Our executive team

As OPG’s Chief Operations Officer, Shelley is responsible for overseeing the safe and reliable operation of OPG’s diverse generating fleet.

Shelley had recently served as the President and Chief Executive Officer of OPG’s subsidiary, Atura Power. With strategic and visionary leadership, she headed a dedicated team in the operation of Ontario's largest fleet of combined-cycle natural gas turbine power plants, while also delivering an ambitious growth plan that included the development of low-carbon hydrogen production and battery energy storage centres.

Previously, Shelley served as OPG’s Chief Legal and Ethics Officer, and led the company's Environment, Social and Governance work. In 2021, under her leadership, OPG's Law Division was named the Energy and Resources Law Department of the Year by the Canadian Law Awards, and Shelley was awarded Tomorrow's Leader by the Canadian General Counsel Awards in 2018. She practiced commercial litigation at a large, national Bay Street law firm prior to joining OPG.

Shelley earned an LLB from the University of Windsor, a BBA at Wilfrid Laurier University, and holds her ICD.D designation. She also completed the Reactor Technology Course for Utility Executives, co-sponsored by the Massachusetts Institute of Technology and the Institute for Nuclear Power Operations.

During her personal time, Shelley enjoys spending time with her husband and two children on the lake and ski hill.

Aida Cipolla is OPG’s Chief Financial Officer (CFO) and Corporate Services Officer. Aida and her team are responsible for providing OPG with strategic leadership and strategy for: business planning; accounting and financial reporting; treasury; taxation; fund management; commercial integration and strategy; internal audit; and enterprise risk management. Additionally, she oversees corporate services related to human resources; labour relations; information technology; real estate; and ethics and equity.

An experienced business executive, Aida joined OPG in March 2022 from Toronto Hydro, where she had worked since 2008, most recently as Executive Vice President and CFO. She supported critical initiatives such as electricity rate applications and successfully reshaped Toronto Hydro’s Finance function using transformational strategies that include automation, blending industry best practices, and practical business solutions to drive strong financial performance. She also led their Climate Action Plan financial strategy to support Toronto’s Transform TO initiative towards sustainability, and Toronto Hydro’s financial response to the COVID-19 pandemic. Prior to joining Toronto Hydro, Aida worked for KPMG LLP in Toronto and Dublin, Ireland, leading audit and advisory engagements.

Aida is known as a forward-thinking thought leader and spokesperson for the electricity industry. She is the first woman to chair the Electricity Canada (formally Canadian Electricity Association) CFO committee. Aida is a mentor through formal mentorship programs and is a strong advocate for equity, diversity, and inclusion initiatives. She was recognized as one of Canada’s Top 100 Most Powerful Women in 2020 and as an Honouree in Canada's Top 40 Under 40 in 2019.

She is a Fellow Chartered Professional Accountant (FCPA, FCA), has received the Institute of Corporate Directors Designation and holds an Honours Bachelor of Commerce Diploma with a minor in Economics from McMaster University, Michael G. DeGroote School of Business. Aida sits on the Board of Directors of Laurentis Energy Partners, Women’s College Hospital and Women’s College Hospital Academic and Medical Services Group and is the Chair of the Quality, Academic, & Equity Committee of Women’s College Hospital.

Aida is a devoted wife and mother of two young children.

As Senior Vice President, Business Development and Corporate Affairs, Heather’s focus includes ensuring progress on the company’s Reconciliation Action Plan, and advancing hydroelectric generation development across the province in partnership with local Indigenous communities. She is also responsible for all stakeholder, public and media outreach, government relations, Indigenous relations, and branding activities in support of OPG’s business goals.

Heather has more than twenty-five years’ experience in the resource development, energy and electricity sectors. This includes roles as OPG’s VP of New Business Ventures & Electrification, VP of Environment, and Director of the Hydro Business Development Group. In these roles, she was instrumental in starting OPG’s electrification business as well as assembling the OPG team working to advance small modular nuclear reactors. As the hydro business development lead, Heather and her team successfully built northern power projects in partnership with Indigenous communities. She also previously worked in the Calgary office of Golder Associates supporting clients from the mining and oil & gas sectors.

Heather currently serves as a Director on the Boards of Atura Power, APPro, Canadian Nuclear Association and Electricity Canada, and is Vice Chair of Electricity Canada’s Generation Council. She holds an undergraduate and Master's degree in Science from Queen's University, as well as an MBA from the Rotman School of Management.

Kim Lauritsen is OPG’s Senior Vice President of Enterprise Strategy & Growth. Kim is responsible for OPG’s corporate strategy development and new growth initiatives, including in new nuclear growth and ensuring strategic alignment across OPG’s portfolio of subsidiaries. Kim sits on the Board of Directors of several of OPG’s subsidiary companies, and is the Chair of PowerOn Energy Solutions.

Kim has more than 20 years of experience in the energy industry, having worked across various parts of the value chain, in diverse geographies. Prior to joining OPG in 2019, Kim worked at Origin Energy in Australia, focused on commercial strategy and transactions, energy markets, renewable energy development and liquefied natural gas projects. Prior to that, Kim worked at Shell in Europe, with a focus in finance, modeling and economics.

Kim holds a Bachelor of Commerce from McGill University, a Master’s of Science in Renewable Energy Development from Heriot-Watt University and an MBA from INSEAD. Kim is also a member of the Independent Electricity System Operator (IESO) Strategic Advisory Committee.

Brenda MacDonald is OPG’s Chief Commercial Officer. Brenda and her team are responsible for structuring, negotiating and managing the strategic commercial relationships that support OPG’s growth strategy, as well as all aspects of supply chain and procurement, including OPG’s supply chain strategy supporting the company’s nuclear and renewable generation operations, and growth and corporate functions. Brenda is also responsible for Regulatory Affairs, helping develop and execute OPG’s regulatory strategies and policies, and leading the company’s interactions with economic regulators, market operators, and reliability organizations.

Brenda joined OPG in 2013 as Vice President, Law and General Counsel. In this role she was accountable for the oversight and management of OPG’s legal affairs. In 2017, she took on the role of Vice President, Regulatory Affairs.

Prior to joining OPG, Brenda spent more than 15 years at Bell Canada Enterprises (BCE), holding various positions, including Assistant General Counsel for BCE’s Business Markets and Procurement. She also served as counsel for Abitibi-Consolidated (now Resolute Forest Products).

Brenda received a Bachelor of Arts (Honours) from St. Francis Xavier University, and holds a Masters of Political Science in Political Studies and a Bachelor of Laws from Queen’s University. She currently serves as President of the Board of the Association of Corporate Counsel (Ontario Chapter).

Carlton Mathias is the Chief Legal, ESG, and Governance Officer at OPG. Carlton lead’s OPG’s Law Division, OPG’s work towards accelerating Environmental, Social, and Governance performance and reporting, and as the Chief Governance Officer is the trusted advisor to the OPG Board and leads OPG’s Corporate Governance Program. Carlton has received the Institute of Corporate Directors Designation and the ESG Global Competent Boards Designation.

Carlton is called to the Bar of Ontario, having graduated from Osgoode Hall Law School and the University of Toronto before that. He practiced first as a commercial litigator and then in energy and infrastructure law and was a partner at international Bay Street law firms. Carlton also worked at the Ministry of Energy leading the negotiation of inter-provincial power purchase agreements. Carlton has been at OPG for over 15 years.

Carlton is a member of the Institute of Corporate Directors Chapter Executive for the Greater Toronto Area. He is a member of the Board of Directors of the Governance Professionals of Canada and is also on the Board of Directors of PowerON Energy Solutions Inc., an OPG subsidiary that is a leader in the transit electrification business.

Carlton has been an adjunct professor at Osgoode Hall Law School instructing in both the Trial Practice and the Lawyer as Negotiator courses.

Paul Séguin is the Senior Vice President, Pickering Nuclear. He is responsible for the safe operation of the Pickering Generating Station. He brings an operations focus, with expertise in team building, leader development and organizational effectiveness.

In his 23 years with OPG, Paul has held a wide range of roles in Engineering and Operations at the Pickering Generating Station, as well as corporate support for Nuclear Operations. This includes positions as Certified Shift Manager, Operations Manager and the Director of Nuclear Oversight. Paul completed a secondment with the World Association of Nuclear Operators in Atlanta in 2021 supporting the evaluation of Organizational Effectiveness at a number of US nuclear facilities. Prior to this role, Paul was the Senior Vice President of Renewable Generation for OPG, responsible for the safe operation of OPG’s hydroelectric, thermal and solar generation in Ontario.

Paul sits on the Board of Directors of Eagle Creek Renewable Energy. Paul obtained a degree in Chemical Engineering from the University of New Brunswick, and is a graduate of their Nuclear and Power Plant Engineering option program.

Neal Simmons is Eagle Creek’s President and Chief Executive Officer bringing strategic leadership and strong innovation and technical expertise. Neal previously served as Senior Vice President of Engineering & Major Projects at Eagle Creek, as Vice President of Engineering at Cube Hydro, and as a professor of mechanical engineering at Duke University for 15 years. At Duke, he played a key role in the formation of Energy Engineering program. Neal remains committed to the importance of energy education and continues to teach courses at Duke on renewable energy technologies, modern power systems, hydroelectric generation, and engineering innovation. He has also overseen the rehabilitation, automation, and management of several damaged and underperforming hydroelectric projects.

Neal has started two successful engineering companies and has been granted over 30 US patents, which are licensed worldwide. He has over 90 peer reviewed publications and conference proceedings.

Neal graduated from Bucknell University with a degree in Mechanical Engineering and from Duke University with a Ph.D. in Mechanical Engineering and Materials Science.

Since joining OPG in 2001, Subo has held various leadership roles within the Nuclear Division. As OPG’s Chief Projects Officer, she focuses on project excellence and team-building to generate clean, reliable power for Ontarians. Subo emphasizes project excellence by leading with world class project fundamentals, leveraging lessons learned and recognizing the importance of great leadership.  Her portfolio comprises the Darlington New Nuclear Project, which is the first Small Modular Reactor in the Western world, the Refurbishment of Darlington and Pickering Nuclear, as well as redevelopment and build of Hydro Stations and Dams. Subo is part of the Executive Leadership Team and serves on the board of the Nuclear Waste Management Organization.

In her previous role as Senior Vice President of Nuclear Refurbishment, Subo was accountable for all aspects of the Darlington Refurbishment Project, which will prepare the plant for over 30 additional years of cost-effective, safe, and reliable power generation. She successfully guided the project through numerous milestones, notably achieving Unit 3’s return to commercial operations ahead of schedule. Subo's commitment to innovation and fostering a sustainable culture has empowered the team to continue to execute the Refurbishment project with exceptional performance. Under her leadership, the Darlington Refurbishment Project had gained international recognition, with industry leaders worldwide seeking to benchmark Ontario Power Generation’s accomplishments.

Subo is a strong proponent of Equity, Diversity, and Inclusion and serves as the executive sponsor of OPG’s women's empowerment groups, which aim to create an environment conducive to women's success in the workplace. Additionally, Subo mentors women both within the organization and through various external forums.

Subo is a graduate from the University of Guelph, with a B.Sc. (Hons) in Environmental Engineering and has been a member of the Professional Engineers Ontario since 1998.