Governance

Leadership Team

Committed to our customers

Our people have always been our greatest competitive advantage. The incredible strength of our team around the world has enabled us to assemble an exceptionally experienced Executive Team, comprised of talented business leaders from a diverse range of industries. Together, they bring decades of operational excellence and a shared, unwavering commitment to our customers.

Our Leadership Team

  • Siegfried W. Kiefer, President & Chief Executive Officer, Canadian Utilities Limited and President, ATCO Ltd.
    Siegfried W. Kiefer

    Siegfried W. Kiefer

    President & Chief Executive Officer, Canadian Utilities Ltd. and 
    President, ATCO Ltd.

    Siegfried Kiefer is the President & Chief Executive Officer of Canadian Utilities Limited (CU). Mr. Kiefer was named CU's President & Chief Executive Officer on May 8, 2019, after previously holding the title of President & Chief Strategy Officer for ATCO Ltd. and Canadian Utilities Limited, an ATCO Company, from October 2016, prior to which he held the title of President, Canadian Utilities Limited, from May 2015, and Chief Operating Officer, Power & Utilities, from July 2013.

    Formerly, Mr. Kiefer was Managing Director, Utilities Business Group, where he oversaw the operations of ATCO Gas, ATCO Electric and ATCO Pipelines, along with subsidiaries Northland Utilities Limited and ATCO Electric Yukon. He also oversaw the formation and operations of ATCO Energy Services and served as Chief Information Officer for ATCO Group for more than 11 years, until late 2009.

    Mr. Kiefer’s career with ATCO and its subsidiaries began in 1983 when he started with Canadian Western Natural Gas as a Financial Analyst, and was later appointed to various technical and management roles within Canadian Utilities’ Information Services.

    In 1997, Mr. Kiefer transferred to ATCO Gas Services Ltd., now known as ATCO Energy Solutions, as Manager, Utility Services. One year later, he was appointed Vice President, Information Technology & Chief Information Officer within ATCO Group, and took on the added role as President, ATCO I-Tek, in 1999. In July 2000, Mr. Kiefer was appointed Managing Director, Technologies Business Group, ATCO Ltd. & Canadian Utilities Limited, where he oversaw the operations of ATCO I-Tek while retaining the CIO role within ATCO’s head office.

    Mr. Kiefer has a Bachelor of Commerce degree from the University of Calgary. He is married to Colleen and has a son, Stefan, and a daughter, Reegan.

  • Dennis DeChamplain, Senior Vice President & Chief Financial Officer
    Dennis A. DeChamplain

    Dennis A. DeChamplain

    Senior Vice President & Chief Financial Officer

     

    Dennis DeChamplain was appointed Senior Vice President & Chief Financial Officer for ATCO and Canadian Utilities Limited, effective June 1, 2017. In this role, he is responsible for the overall financial management of the company including Finance, Accounting, Treasury, Taxation, Risk Management, Regulatory Affairs, Investor Relations and Internal Audit.

    Mr. DeChamplain joined ATCO in 1992 and has held progressively senior financial, regulatory, and business planning positions throughout the company. He transferred to ATCO Electric in 1996 as a Corporate Accountant and in 2010 was promoted to Manager, Financial Reporting and Accounting. In 2013, Mr. DeChamplain was appointed Senior Vice President, Finance & Regulatory with ATCO Electric’s Transmission Division and was responsible for the Corporate Finance, Accounting, Planning, Forecasting, and Regulatory functions.

    Since 2015, Mr. DeChamplain has overseen the financial management of ATCO’s Electricity Global Business Unit in the role of Senior Financial Officer, providing exceptional financial leadership and management of the group’s diversified global operations in electricity generation, transmission and distribution.

    Mr. DeChamplain was born and educated in Edmonton, and graduated from the University of Alberta in 1985 where he obtained a Bachelor of Commerce degree. He obtained his Chartered Accountant designation in 1988 and is a member of both the Alberta and Canadian Institutes of Chartered Professional Accountants.

  • M. George Constantinescu, Senior Vice President & Chief Transformation Officer
    M. George Constantinescu

    M. George Constantinescu

    Senior Vice President & Chief Transformation Officer

     

    George Constantinescu is Senior Vice President & Chief Transformation Officer with ATCO and Canadian Utilities Limited. In this role, Mr. Constantinescu is responsible for leading transformation initiatives that enable innovation and growth across the enterprise, and advancing new commercial initiatives around the world.

    Mr. Constantinescu first joined ATCO in 1986 and has held progressively senior positions in ATCO Gas, ATCO Electric, ATCO Power and ATCO’s Corporate Office. He played a pivotal role in establishing ATCO’s international electricity generation operations in Australia, as well as evaluating opportunities both in the United Kingdom and the United States. In 2002, he joined ATCO’s Corporate Office as Senior Manager, Corporate Development, where he was an instrumental member of the team that successfully led the strategic divestiture of ATCO’s retail energy operations. Mr. Constantinescu was appointed Senior Vice President & Chief Transformation Officer in February 2018, after spending 14 years cultivating substantial entrepreneurial experience in a range of diverse industries throughout North America.

    Mr. Constantinescu graduated from the University of Alberta with a B.Sc in Electrical Engineering. He is a member of the Board of Directors of OGEO Limited and ORTHOSHOP Geomatics Ltd.

  • George J. Lidgett, Managing Director, Pipelines & Liquids
    George J. Lidgett

    George J. Lidgett

    Managing Director, Pipelines & Liquids

     

    George Lidgett is the Managing Director, Pipelines & Liquids Global Business Unit. In this role, Mr. Lidgett is responsible for the company’s domestic and international growth for ATCO’s natural gas and liquids business lines. He brings more than 30 years of ATCO experience to the position.

    Mr. Lidgett was most recently President, ATCO Structures & Logistics Ltd. He began his career with ATCO Gas in 1985 as Assistant Engineer, Planning & Gas Operations in Edmonton. He held increasingly responsible positions including Engineer, Design, Senior Engineer, Planning, Supervising Engineer, Industrial & Producer Marketing and Manager, Distribution, Edmonton Plant & Equipment.  In 1999, he was appointed Manager, Operations for ATCO Pipelines and a year later, was appointed Vice President, Operations in Calgary. He re-joined ATCO Gas in 2005 as Vice President, Calgary Operations and in 2007 joined ATCO Frontec as Vice President, Commercial and Construction.

    Mr. Lidgett was born and raised in Grande Prairie, Alberta. He graduated from the University of Alberta in 1985 with a B.Sc in Mechanical Engineering. He has served with the Canadian Gas Association, Western Energy Institute and is a former Director of the Canadian Energy Pipeline Association and Van Horne Institute.

  • Wayne K. Stensby, Managing Director, Electricity
    Wayne K. Stensby

     

    Wayne K. Stensby

    Managing Director, Electricity

     

    Wayne Stensby is Managing Director, of the Electricity Global Business Unit. The Electricity Global Business Unit was created with the goal of aggregating Canadian Utilities Limited’s skills in electricity generation, transmission and distribution. Mr. Stensby is tasked with leading the strategy and development for the Electricity Global Business Unit’s long-term products and services growth.

    Mr. Stensby joined ATCO in 1988 and has held a variety of operational and engineering leadership positions, including assignments in Canada, the U.K. and most recently Australia. As Managing Director & Chief Operating Officer for ATCO Australia, Mr. Stensby was responsible for ATCO Australia’s overall operation.

    Mr. Stensby holds a B.Sc. in Electrical Engineering from the University of Alberta and is registered as a Professional Engineer with APEGA.

  • Marshall F. Wilmot, President, ATCOenergy, Chief Digital Officer
    Marshall Wilmont

    Marshall F. Wilmont

    President, ATCOenergy, Chief Digital Officer

     

    Marshall Wilmont is President, ATCOenergy, and Chief Digital Officer for ATCO and Canadian Utilities Limited. In his dual role, Mr. Wilmont is responsible for establishing the strategic long-range goals of ATCOenergy along with spearheading ATCO's digital presence and emerging e-commerce platform. 

    ATCOenergy has been ATCO and Canadian Utilities Limited’s retail arm providing electricity and natural gas to homes and businesses in Alberta since 2016, and also integrates ATCO Blue Flame Kitchen as a popular customer-facing program. Securing 10 per cent of competitive retail market share in just three years, ATCOenergy is an exciting area of growth for the company. 

    Since 2018, Mr. Wilmont has overseen ATCOenergy through a key transitional period and implemented company-wide digital development initiatives. With more than 30 years of experience and considerable digital and marketing expertise gleaned from his years of service in senior executive roles at some of the nation’s most reputable brands in retail, airlines and telecommunications, Mr. Wilmont is transforming ATCO and Canadian Utilities Limited’s digital landscape and optimizing the company’s nascent e-commerce platform to deliver a strong brand, drive significant growth and increase revenue.

    Mr. Wilmont earned an MBA from Nyenrode Business Universiteit, the Netherlands, and a Bachelor of Commerce degree (Bcomm, Finance Major) from the University of Calgary.