Board of Directors

Stephen MacDonald

Chief Executive Officer & Director

Stephen MacDonald is the President and Chief Executive Officer of EfficiencyOne, the not-for-profit operator of Canada’s first electricity efficiency utility, Efficiency Nova Scotia. Under Steve’s leadership, EfficiencyOne continues its track record of meeting its energy savings targets under budget, with a focus on continuous improvement, innovation, and customer satisfaction.

Nova Scotia’s results and innovative model have been cited by the influential International Energy Agency, and by the Pan Canadian Framework on Clean Growth and Climate Change. Steve has been recognized as one of Atlantic Canada’s Top 50 CEOs for 2019 and 2020 and is a recipient of Canada’s Clean50 award; both acknowledging his industry-leading efforts promoting energy efficiency and reducing C02 emissions.

Steve is a relentless champion for the development and growth of the energy efficiency industry in Nova Scotia, and the more than 2,500 people working in this field across the province. He is regularly asked to participate in national discussions on energy efficiency and climate policy. A Chartered Professional Accountant, prior to his appointment as President and Chief Executive Officer, Steve previously served as EfficiencyOne’s Chief Operating Officer and held senior leadership positions with a Nova Scotia Crown Corporation and Grant Thornton. Steve is a member and Vice Chair of the Board of Directors for the YMCA of Greater Halifax/Dartmouth and chairs the Governance Committee. He is also a member of the Advisory Committee for The ReCover Initiative, a project to develop a deep energy retrofit solution that responds to the climate crisis at the speed and scale necessary to meet our greenhouse gas reduction targets. He has been a member of the Advisory Committee of the Canadian Business for Climate Policy and the Maritimes Energy Association Nominations and Elections Committee.

Carol MacCulloch, B. Comm., M.A.

Chair of the Board

Carol MacCulloch has vast experience as a non-profit executive and director. Carol was one of the initial directors appointed when Efficiency NS Corporation was established, continuing to serve on the board of Efficiency One.  She is a founding trustee and Chair of the NS Apprentice Award Trust having  previously served as the first Board Chair of the newly established Nova Scotia Apprenticeship Agency. Her expertise has helped several start-up organizations, and her leadership has energized a series of quasi-governmental organizations, advisory committees, and non-profit boards. Carol has completed the Conference Board of Canada, Charter Director Program. Carol received an honorary diploma from the Nova Scotia Community College.

Corinne Boone, BA, MES, CDI.D


Corinne has 30 years of experience in the “business” of sustainability, focused on environment, social and governance (ESG) factors, with specific in-depth experience in climate change, carbon finance and markets and stakeholder/community engagement. She is an environmental economist, a carbon market pioneer and has worked extensively in the mining and metals, energy, and financial services sectors, internationally and domestically.  She worked, lived in, and/or travelled to, more than 50 countries.

Corinne is a Director of Efficiency One (E1), Hci3’s parent company, and also sits on the Independent Review Committee for Waratah Capital’s Alternative ESG Fund.  She is the current Board Chair of the Canadian Energy Research Institute (CERI).

Corinne is extremely passionate about key role for business in achieving sustainability and has spent much of her career demonstrating that sustainable business is simply good business.


Vicky Sharpe, BSc, PhD, ICD.D


Vicky Sharpe has served on boards for over 20 years mainly in the energy and financial arenas.  She has 35 years of diverse experience in the power, energy and natural resource sectors, has extensive investment networks, international exposure and is a seasoned director (ICD.D 2005).  She is a pioneer and innovator in the cleantech commercialization and venture capital space and is the recipient of awards that recognize this commitment.  As the founding President and CEO of Sustainable Development Technology Canada she mobilized public funds and private capital of over $5 billion for project work and commercialization for Canadian cleantech companies.  She is committed to clean capitalism, integrating ESG practices into businesses while improving competitiveness and profitability.


Julia Sable

Acting Associate Director

Julia brings a diverse array of experience in non-profit management, sustainability, communications and community engagement to HCi3. Julia worked for the Province of Nova Scotia designing and managing sustainable transportation programs, where she prioritized building networks within and between communities across the province. She previously worked for several sustainability non-profits, including most recently Ceres, where she managed and developed programs to build environmental, social and governance (ESG) competence for corporate board directors. Julia has extensive experience in multi-stakeholder management and coalition building in diverse cultural contexts in both the private and non-profit sectors. She holds a Master’s Degree in Law and Diplomacy from the Fletcher School (Tufts University) and a Graduate Diploma in Social Innovation from the University of Waterloo.