EfficiencyOne Announces Leadership Transition and Interim President and CEO Appointment

EfficiencyOne Announces Leadership Transition and Interim President and CEO Appointment

For Immediate Release

February 9, 2026 – Halifax/Kjipuktuk, NS – The Board of Directors for EfficiencyOne, the nonprofit administrator of Efficiency Nova Scotia, today announced that Martha Casey, Chief Operating Officer, has been appointed Interim President and CEO, effective March 28, 2026, following Stephen MacDonald’s decision to step down from his role.

Stephen will remain in his position through March 27, 2026, supporting a smooth and well-planned transition before departing the organization.

The Board of Directors has initiated a standard leadership transition process, beginning with the appointment of an Interim President and CEO while a recruitment process for a permanent President and CEO gets underway.

“After 14 years with the organization, including 10 as President and CEO, I feel ready for a new professional chapter,” says Stephen MacDonald, President and CEO, EfficiencyOne. “The organization is in a strong position with an exceptional Board of Directors and leadership team. I’m confident in Martha’s leadership and look forward to supporting a smooth transition through the end of March.”

“Stephen’s leadership has had a profound impact on EfficiencyOne,” says William (Bill) Lahey, Chair of the EfficiencyOne Board of Directors. “He has guided the organization through significant growth and change, strengthened our relationships with partners and funders, and helped build the strong, capable organization we see today.”

Martha joined EfficiencyOne as Chief Operating Officer in February 2024. Previously, she served as Interim Co-President and Chief Executive Officer and Vice President, Operations and Business Transformation with the International Institute for Sustainable Development (IISD), as well as Chief Operating Officer and later Chief Executive Officer of Volta.

“Martha brings deep experience, strong organizational knowledge, and a proven track record of leadership to the role,” says Lahey. “Her appointment ensures continuity and steady leadership during a critical planning year and reflects the Board’s confidence in the strength of the organization’s internal leadership.”

“Having worked closely with Stephen for the past two years, I’ve seen the commitment and intention he’s brought to more than a decade of leadership,” says Martha Casey, Chief Operating Officer, EfficiencyOne. “I’m honoured to step into the role of Interim President and CEO at the end of March. This is a strong organization with a clear purpose, talented people, and important work ahead.”

This leadership transition reflects EfficiencyOne’s strong governance and continuity.

“This is a thoughtful and well-planned transition,” Lahey adds. “The Board has a clear and deliberate process in place, and the organization remains well positioned as we move through this next phase. We are grateful for Stephen’s leadership and look forward to working closely with Martha and the Executive Leadership Team in the months ahead.”

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For more information, contact:
Janet Tobin
Communications Manager
902-499-6494
jtobin@efficiencyns.ca

About EfficiencyOne

EfficiencyOne, operating in Nova Scotia as Efficiency Nova Scotia, has a proven track record of success in designing and delivering resource efficiency programs and services for homes, businesses, and large industrial customers. EfficiencyOne also operates two subsidiaries, The Halifax Climate Investment, Innovation and Impact (HCi3) Fund, which supports carbon reduction initiatives through a combination of investments, grants, partnerships and capacity building and EfficiencyOne Services which extend our expertise in energy management, consulting, and service delivery. To date, EfficiencyOne is saving Nova Scotians $5.6 billion in energy savings, including $628 million for low-income homeowners and renters, and avoiding the release of 12.7 megatonnes of greenhouse gas emissions. Learn more at efficiencyone.ca.