2016 with degrees in Speech and Hearing Sciences, and Family and Human Development. She loves to dance, hike and shop, and she does whatever she can to spoil huge chocolate Labrador Toby and her very fat cat Scotty.


Kristi Savage, M.S., CCC-SLP earned her master's degree from Minot State University. After relocating to warmer weather, she has worked in the education, medical and in-home settings. Kristi has experience treating a variety of disorders including apraxia, articulation, feeding, receptive and expressive language, and cognitive deficits, and she is a Hanen certified instructor for the It Takes Two to Talk parent program. Kristi enjoys being outdoors, "doing crafty projects around the house", and traveling to cooler weather in the summer! In addition, Kristi conducted Ridge Zeller Therapy's enrichment camp program in 2015. Thanks, Kristi!


Amanda Segura, B.S., SLPA became a speech-language pathology assistant after teaching kindergarten through fourth grade for 15 years. She and her husband, David, have three beautiful children, Noah, Isabella, and Jonah. She enjoys traveling, scrapbooking, cake decorating, and spending time with her family. Amanda's goal is to become a speech-language pathologist.

Abi Seiger, M.S., CCC-SLP graduated from NAU in 2015 with a Master of Science in Speech-Language Pathology and will complete her clinical fellowship with RZT spring semester 2016.  She has been working as an SLPA for 5 years since graduating from ASU in 2010 while completing her summers-only graduate program at NAU.  Abi’s education adventure began in New York City at the Fashion Institute of Technology, but she soon realized that speech-language therapy was her passion.  She loves knitting, crocheting and many crafts as well as swimming and yoga. If you can’t find Abi crafting or exercising, she might be pursuing her other delight, experimenting with a new recipe in the kitchen.
Courtney Sistak, M.S., CCC-SLP has enjoyed working with children of all ages and abilities for over 15 years. She graduated with her Bachelor's and Master's degrees from Arizona State University. Needless to say, she is a big Sun Devils fan! In her spare time, Courtney enjoys cooking, music, being outdoors, and spending time with her husband and two daughters. She is also a proud Girl Scouts leader, where she enjoys helping girls to provide service to their community and become the leaders of tomorrow.


Cindi Smith, OTR/L graduated from Midwestern University in Glendale, Arizona. She specializes in school-sensory, visual perception, and handwriting. Cindy enjoys "extreme backpacking", volunteering, traveling, and "living life to the fullest."


Sarah Jordan Strong, M.S., CCC-SLP works with both adults and children in the East Valley. She completed her undergraduate education at Portland State University in Oregon and her graduate degree at Arizona State University. Her primary areas of professional interest are dysphasia and neurogenic communication disorders, but she enjoys the opportunity to work with a variety of clients. In her spare time, she enjoys reading a good book, hiking, and cooking.

 Karla Tucker, SLPA

Karla Tucker, is an SLPA who received her second bachelor’s degree in communication disorders from Utah State University in 2016. She also received a TESOL certificate (Teaching English to Speakers of Other Languages) from Oxford TEFL in Prague, Czech Republic in 2013, as well as a bachelor’s degree in advertising and public relations in 2004 from Michigan State University. Karla loves studying languages, and she taught abroad for three years in Japan and South Korea. She enjoys walking daily for exercise and doing Latin ballroom dancing. Just out of college in 2004, Karla had the exciting opportunity to intern with a major league baseball team which she says was “fun but exhausting!” We are thrilled to have Karla on our team!


Candice Warner, B.S., SLPA began working for Ridge Zeller Therapy after completing her SLPA clinic hours with us. Her goal is to begin graduate school within the next two years, but isn’t sure what her specialty will be as she is interested in all aspects of the profession. Candice says, “I love working with kids! I have always worked with kids, and I plan to continue working with kids throughout my life.” Her hobbies include running, reading, and hanging out with friends and family.    


Noelle White, B.S., OTR/L has 22 years' experience as a registered and licensed occupational therapist, working in both school and behavioral health settings. She loves her job as an OT, focusing on skill building, empowering students, and enabling independence in the school setting. In addition, she has developed workshops for educators and professionals about sensory and fine motor development. Noelle enjoys spending time with her husband and two children, reading, traveling and volunteering as a parent contact for other parents of children with special needs.


Alyson Woodbury, M.S., CCC-SLP graduated in May 2012 from Arizona State University with a Master of Science in Communication Disorders. She has worked with both children and adults with a variety of disabilities. Alyson is a wife and a mother to four little girls. She enjoys Irish step dancing and spending every free moment with her family.    


* Interested in joining our team? If so, click here to learn more about RZT employment opportunities! *

Now Accepting New Therapy Clients * (480) 365-9981 *