Our Staff 

Senior Management Team

Marie Lauzier, Executive Director

Jean West, Director of Mental Health

Kim Thorn, Director of Developmental Services

Sandy McClymont, Director of Finance and Operations 

Maureen Smith, Manager of Human Resources

Carole Lynn Harley, Office Manager


Developmental Services 

Kim Thorn, Director of Developmental Services

Developmental Services Ontario Central East Region (DSO CER)

Dianne Hope, Supervisor 

Julie Graham-Thirgood, Supervisor 

Susan Van Elswyk, Supervisor 

Developmental Services

Angela Pizzolato, Senior Supervisor of DS Case Management Access and Adult Regional Services

Heather Langford, Supervisor of DS Children’s Regional Services

Nikki Truong, Supervisor of DS Children's Services

Joanne Savage, Supervisor of DS Case Management – South York

Marilyn Graham, Supervisor of DS Case Management


Mental Health 

Jean West, Director of Mental Health

Scott Belisle, Senior Supervisor for the Mental Health Program


Carrie Dinsmore, Supervisor 

Erick Roat, Supervisor 

Streamlined Access

Jeanette Rowsell, Supervisor 

Mental Health Case Management Program

Maria Cetnar, Supervisor for Central & North York Region 

Nancy Lewis, Supervisor for Flexible Supports Program


Privacy Officers

If you have a privacy concern related to your personal health information please contact our Privacy Officers, Marilyn Graham (ext. 2240) or Scott Belisle (ext. 2371) at 905.898.6455, or email them both directly at privacy@yssn.ca.


Cathy Sampaio-Lepiane, Communications Supervisor for YSSN and Developmental Services Ontario (DSO)

To contact a member of our staff, please call 905.898.6455 or 1.866.257.9776, or send your enquiry to contact@yssn.ca and it will be directed to the appropriate individual. For more contact information, please visit our Contact Us page.