
Carolyn Calwell
Carolyn Calwell plays a pivotal part in the OEB’s transformation into a modern, future-focused regulator and ensures the OEB carries out its work expertly and deliberately. In 2021, Ms. Calwell was appointed to her role as Chief Corporate Services Officer and General Counsel. Building on a career spanning the private sector and the public service, she excels in building communication and consensus between the two.
Ms. Calwell was appointed interim Chief Executive Officer in June 2025.
Having served in senior leadership roles in law and policy at Ontario’s Ministry of Energy, most recently as Assistant Deputy Minister, Ms. Calwell brings deep energy sector expertise to her role at the OEB. Prior to joining the public service, Ms. Calwell worked at a large law firm in Toronto.
She earned an Honours Bachelor of Arts in geography and politics from Queen’s University and her Bachelor of Laws from Osgoode Hall Law School.
Ms. Calwell is proud of building diverse and resilient teams. Her commitment to Diversity, Equity and Inclusion (DEI) is evidenced by her role supporting the creation of the OEB’s first DEI road map. She is the OEB’s executive champion for mental health and ensures a purposeful approach to DEI at the OEB, with a view to demonstrating leadership in the sector.
Ms. Calwell is active in the energy sector at large within Ontario and Canada. She participates in the executive of the Ontario chapter of the Energy Bar Association. She chairs the International Confederation of Energy Regulators’ Technology & Innovation working group and she represents the OEB internationally at the Regulatory Energy Transition Accelerator (RETA) steering committee.