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Management Team

Bruce Campbell, President and Chief Executive Officer

Bruce Campbell is President and Chief Executive Officer of the Independent Electricity System Operator. Under Mr. Campbell’s leadership, the IESO oversees the safe and reliable operation of Ontario’s bulk electrical system – one of the most diversified, reliable and efficient markets in the world. The organization also oversees the operation of Ontario’s wholesale electricity market.

Mr. Campbell has over 30 years of regulatory and executive experience in the energy sector. In his most recent position as Vice President – Resource Integration, Mr. Campbell oversaw preparations in power system operations for the integration of an anticipated 10,700 MW of wind and solar generation in the province by 2018. Recruited from a successful legal career, where he regularly appeared before the Ontario Energy Board and other tribunals, Mr. Campbell joined the IESO as Vice President, Regulatory and Legal Affairs in 2000. Since that time Mr. Campbell has taken on an increasingly wide range of executive responsibilities.

In addition, Mr. Campbell serves as a member of NERC’s Member Representative Committee and of the ISO/RTO Council which works to develop effective processes, tools, and standard methods for improving competitive electricity markets across North America.

A member of the Law Society of Upper Canada, Mr. Campbell also holds the Institute of Corporate Directors’ ICD.D (Certified Director) designation.


Ted Leonard, Vice-President Markets, CFO and Treasurer

Ted Leonard is Vice-President - Markets, Chief Financial Officer and Treasurer.  In this capacity, he is responsible for market evolution and sector policy analysis, all financial management aspects of the organization, including corporate and market accounting, and the credit risk and settlement of the wholesale electricity markets. He also chairs the IESO’s Pension Management Committee.

Mr. Leonard has been with the IESO from its formation in 1999. Previously he held the positions of Director - Finance, Corporate Controller and Manager - Financial Systems and Support.

Prior to his current role he worked in progressively senior finance roles within the electricity sector since 1996. Before joining the IESO, Mr. Leonard was with Ernst & Young LLP.

Mr. Leonard is a native of Sudbury, Ontario and is Chartered Accountant and a graduate of Laurentian University (B. Com.).


Bill Limbrick, Vice-President, Information and Technology Services and CIO

Bill Limbrick is Vice-President – Information and Technology Services, and Chief Information Officer. The Information and Technology Services business unit is responsible for information technology; organizational governance; support and facilities. He also has oversight of the Smart Metering Entity.

Prior to joining the IESO, Mr. Limbrick was with PricewaterhouseCoopers (PwC) and Sun Life Assurance in the UK. As a PwC Principal Consultant, he worked with the IESO to implement the IESO-administered market and in 1998 as a PwC program manager worked on the expansion of the competitive electricity market in the UK.

Mr. Limbrick holds a degree in Mathematical Economics from the University of Essex.


Kim Warren – Vice-President, Operations and COO

Kim Warren was appointed Vice-President, Operations and Chief Operating Officer in May 2011. In this role, Mr. Warren is responsible for the planning and assessment function, managing the operation of Ontario’s competitive wholesale electricity market, and directing the operation of the IESO-controlled grid.

With over 34 years of experience in the Ontario electricity industry, Mr. Warren recently served as Director of Planning and Assessments where he directed the development of operating policies, reliability standards, system operating limits and grid connections associated with interconnected power system operations. Mr. Warren has also served as Manager of Regulatory Affairs and Manager of System Operations, during which time he was directly responsible for real-time operations in the control room leading to the successful restoration of the province’s power system following the 2003 blackout.


Terry Young, Vice-President, Corporate and Employee Relations

Terry Young is Vice-President – Corporate and Employee Relations, responsible for managing the IESO’s many external and internal relationships. His accountabilities include human resources, corporate strategy, government and regulatory affairs, customer relations, communications and marketplace training. He is responsible for the IESO’s stakeholdering processes, including the Stakeholder Advisory Committee which provides advice and recommendations on market development and planning decisions. Mr. Young also acts as the IESO’s representative on the Ontario Smart Grid Forum.

A well-known spokesperson with 30 years of experience in the electricity industry, Mr. Young started his career as a journalist with Canadian Press-Broadcast News. He also serves as President, Ontario Branch of the Kidney Foundation of Canada.

Mr. Young has been with the IESO since 2002.


Roy Stewart, General Counsel, Secretary, and Chief Reliability Compliance Officer

Roy Stewart has been IESO’s General Counsel since October 2000. A graduate of Dalhousie Law School in 1984, Mr. Stewart began practicing law in Ontario in 1986 with Fraser & Beatty, now Dentons Canada LLP, and was a partner in the firm’s Financial Services Group for the last eight years at the firm. Mr. Stewart is also the IESO’s Corporate Secretary and in that capacity assists the IESO Board in fulfilling its governance mandate. As Chief Reliability Compliance Officer, Roy exercises an internal oversight role over the business units that have compliance responsibilities for reliability standards.

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