Image by Marisa Howenstine

About Us

For over a decade, Mary Plain and Ronit Rosenblum have collaborated in helping children in Toronto and the Greater Toronto Area in successfully working toward their goals. Together, Mary, a Speech-Language Pathologist, and Ronit, a Behaviour Analyst specialize in supporting individuals with a wide range of communication, developmental and learning differences. By combining their specialties, they are able to maximize the learning of the children they support.
Together they have developed Hello Speech Developmental Services - working with other professionals to help children across various areas of need, such as Speech Therapy, Diagnostic Assessments, Occupational Therapy, Behavioural Therapy, and Feeding.

Mary Plain

Founder of Hello Speech Developmental Services

Mary Plain is a Master’s level Speech-Language Pathologist and is registered with the College of Audiologists and Speech-Language Pathologists of Ontario (CASLPO). Since 2005, she has been practicing with specialties in the areas of Autism Spectrum Disorder, Motor Speech Disorders, Social-Communication challenges, Late Talkers, and Language Disorders.


Ronit Rosenblum

Founder of Hello Speech Developmental Services

Ronit Rosenblum is a Board Certified Behaviour Analyst since 2003, has had extensive training in providing evidence-based practice to children and youth with autism and related disabilities. In 2008 she received a Graduate Certificate in the Communicative Disorders Assistants Program from Durham College. In 2011, she received a Masters degree in Education where she specialized in Special Education.

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Ontario Autism Program

Our Specialists

Speech-Language Pathologists


Our Speech-Language Pathologists (SLPs) hold Master’s degrees in Speech-Language Pathology and work to prevent, assess, diagnose, and treat speech, language, and social communication challenges in children. Our SLPs work closely with our CDAs and BCBAs to optimize learning. Our SLPs are registered with the College of Audiologists and Speech-Language Pathologists of Ontario (CASLPO).

Board Certified Behaviour Analyst (BCBA)

Board Certified Behaviour Analysts (BCBAs) specialize in behaviour management as well as developing behaviour analytic interventions to help improve student learning and behaviour.  Our BCBAs work closely with our SLPs and CDAs and families to individualize treatment goals as well as identify barriers to learning. This allows us to set up the learning environment to maximize student success. 

Communicative Disorders Assistants  (CDA)

Our Communicative Disorders Assistants (CDAs) are professionals trained in Communication Disorders and hold graduate certificates. They work under the guidance and in collaboration with SLPs and BCBAs implementing individualized treatment plans, reporting on therapy outcomes, and working as a team to adjust therapy goals.

Occupational Therapists

Our Occupational Therapists  work to prevent, assess, diagnose, and treat the whole child in areas of gross motor, fine motor, sensory differences and activities of daily living such as feeding, dressing and toileting. Our OTs work closely with OTAs to optimize therapy sessions and overall day to day living. Our OTs are registered with the College of Occupational Therapists of Ontario (COTO). 

Occupational Therapy Assistants

Our Occupational Therapy Assistants (OTA) help children use their newly acquired skills in natural settings: at play, in educational settings, and in their home life. Our OTAs collaborate with our OTs  to create a unified strategy  that enables children to thrive in their natural environment.

Want to Learn More?

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Kickstart your Career with Hello Speech

We are a growing practice and we need more passionate specialists like you! 

We are currently looking for enthusiastic and professional Communicative Disorders Assistants (CDAs) in the Durham, Halton, Niagara, and Toronto to join our diverse and dedicated team of clinicians.

Both part-time and full-time positions are available.

So, if you're self-motivated and want to build an interdisciplinary practice with a supportive community of clinicians you can find current openings on or email your resume & cover letter to