Our Board of Directors


Peter Wynnyczuk, Executive Director

Janani Sivarajah

Peter W.

Peter has been involved in Urban Forestry for over 30 years at the municipal level and is the previous president of the Ontario Shade Tree Council (now the OUFC!). He has also been supportive of Arborist-related committees and activities. Peter is the retired urban forest supervisor with the Town of Richmond Hill.

Janani is an urban forest and plant photobiology researcher, educator and consultant. As an interdisciplinary researcher and a Ph.D. candidate, her dissertation evaluates the environmental services of urban trees with respect to human well-being. Her focus lies on UV protection and mediation of ultraviolet exposure and skin cancer risks by trees in urban environments, at the Thomas & Smith Lab, Faculty of Forestry, University of Toronto.  She also teaches an undergraduate course, Conservation of Canada’s Forests at the University of Toronto. Janani is an active member of the Toronto Cancer Prevention Coalition, Shade Policy Steering Committee, and is engaged with various community groups.

 Jackie Hamilton

John Barker

Jackie Hamilton photo

Jackie is a Registered Professional Forester (RPF), an ISA certified arborist and a graduate of the Master of Forest Conservation program at the University of Toronto. Jackie has a background in environmental science and forest management and is a Research Analyst with Toronto and Region Conservation. 

John is currently an Urban Forest Health Specialist at BioForest, where his focus is on forest health and invasive species monitoring, i-Tree studies, and urban forestry consulting. He is an ISA Certified Arborist with TRAQ and Oak Wilt qualifications, and a Certified Butternut Health Assessor. He is a graduate of the Master of Forest Conservation program at the University of Toronto and has a background in botany, urban forestry, and social science. John has previously worked for the Elora Environment Centre, the Department of Natural History at the Royal Ontario Museum, and the Toronto and Region Conservation Authority.

Barbara Yaroski

 Justin Gaudon

DSC_3291_2_2Barb brings a horticultural perspective to the OUFC from her background as a Garden Centre Sales & Production Manager and as Project Estimator of Wetland and Upland Restoration Projects.  

Justin’s PhD research is on North American natural enemy populations, primarily parasitoids, that have the potential to slow the spread and population growth of emerald ash borer. He has studied abiotic and biotic factors that affect the dispersal of a woodwasp that attacks pine trees. He is interested in forest health and entomology, urban forestry, parasitoids, invasive species, and biological control.

Sadia Butt

Sadia Butt is a Ph.D. candidate at the Faculty of Forestry at the University of Toronto, Canada. Her research focuses on the role of resident groups in urban forest governance. She has worked in urban forestry for the last 25 years as a practitioner, in forest ecology; as a researcher, investigating community engagement; and as a volunteer raising urban forest awareness through environmental education. She is also a co-editor of the book “Urban Forests, Trees and Greenspaces: A Political Ecology Approach”.

Our Advisors

Jack Radecki, Previous Executive Director from 2000-2013, Toni Ellis,  Brenlee Robinson, Bohdan Kowalyk, Peter Dmytrasz, Fran Moscall, Adrina Bardekjian, Barb Boysen, Guy Brassard, Marshall Buchanan, Andy Kenney, Teresa Matamoros, David Pearl, Michael Rosen, Richard Ubbens, Philip van Wassenaer, Marc Willoughby, Shelley Vescio & James Steenberg, David Hunt, Barb Heidenreich.