Direction and Leadership
ENMAX Corporate Governance
Executive Team
Meet the Executive Team
Mark Poweska
President and Chief Executive Officer
Sheri Primrose
Chief Financial Officer
Greg Retzer
Executive Vice President, ENMAX Power
Erica Young
Executive Vice President, ENMAX Energy
John Flynn
President, Versant Power
Brandie Yarish
Chief Human Resources Officer and Executive Vice-President, Safety and Information Technology
Brandie is accountable for ENMAX’s people strategies, organizational development, health, safety and environment programs and practices, as well as the IT team.
Sarah Stevens
Senior Vice President, Legal and Regulatory
Marie Rajic
Senior Vice President, Corporate Affairs
Board of Directors
To contact our Board of Directors, please email boardofdirectors@enmax.com.
Meet the Board of Directors
Charles Ruigrok
Charles Ruigrok joined the ENMAX Board in 2010 and is the Chair of the Board, having previously served as Chair of ENMAX’s Audit Committee and as Board Chair of Versant Power, ENMAX’s Maine-based transmission and distribution business. Mr. Ruigrok also served as ENMAX’s President & CEO, on an interim basis, between 2011-2012 and 2021-2022.
Mark Poweska
President and Chief Executive Officer
Nipa Chakravarti
Laura Formusa
Laura Formusa joined the ENMAX Board in 2017 and is the Chair of the Human Resources Committee. She also serves as Board Chair of Tantalus Systems Holding Inc., as Chair of the Corporate Governance and Nominating Committee of Equitable Life Insurance Company of Canada, and as a Director of 407 International Inc. Laura has also served on the Board of Governors of York University.
Daryl Fridhandler K.C.
Eric Markell
Eric Markell joined the ENMAX Board in 2016 and is the Chair of the Audit Committee. Eric is a member of the Board of Trustees and Treasurer of the United States Eventing Association Foundation, a 501(c)(3) entity where he also serves as a member of its Investment Committee.
Barbara Munroe
Byron Neiles
Byron Neiles joined the ENMAX Board in 2022 and has over 30 years of experience in the energy industry. In 2024, he retired as the Executive Vice President & Chief Administrative Officer at Enbridge Inc. in Calgary, where he led the IT, human resources, real estate, supply chain management, public affairs, communications and sustainability teams.
Dr. Chika Onwuekwe K.C.
Elise Rees
William Taylor
William (Bill) Taylor joined the ENMAX Board in 2020 and has over 30 years of experience in the energy sector.
Before joining ENMAX, Bill spent 21 years at TransCanada Corporation (now TC Energy) where he held various senior executive positions. Bill held the position of Executive Vice-President and Division President, Energy at TransCanada and prior to that, held various senior executive positions, including Senior Vice-President, Power. He was responsible for profitability and growth of the company's power business, non-regulated gas storage and its non-regulated joint ventures in Canada and the United States.
Bruce Williamson
Bruce Williamson joined the ENMAX Board in 2020 and has over 30 years of experience in the energy sector.
Before joining ENMAX, Bruce held many senior executive positions including: President & CEO and Board Chair of Southcross Energy Partners; President & CEO and Board Chair of Cleco Corporation; President and CEO and Board Chair of Dynegy Corporation; President & CEO of Duke Energy Global Markets; Board Chair of Southcross Holdings; an independent Board member of Questar Corporation; and served on the UH Chancellor’s National Advisory Council. Bruce also spent four years with PanEnergy Corp as SVP, Finance and Corporate Development and prior to that, he spent 14 years with Shell Oil and various Shell affiliates in a variety of positions, primarily in exploration and production and finance where he rose to be Assistant Treasurer of Shell Oil Company (Shell USA).