Team Members

The RBC SLC is a partnership between the College of Sustainability and a community-based team of facilitators. The RBC SLC team is also made up of current students and graduates of Dalhousie, as well as members of the local community, Dalhousie faculty and staff.


Andrew Bergel

Andrew is the Academic Lead of the RBC Sustainability Leadership Certificate on behalf of the College of Sustainability. Andrew is currently a Ph.D. candidate in Political Science at Dalhousie. As a political economist, Andrew's research focuses on environmental, social and economic change. In addition to his academic role, Andrew brings years of private sector experience with team-based and collaborative approaches to problem solving.

Sophia Horwitz


Sophia hosts processes that support generative conversations and co-creation to uncover innovative approaches for social impact. While completing her Masters in Strategic Leadership towards Sustainability she was introduced to the change-making methods and theories that she practices today.  She is a partner and co-founder of COLAB, where she has helped launch programs, projects and organizations such as Mainstreets, Art of Social Innovation, Participatory Budgeting, and Placemaking Halifax.

Gregory Woolner

GregWoolner Bio Picture

Gregory is a concerned citizen, life-long learner, and realistic idealist dedicated to tackling social and organizational challenges one step at a time through interdisciplinary collaboration, rigorous research, and complex systems approaches.  With an academic background in Sociology and Adult Education, and as a COLAB partner, he brings years of experience in process design, program evaluation, studying human systems, and project management.

Rachel Derrah

Rachel D

Rachel is a graphic recorder, facilitator, and researcher. She uses a variety of methods—from large-scale mural drawings to participatory research and evaluation—to reflect collective insights, share learning, and investigate impact. Her approach involves deep listening, personal and group awareness, and co-creation and helps people find clarity amid complexity and have challenging conversations. Her formal education is in Community Design at Dalhousie University and has continued her studies and practice in the Art of Participatory Leadership. Rachel has hosted trainings and projects in Mi’kma’ki (Atlantic Canada), Zimbabwe and across Europe.

The RBC Sustainability Leadership Certificate has received generous support from the Royal Bank of Canada. Check out the Dal News story: An Earth Day gift for tomorrow's sustainability leaders