Our Staff

Stephanie Bush

Deputy Director of Halton Environmental Network

Stephanie rediscovered her passion for the environment and gained a new understanding of climate change during a period of study and self-reflection. With two young children and climate change concerns increasing, Stephanie left her career as a Social Worker to dedicate herself to taking action on climate with the goal of inspiring and guiding others to do the same. In 2019, she joined the Halton Environmental Network as the Program Manager for Greening Sacred Spaces – Halton-Peel.  As the current Deputy Director of HEN, Stephanie hopes to bring a social justice and equity lens to the issues of climate change and looks forward to engaging more people in the conversation.

Katrine Handley-Derry

Marketing Manager and Generation Green Program Coordinator

Katrine is the Marketing Manager for Halton Environmental Network (HEN) and Program Coordinator for Generation Green,- a program designed by youth for youth with the goal of reducing greenhouse gas emissions in the Halton community. Katrine has been working for HEN since summer of 2018. Before joining HEN she had many experiences engaging with the community in a number of ways from event coordination, social media management and website development. She has worked on stakeholder engagement and partnership development for: the television show Daily Planet and at the Toronto International Film Festival on their Canada 150 project and Industry Services Department coordinating events and developing partnerships within Canada and beyond.

Katrine Handley-Derry graduated from the University of Toronto with a Master’s of Environmental Science, following undergraduate studies in Ecology & Evolutionary Biology and Film. With her passion for engaging audiences, she travelled and lived abroad, developing my language skills in both French and Spanish. Outside of her academic and professional career, she is a landscape painter.

Sundus Hussain

GHG Inventory developer

Sundus Hussain graduated from Imperial College London, the UK, with a degree in Applied Biosciences and Biotechnology following an undergraduate degree in Biology. She is passionate about environmental issues and the use of science and technology to tackle these challenges. She is excited to be working with Halton Environmental Network on greenhouse gas emissions inventory for the Halton community. She hopes this inventory will help shape new initiatives and bring awareness about GHG emissions within the Halton community. In her spare time, Sundus enjoys crocheting.

Lisa Kohler

Executive Director

Lisa’s career in the environmental not-for-profit sector spans more than twenty years in the U.S. and Canada. Lisa has a degree in environmental policy and analysis and certification as an Accredited Partnership Broker. With a demonstrated history of working in the non-profit organization management industry. With internationally-recognized leadership for inspiring climate change initiatives, Ms Kohler has an influential role in Halton. She is the orchestrator of the Halton Climate Collective, a dedicated team of leaders focused on advancing local action. In addition to engaging the community in climate mitigation and adaptation strategies, she champions successful HEN programs including Generation Green, Halton Food, Halton Green Screens, Oakville Ready, and Greening Sacred Spaces Halton-Peel Chapter. Lisa is skilled in collective facilitation, transitioning innovation and developing inter-relational strategies integrating climate action, environmental sustainability and the green economy. 

Ms. Kohler serves as Secretary on the Green Communities Canada National Board of Directors, Chair of the Halton Region’s Natural Heritage Advisory Committee, Board Member of Future Energy Oakville. Lisa also serves as a member of: The Community Energy Taskforce for the Town of Oakville, City of Burlington’s Climate Action Committee, The Low Carbon Transition Steering Committee and the Climate Change Resilience Steering Committee for the Town of Halton Hills, the co-ordinating committee of the Halton Equity and Diversity Roundtable, and the Halton District School Board’s Environmental Management Team. For the last three years Ms Kohler has enjoyed being a member of the City of Toronto’s Urban Forestry Grant Review Panel. Lisa is also the Climate Reality Regional Organizer for the GTHA West.

Jaynie Purcell

Manager of Volunteer Services and Administration

Jaynie Purcell graduated from the University of Guelph Humber with a Degree in Media and Communications and a Diploma in Public Relations. As a proud member of the Beaver Lake Cree Nation, Jaynie has a passion for protecting and preserving the environment in honour of our ancestors and on behalf of future generations. At Halton Environmental Network, Jaynie is stepping into the role of Manager of Volunteer Services and Administration. With industry experience coordinating and engaging volunteers and a background in the Non-Profit sector, Jaynie welcomes this opportunity to combine her experiences and passion for the environment. She is excited to create rich and meaningful opportunities for volunteers in the Halton Community. In her spare time, Jaynie enjoys camping, hiking, running, snowboarding and volunteering within the Halton community.

Andrea Rowe

Director, Sustainable Environments


After leaving the corporate world to raise her two boys, Andrea rekindled an appreciation for nature from her childhood. In 2017, she joined the Halton Environmental Network in the Greening Sacred Spaces program, helping Faith Based Organizations reduce their environmental impact through greening initiatives. Additionally, as the Program Manager for Halton Food, HEN's newest program, she also supports community gardens and garden-based education throughout Halton Region. Recent projects have included implementing gardens at elementary and secondary schools, supporting food gardens and programming in Community Housing neighbourhoods, establishing Canoe Gardens and other pollinator gardens, and supporting social organizations' clients through garden based initiatives.  Andrea now also facilitates "Depave Paradise" projects throughout Halton, removing asphalt and pavement to create new pollinator gardens.