About Us

The Achievement Center for Therapy is pleased to offer a warm, well-trained staff to help your children learn and grow in a safe, nurturing environment. We offer innovative programs and therapies servicing an extensive variety of conditions, while specializing in Speech-Language Pathology, Occupational Therapy, Pediatric Feeding Disorders, Autism, AAC, traumatic brain injury in California, Nevada, and New York. Members of our team regularly lecture nationwide on these topics, as well as special education advocacy, communication disorders, and iOS apps for communication skills. Our staff is dedicated to their craft, and look forward to working with you and your child.

Shawn Manvell


Shawn Manvell, MS, CCC-SLP, founder of the Achievement Center for Therapy, has been at the forefront of the industry for over 15 years, offering patients innovative therapies with a traditional and technological mix of treatments. She is a Pediatric Feeding Specialist, a Speech-Language Pathologist, and an iOS app developer, creating apps that complement her practice. She graduated with her Bachelor’s Degree in Speech-Language Pathology from SUNY Fredonia, and her Master’s degree in Communicative Disorders & Sciences from California State University Northridge.

Shawn has successfully provided services and therapies to infants, children, and adolescents with a variety of conditions and developmental disorders, and is sought after for consultation and public-speaking engagements in a variety of educational, medical, and community settings. She has lectured nationwide and internationally on a variety of topics including Pediatric Feeding Disorders, AAC & Children with Communication Needs, special education advocacy, and iOS apps for communication skills. She provides trainings to special education teachers, administrators, related service staff, and parents to improve feeding abilities and communication skills in children and adolescents. Her professional interests include Pediatric Feeding Therapy, Autism, AAC, processing disorders, and traumatic brain injury.

Outside of her private practice, she enjoys raising her daughter, traveling, skiing, riding and showing horses.

Lindsay Detring

General Manager & Speech Therapy Aide

Lindsay serves as our General Manager and a Speech Therapy Aide.  She received her undergraduate degree from West Chester University in Communication Science and Disorders in 2005.  She is currently taking classes and applying to graduate schools to become a Speech-Language Pathologist. Lindsay enjoys spending time with her husband and three-year-old daughter.  They love traveling, hiking, going to the beach, and relaxing at home together.

Sara Rhoads

Front Office Support Personnel

Sara works as our Front Office Support and maintains our busy schedule. Aside from working at Achievement Center for Therapy, Sara is a Licensed Makeup Artist and specializes in Bridal makeup. In her free time, she loves spending time with her husband and their three year old son, Carter, who has been coming to Achievement Center for Therapy the past year and half for Speech Therapy.

Raegan Nizdil

Administrative Support Assistant

Raegan serves as our Administrative Support Assistant. At any given moment, you can find her working beside Lindsay and Sara at the front desk, or working on one of the many fun projects and plans that ACT has in the works. She received her undergraduate degree from Harvard University in Psychology in 2017. She is currently taking classes and applying to graduate schools to become a Physician Assistant. Raegan likes to spend her free time being outdoors and active. She enjoys hanging out at the beach, skiing in the mountains, or just relaxing and spending time with friends and family.

Samantha Tan

Lead Speech-Language Pathologist

Samantha is the Lead Speech-Language Pathologist at ACT. She obtained B.A. and M.S. in Communicative Disorders and Sciences from California State University, Northridge. She completed her clinical fellowship at ACT and attained her certificate of clinical competence through ASHA in December 2018. During her clinician fellowship, Samantha focused on the specialty of pediatric feeding and swallowing under the mentorship of ACT’s founder/owner and pediatric feeding specialist Shawn Manvell. Samantha was born and raised in Southern California and is a Disneyland Annual Pass holder. She spends her free time playing soccer, refereeing youth soccer games and hanging out with her 3 dogs.

Emily Marshall Crabbe

Speech-Language Pathology Clinical Fellow

Emily Crabbe, M.S. CFY-SLP, received her Bachelor of Fine Arts degree, in Dance, from the University of the Arts in Philadelphia, PA; and received her Master of Science degree in Communicative Disorders and Sciences, Speech and Language Pathology, from California State University, Northridge, CA.  Emily has clinical experience in the treatment and diagnosis of children and adults with speech and language delays or disorders and enjoys. Emily enjoys using client centered multi-modal activities to engage clients based on their individual strengths and interests, and takes a family-centered approach to educate parents, and to encourage carry over in the home.

Brittnee Jimenez

Speech-Language Pathology Assistant

Brittnee is a Certified Speech and Language Pathology Assistant here at ACT. She attained her undergraduate degree and certification as an SLPA from California State University, Northridge. After receiving her B.A., she became certified as a Behavioral Interventionist for the Hermosa Beach School District and has worked as a nanny to children with special needs for over six years. On any given weekend, you can find her at the park with her two dogs or in the South Bay spending time with her family and friends.

Kim Settle

Occupational Therapist

Kim is our Occupational Therapist here at the Achievement Center for Therapy. She served our country in the United States Air Force for six years.  Kim continued her education after the military to receive a Master of Occupational Therapy from Loma Linda University.  Kim has been working in the area of pediatrics since 2011, focusing primarily on early intervention, handwriting, sensory integration, and hippotherapy (using the horse and its environment as a therapeutic tool). She is trained in both level I and II American Hippotherapy Association treatment principles with the horse. She enjoys spending time with her family, traveling, and almost anything outdoors!

Toni Szydlowski

Certified Occupational Therapy Assistant

Toni is one of our Occupational Therapy practitioners here at ACT. She works on improving our kiddos’ fine and gross motor skills through fun games and activities in our new OT gym. Toni grew up in Camarillo and loves living in Ventura County. She studied Child Development at Ventura College, and Occupational Therapy at Stanbridge University in Irvine, CA. When she isn’t working, Toni likes to spend her time reading, hiking, or relaxing on the beach.

Ariel Sid

Certified Occupational Therapy Assistant

Ariel is one of our Occupational Therapy practitioners here at ACT. She works on promoting independence and participation through engaging in everyday meaningful activities such as fine/gross motor as well as activities of daily living (life skills). Ariel grew up in Simi Valley and studied Child Development and Sociology at Moorpark College. She then went on to continue her education in Occupational Therapy at Community Based Education in Los Angeles. When she isn’t working, Ariel enjoys watching movies and spending quality time with her 3 year old twin sisters.