Our Staff

Lisa Kohler

Executive Director

Office: 905-815-6185 ext. 1
Cell: 905-399-1332

Lisa Kohler is the Executive Director of the Halton Environmental Network (HEN). A Climate Realty Leader and community engager discussing climate challenges, strategies, mitigation and adaptation. Ms. Kohler serves on Halton Region’s Natural Heritage Advisory Committee, Halton Equity and Diversity Roundtable and The Halton District School Board’s Environmental Management Team. 

Ms. Kohler earned her degree in Environmental Policy and Analysis from Bowling Green State University (Ohio). She started her career in the late 90ties working in the environmental not for profit sector in the United States. 

She is the orchestrator of the Halton Climate Collective a dedicated team driving local climate change. She oversees successful programs, Halton Green Screens, Greening Sacred Spaces Halton-Peel Chapter, the HEN Ambassador Program, The Oakville Resiliency Hub. Ms. Kohler networks with numerous organizations, municipalities and community members to inspire environmental change and action.


Heather Govender

Program Director, Halton Green Screens

Office: 905-815-6185 ext. 3
​Cell: 905-808-8586​

Heather graduated from the University of Toronto in 2018 with a PhD in Cell & Systems Biology, and Collaborative Program in Environmental Studies. She is an Ontario Certified Teacher and a passionate environmentalist both personally and professionally. Heather strives to live her life as close to zero waste as possible, and shares her waste reduction tips and tricks with family, friends, and the public through means ranging from casual conversations, to educational workshops, to formal presentations. Anyone who participates in her waste reduction workshops or presentations can expect to learn how their personal "garbage footprints" relate to over-consumption of the earth's resources, our growing problem of ocean plastics, and climate change. Heather has run the Halton Green Screens program and much of the educational programming for HEN since 2015.


Teresa Ierullo

Greening Sacred Spaces Project Manager

Office: 905-815-6185 ext. 2
Cell: 905-299-0733

Teresa Ierullo (pronounced you-rule-oh) has more than 15 years’ experience working in the not-for-profit sector, specifically project management and program development for internationally-trained professionals, newcomers, job seekers, adult education, women in skilled trades, and more. She created the first co-op program for internationally-trained professionals in the GTA, managed the start-up of four employment resource centres in Halton region, and assisted a collaborative group of agencies to develop a service to assist adults with different abilities secure meaningful employment. A few years ago, Teresa studied Horticultural Science at Humber College “just for fun” and fell in love with having dirty hands. Over the past year, she has committed herself to making more eco-friendly changes in her life and household, starting with the goal of a zero-waste kitchen (resulting in lots of yummy home-made bread)! Greening Sacred Spaces is a chance for Teresa to combine her project management skills with her love of gardening, nature, and a commitment to do better.

Mary Scopino

Greening Sacred Spaces Community Facilitator

Office: 905-815-6185 x. 2

Mary Scopino has been an educator for over ten years, working for the Halton catholic school board and multicultural newcomer centres throughout Halton.  During the past five years, she has enjoyed building a curriculum based on natural, purposeful and interactive hands on learning while educating students on different initiatives such as how important bees are for our environment and incorporating outdoor classrooms learning activities with recyclable materials. She has always been passionate on helping and building a greater community and integrating multiculturalism.  The years of working with newcomer families and their children have allowed her to become aware of the importance of our environment and the impact to our community.  Mary enjoys the outdoors and can communicate in both English and Arabic.

Andrea Rowe

Greening Sacred Spaces, Garden Facilitator


After leaving the corporate world in 2005 to raise her two boys, Andrea rekindled an appreciation for nature from her childhood. She joined the Halton Environmental Network in their Greening Sacred Spaces program. As the Garden Facilitator, she helps Faith Based Organizations reduce their environmental impact through greening initiatives. Recent projects have included implementing school gardens at elementary and secondary schools, consulting on kindergarten playground rejuvenations, and assisting social organizations support their clients through garden based initiatives.

Katrine Handley-Derry

Network Animator


Katrine Handley-Derry graduated from the University of Toronto with a master’s in environmental science, following undergraduate studies in Ecology and Film. Her passion is exploring how film can change people’s perceptions. Many of her experiences have involved engaging with the public in a number of ways: from being a Camp Director at Harbourfront, planning workshops to teach digital arts, to being part of the television show Daily Planet, bringing daily science programming to TV to spark the interest of children and adults alike. For the past 3 years, Katrine has worked for the Toronto International Film Festival on their Canada 150 project and then again in their Industry Services Department. At TIFF, she managed high demand periods, while striving to maintain excellent customer service. Katrine produces promotional videos and promotion material. With her passion for engaging audiences, she traveled and lived abroad, developing my language skills in both French and Spanish. Outside of her academic and professional career, she is a landscape painter.