About Us

At A to Z Therapy Clinic we work with children from the ages of 18 months to 18 years of age. Our model for therapy is designed for the clinician to work collaboratively with parents, teachers, and health care providers to ensure maximum success and carryover of skills and tools that can be applied in any environment. We believe that all services are a piece of a puzzle. All of those pieces must come together, in order to fully develop your child's true potential—from A to Z.

A to Z Therapy Clinic logo

Why Choose A to Z Therapy Clinic?

We're Small

The qualified and friendly therapists at A to Z Therapy Clinic will know you, your family and work with you individually to achieve your personal goals

… but we’re well connected.
In fact, you can receive Occupational Therapy (OT) and Speech Therapy (SLP) as joint sessions from A to Z Therapy Clinic. The clinicians at A to Z Therapy Clinic work closely with leading professionals from many other fields including psychologists, teachers, doctors, and many more.

We're Better

Always getting better as we’re Accredited and Certified Therapists at A to Z Therapy Clinic are highly qualified, and continually participating in professional learning and development. Accredited in the Hanen Program (It Takes Two to Talk), Lidcombe Program, Natural Language Acquisition, Reading with TLC—Lively Letters & More

You get money back.
Claim back through private insurance. A to Z therapy clinic will be happy to assist you with your insurance claims. A receipt will be provided following each session

We're Flexible

We understand that life can get busy, so we offer sessions from Sunday to Saturday in our colourful, custom-fitted private therapy clinic. We also provide the flexibility of individual or group sessions, helping to progress from mastering skills individually to using them in everyday life.

Virtual Speech Therapy is also offered.

What is Telepractice?
Telepractice consists of the use of telecommunications technology such as the internet, to provide clinical services from anywhere in Canada. Using telepractice, a speech-language pathologist can provide intervention to a child. We have experience using telepractice to provide both individual sessions and group sessions.

Our Team

Maria Picture

Maria Tsirmbas, M.A., CCC-SLP

Speech-Language Pathologist

Maria is a Speech-Language Pathologist and a good standing member of the Ordre des Orthophonistes et Audiologistes du Quebec (OOAQ) as well as the American Speech and Hearing Association (ASHA). She brings a wealth of expertise and a deep passion for helping others communicate, in English, French and Greek. Maria's goal has always been to help individuals of all ages overcome communication challenges as well as reading and writing difficulties.

Whether it is improving articulation, enhancing language skills or addressing voice concerns, she is dedicated to guiding clients on their journey to success. Maria is a Natural Language Acquisition (NLA) trained clinician. She has experience with Childhood Apraxia of Speech, Speech sound disorders, developmental language disorders as well as dyslexia. She provides one on one therapy as well group therapy, in a supportive and empowering environment while incorporating a multi-sensory approach to her sessions.

Additionally, Maria enjoys supervising students pursuing a master's degree in speech-language pathology as well as mentoring new graduates. With several years of experience in the field of speech therapy, she is committed to providing personalized, evidence-based care to each client who walks through our doors. You will see her actively moving in sessions, matching your child's energy level, and engaging in your child's special interests too!

Dr. Alessandra Picture

Dr. Alessandra Rivizzigno


Dr. Alessandra Rivizzigno is a doctoral level clinical psychologist with a broad skill set and background working with preschoolers, children, adolescents and their families. She is a member of the Ordre des psychologues du Québec and is pleased to offer professional services in both English and French. Passionate about her profession, Alessandra promotes an open, warm and non-judgmental environment with clients. Over the last decade, she has worked and trained in numerous environments such as experience The Jewish General Hospital, The Montreal Children's Hospital, and the Sir Wilfrid Laurier School Board in the greater Montreal area.

Dr. Rivizzigno has a speciality in conducting comprehensive psychological and psychoeducational assessments from the preschool to late adolescent age range. She is experienced in conducting assessments to identify Intellectual Disability, Learning Disorders (reading, writing, mathematics), Attention Difficulties, and Emotional/Behavioural disorders in order to provide families with individually tailored recommendations aimed to help their youngsters reach their utmost potential.

Juliana Picture

Juliana Carozza, M.A., CCC-SLP

Speech-Language Pathologist

Juliana has been working as a licensed speech-language pathologist since 2021. She is a member of l'Ordre des orthophonistes et audiologistes du Québec (OOAQ) and The American Speech-Language-Hearing Association (ASHA). Juliana studied at The University of Maine, where she graduated with a Master of Arts degree in Communication Sciences and Disorders.

Juliana is passionate about working with children who stutter, which led her to undergo training in the Lidcombe program. She is also trained in the Lively Letters reading program and is a Natural Language Acquisition (NLA) trained clinician for gestalt language processing (GLP). Throughout her years of experience, she has treated a variety of speech and language delays/disorders, including stuttering, literacy, augmentative and alternative communication (AAC), speech sound disorders, phonological disorders, and more.

Her expertise lies in helping children achieve their full potential, while simultaneously providing parents with the tools needed to help their children succeed.

Isabella Picture

Isabella Mazzaferro, M.H.Sc., S-LP

Speech-Language Pathologist

Isabella earned her Master's degree in Speech-Language Pathology from the University of Ottawa in 2022. Since then, she has been committed to helping children of all ages with speech-language and communication challenges, including those with speech sound disorders, language learning disorders, reading and writing disorders, autism spectrum disorder, and more. Her passion lies in building confidence in children's self-expression abilities, and she is dedicated to guiding them towards achieving their goals in a warm, welcoming, and fun environment.

She emphasizes the importance of not only providing children with effective therapy but also ensuring that they find the process engaging and supportive. Isabella provides services in both English and French and is currently trained in the Lively Letters program and in the Natural Language Acquisition framework (NLA).

Ekaterini Picture

Ekaterini Tsoraidis, M.H.Sc.

Speech-Language Pathologist

Ekaterini, known as Kat, is a dynamic and multilingual speech and language pathologist and member of the Ordre des orthophonistes et audiologistes du Québec. In June 2023, after graduating from the University of Ottawa, she joined the A to Z team to help school-aged and preschool children reach their full potential by addressing language difficulties, articulation, dyslexia and more.

Kat's experience working with children does not begin here. Before entering the speech-language pathology field, she gained experience working with children in volunteer and work settings through early childhood intervention and tutoring roles.

Kat is committed to creating tailored solutions for each child's developmental journey

Kyra Picture

Kyriakoula Kyra Sideris, M.H, Sc

Speech-Language Pathologist

Kyriakoula, also known as Kyra, is a dedicated and compassionate Speech-Language Pathologist and a registered member of the "Ordre des Orthophonistes et Audiologistes du Québec." Prior to completing her graduate studies at the University of Ottawa, Kyra volunteered at several speech therapy clinics and gained valuable experience working at a daycare facility. These diverse experiences significantly enhanced her creativity, collaborative skills, as well as her ability to effectively communicate and connect with children. Committed to individualized care, Kyra strives to develop tailored solutions that address each child's unique needs.

Furthermore, Kyra holds a certification in the Hanen It Takes Two to Talk program, equipping her with invaluable tools to support both parents and young children in their communication journey.

Sabrina Picture

Sabrina M, MSc., erg.

Occupational Therapist

Meet Sabrina, our occupational therapist! Sabrina earned her Masters of Science degree in Occupational Therapy in 2021 at Queen's University. Her journey in this field has been driven by her passion in making a positive impact on children's physical, cognitive, and emotional development. Over the past several years, she has worked with children and adolescents across various settings including summer camps and specialized schools.

Given her passion for learning and her commitment to evidence-based practice, she stays up to date in her evolving profession through participating in accredited continuing education courses. This has allowed her to become proficient in important and emerging areas such as primitive reflexes and sensory processing. She is committed to making therapy sessions child-centered and family-centered while emphasizing enjoyment and individual interests and goals.

Adriana Picture

Adriana Canzeri

Early Language Interventionist

Adriana is an Early Childhood Interventionist with over 4 years of experience who provides services and support to infants, toddlers, and their families. She holds a Master's degree in Clinical Science and a Bachelor's degree in Linguistics. Adriana is eager to pursue an additional Master's degree in Speech-Language Pathology, highlighting her dedication to continuous learning. With a compassionate, patient, and empathetic approach, she demonstrates her commitment to positive change at A to Z by creatively incorporating clients' interests during sessions.

Adriana's expertise encompasses assisting children in developing language skills, addressing articulation difficulties, enhancing social-pragmatic abilities, supporting pre-linguistic skills, and more. With unwavering dedication, adaptability, and a client-centred focus, she actively contributes to the holistic development of the children she aids, ensuring each session is innovative and tailored to their unique needs.

“Every single person that helps my child represents a puzzle piece, and it takes many pieces to complete any puzzle. Thank you for being part of them.”