Management Team

Paul Murphy, President and Chief Executive Officer

Paul Murphy is President and Chief Executive Officer of the Independent Electricity System Operator. Under Mr. Murphy, Ontario's IESO is responsible for overseeing the safe and reliable operation of Ontario's bulk electrical system - one of the most diversified, reliable and efficient in the world. The organization also oversees the IESO-administered wholesale electricity markets.

Previously, as Chief Operating Officer, Mr. Murphy led the IESO through the opening of the market and the recovery from the 2003 blackout. He has worked in the operation and planning of Ontario’s electrical system for over 30 years and in the development of competitive markets for the last ten.

Mr. Murphy frequently represents the IESO and other independent system operators on multi‐jurisdictional committees providing strategic and policy advice on reliability and cyber security matters. During 2008, Mr. Murphy chaired the Ontario Smart Grid Forum, an industry initiative aimed at enabling Ontario’s future electricity system.

Mr. Murphy has a Bachelor of Applied Science from Queen’s University in Kingston, Ontario and is a registered Professional Engineer in Ontario.

Bruce Campbell, Vice-President - Resource Integration

Bruce Campbell has over 30 years of regulatory and executive experience in the energy sector. Recruited from a successful legal career, where he regularly appeared before the Ontario Energy Board and other tribunals, Mr. Campbell joined the IESO (the Independent Electricity System Operator) as Vice-President, Regulatory and Legal Affairs in 2000.

Since that time Mr. Campbell has taken on an increasingly wide range of executive responsibilities, currently holding the position of Vice-President – Resource Integration. In addition, Mr. Campbell serves as a Vice-Chair of the Board of Directors and member of the Audit Committee of the Northeast Power Coordinating Council, Inc., responsible for establishing and enforcing reliability standards for the power industry across eastern Canada and the northeastern United States.

A member of the Law Society of Upper Canada, Mr. Campbell also holds the Institute of Corporate Directors’ ICD.D (Certified Director) designation. Well known and respected in the regulatory, government and broader industry arena, Mr. Campbell represents the IESO on the company’s Stakeholder Advisory Committee.

Ted Leonard, Vice-President - Finance

Ted Leonard is Vice-President - Finance, Chief Financial Officer and Treasurer.  He is responsible for all financial management aspects of the organization including both corporate and market accounting.  

Mr. Leonard is a 13-year veteran of the electricity industry and 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.

Mr. Leonard is a Chartered Accountant. Prior to joining the IESO, he worked in public accounting at Ernst & Young LLP in Toronto.  Mr. Leonard is a graduate of Laurentian University (B. Com.).

Bill Limbrick, Vice-President - Organizational Development

Bill Limbrick is Vice-President - Organizational Development and Chief Information Officer. Under Mr. Limbrick, the Organizational Development business unit is responsible for information technology; security and infrastructure; business process engineering; and human resources.

Prior to joining the IESO as Vice-President of Information Technology and Infrastructure in 2001, Mr. Limbrick was with PricewaterhouseCoopers (PwC) where, as a Principal Consultant, he worked with the IESO over a three-year period on the program to introduce the new IESO-administered market. In his eight years with PwC, Mr. Limbrick worked in several industries within the utilities sector and was a program manager in the 1998 expansion of the competitive electricity market in the UK. Previously, Mr. Limbrick had a long career with Sun Life Assurance (UK) where he held a number of management positions in information technology.

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

Kim Warren – Vice-President - Operations

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

With over 30 years 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. He was also responsible for the IESO’s power system reliability reporting obligations and Ontario’s interactions with NERC, NPCC and our interconnected neighbours.

Terry Young, Vice-President, Corporate Relations

Terry Young is Vice-President - Corporate Relations, responsible for managing many of the IESO’s external relationships. His accountabilities include government and regulatory affairs, customer relations, communications, marketplace training and stakeholder engagement.

A well-known spokesperson in the electricity industry, Mr. Young started his career as a journalist with Canadian Press-Broadcast News before joining the energy industry with Ontario Hydro. He has worked as a communications consultant in the private sector and served as Director of Public Affairs with Hydro One.

Mr. Young has been with the IESO for the past eight years.

Roy Stewart, General Counsel and Corporate Secretary

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 Fraser Milner Casgain, 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.