Board of Directors

Colleen Cirillo, Secretary

Colleen has spent many years in the world of nature interpretation, protection and restoration, including over a decade at Toronto and Region Conservation and 2.5 years at Ontario Nature. From October 2015 to July 2020, she was director of education at the Toronto Botanical Garden. In this capacity, Colleen brought a conservation and sustainability perspective to existing programs, policies and practices. Colleen has served on many boards and committees, including the LEAF board from 2005 to 2008. She was thrilled to return in 2019.


Tenley Conway, President

Professor, Geography, Geomatics and Environment, University of Toronto, Mississauga

For over a decade, Tenley has focused on the way residents and local groups interact with the urban forest in the Toronto area to better understand urban ecosystem dynamics.  She has a BSc from Cornell University and a MSc and PhD from Rutgers University.  Tenley is also involved with the scientific and research committee of the International Society of Arboriculture (ISA) and the environmental education charity EcoSpark.  She has served on the LEAF board since 2017. 


Stuart Grant, Treasurer

Business Services Manager, Semi-retired

Stuart managed a successful small corporation in midtown Toronto and has also served with local non-profit organizations since the 1990’s. He has brought administrative and financial experience to the LEAF board, serving since 2007.


Madhu Mahadevan, Vice-President

IT Consultant

Madhu Mahadevan is an Information Technology professional specializing in Cybersecurity. Having worked in organizations such as Sun Microsystems, Oracle and most recently at Okta, he is keen to share that experience and relevant best practices with LEAF.  He has served on the board since 2008.


Darby McGrath

Research Scientist, Nursery and Landscape, Vineland Research and Innovation Centre

Darby is a Research Scientist and Program Lead at the Vineland Research and Innovation Centre.  She works with the nursery-landscape supply chain including helping improve tree establishment in challenging urban settings. She has a MES and PhD from the University of Waterloo. She is also an adjunct professor at the University of Waterloo and Brock University. Darby was extremely excited to join the LEAF board in March of 2020.


Danijela Puric-Mladenovic

Assistant Professor, Daniels Faculty of Architecture, Landscape, and Design, University of Toronto

Danijela is an Assistant professor at the Institute of Forestry and Conservation at the Daniels Faculty of Architecture, Landscape, and Design, University of Toronto. Danijela holds B.Sc. and M.Sc. in Forestry and Landscape Architecture from the University of Belgrade (Serbia) and a PhD. from the Faculty of Forestry, University of Toronto. She is a member of the Canadian Urban Forest Network (CUFN) Steering Committee and is also an adjunct professor at the University of Waterloo. Danijela's ongoing research is related to strategic, multi-purpose forest monitoring, community-based forest stewardship, and integrated spatial planning for forest conservation and restoration in settled landscapes.


Tooba Shakeel

Senior Coordinator, Sustainable Neighbourhoods at Credit Valley Conservation

Tooba is a community planner, educator and urban forester with strong roots in the environmental non-profit sector. For over a decade, she has led urban forestry, environmental education and climate action programs engaging over 70,000 people primarily from underserved communities. She is on a path to anti-oppressive learning and fostering equitable communities. She holds a MSc from University of Toronto where she published original research exploring the role of residents and community groups in urban forest management. She is an ISA Certified Arborist and an EcoDistrict Accredited Professional. She volunteers as a STEM/career mentor for young people and board member for Oakvillegreen Conservation Association. Tooba began serving on the LEAF board in 2021.