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Mountain View

Nathalie Sagar, MA, Ph.D.(c)


Ms. Sagar is a senior clinical associate with six years of experience providing assessment and treatment services to children and youth. When conducting assessments, her goal is to develop an in-depth and comprehensive understanding of the child. This helps parents and teachers tailor supports to build on the child’s strengths and implement targeted strategies for areas of need. Throughout the assessment, fostering comfort and connection is her priority. She is committed to collaborating with children and parents to make the assessment process as easy and engaging as possible. 

Ms. Sagar will be registering with the College of Psychologists this coming summer. She is currently in the final stages of completing a doctorate in School and Applied Child Psychology at the University of British Columbia. In 2022-2023, she completed a pre-doctoral internship at the Sick Kids Centre for Community Mental Health. Prior to this, she worked as a certified school psychologist, consultant, and doctoral practicum student in a variety of clinical settings in British Columbia including hospitals, private practices, schools, and community-based clinics. In these settings, she conducted a wide variety of complex psychological assessments for children and youth with varying needs and abilities, including psychoeducational and social-emotional assessments. All of Ms. Sagar’s work is done in collaboration with and under the supervision of Dr. Julie Wallis.

Associates: About Me
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Lindsay Fitzsimmons, PhD CPsych


Dr. Fitzsimmons is a clinical psychologist, registered with the College of Psychologists of
Ontario. Her practice involves working with children, adolescents and their parents. Dr.
Fitzsimmons received her Master’s degree and PhD in Clinical Developmental Psychology from
York University. She has trained in public mental health settings including the Hospital for Sick
Children (SickKids), the Centre for Addiction and Mental Health (CAMH) and Holland
Bloorview Kids Rehabilitation Hospital, as well as in private practice.

Dr. Fitzsimmons’ practice is grounded in evidence-based methods. She provides psychological
treatment services to clients with a variety of concerns, including anxiety, mood, emotion
regulation and adolescent issues. She draws on cognitive-behavioural interventions, integrating
elements of motivational, client-centred and solution-focused modalities, tailoring her approach
to meet individuals’ needs. She also provides parent counselling to assist parents in supporting
their children’s social, emotional and behavioural wellbeing. Dr. Fitzsimmons fosters a
supportive, collaborative environment, making clients feel understood, respected and

Dr. Fitzsimmons also offers psycho-educational assessment services to children and adolescents,
to evaluate learning, attention, memory and executive functioning, as well as potential
behavioural and mental health needs. Psycho-educational assessment can help parents and
schools to better understand a child’s learning and behaviour, can determine if a child meets
diagnostic criteria for a condition such as a learning disability, ADHD or an intellectual
developmental disorder, and provides recommendations for the home and school environment.
Dr. Fitzsimmons also offers psycho-educational assessments to students attending French
, or enrolled in the French Immersion program.


Phone: (647) 478-9454

Associates: About Me

Alexandra Basile, PhD.


Dr. Basile (she/her) is a clinical and school psychologist registered with the College of Psychologists of Ontario. Her scope of practice includes work with children, adolescents, and their parents. Dr. Basile completed her Master of Arts and Doctor of Philosophy in Clinical Developmental Psychology at York University. Her clinical training and employment experience include work at several school boards, hospitals, and clinics including the Dufferin Peel Catholic District School Board, the Centre for Addiction and Mental Health (CAMH), Markham Stouffville Hospital, and private practice. Dr. Basile’s breadth of clinical experiences has given her exposure to many modalities of both treatment and assessment for a variety of mental health needs. Her experience in school psychology provides her with a unique perspective of the challenges that parents, and their children experience not only at home but in meeting their social, emotional, and cognitive needs within the greater context of their community. Dr. Basile takes pride in tailoring treatment to individual needs by integrating learning and cognitive profiles into the application of developmentally appropriate interventions. She strives to provide a nonjudgmental and supportive space to establish a positive therapeutic relationship with her clients. Dr. Basile works from a cognitive behavioural therapeutic (CBT) orientation and integrates a variety of evidence-based approaches to best meet client needs. 



Phone: 1(888)706-4807

Associates: About Me
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