Leadership Team

Committed to our customers

From the field to the office, 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, our team brings decades of operational excellence and a shared, unwavering commitment to our customers.

Our Leadership Team

  • Nancy C. Southern, Chair & Chief Executive Officer, ATCO Ltd. and Executive Chair, Canadian Utilities Limited
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    Nancy C. Southern

    Chair & Chief Executive Officer, ATCO Ltd. and
    Executive Chair, Canadian Utilities Limited


    Nancy Southern is Chair & Chief Executive Officer of ATCO Ltd., as well as Executive Chair of Canadian Utilities Limited, an ATCO company. Reporting to the Boards of Directors, she has full responsibility for executing the strategic direction for both companies, and for the ongoing operations of ATCO.

    After joining the ATCO Board of Directors in 1989, Ms. Southern served as Co-Chair of ATCO for 16 years prior to being elected Chair in December 2012. Ms. Southern was named President & Chief Executive Officer of ATCO Ltd. in 2003. She serves on the boards of all ATCO subsidiary companies. Ms. Southern also serves as Executive Vice President of Spruce Meadows and is a Founding Director of AKITA Drilling Ltd., a Director of Sentgraf Enterprises Limited, an Honorary Director of the BMO Financial Group and serves on the Rideau Hall Foundation Board of Directors.

    In addition to her business leadership, Ms. Southern has long played a leading role in advocating on social issues of global importance – most notably, the rights of Indigenous peoples and the role of women in business. She is an Honorary Chief of the Kainai (Blood Tribe of Alberta) and was given the name Aksistoowa'paakii, or Brave Woman in 2012. In 2015, at the request of German Chancellor Angela Merkel, Ms. Southern joined 100 global leaders for the G7 Forum for Dialogue with Women in Berlin.

    Over the course of her career, Ms. Southern has served with some of the world’s most prestigious and influential organizations. She is a member of The U.S. Business Council, a member of the American Society of Corporate Executives, a Canadian Member of the Trilateral Commission and a member of the South Australian Minerals and Petroleum Expert Group.  She is also a member of the Business Council of Canada, serves as Vice Chair of the Alberta Business Council and sits on the University of Calgary School of Public Policy Advisory Council. In March of 2020, Ms. Southern joined the Premier’s Economic Recovery Council with other policy and industry experts providing insight and strategies to accelerate diversification of Alberta’s economy. 

    In 2018, the University of Calgary School of Public Policy honoured Ms. Southern with the “Distinguished Policy Fellow Award”, in recognition of her lifetime commitment to Canadian public policy. Earlier that year, she received the “Canadian Business Leader Award” from the University of Alberta School of Business and its Business Advisor Council – making history as the first second-generation recipient of that honour. She was inducted as a Companion into the Canadian Business Hall of Fame in 2017. In that same year, in recognition of her achievements in economics and industry, Ms. Southern was awarded an honorary Doctor of Laws degree from Western University. In 2014, the University of Calgary awarded her its highest academic honour, an honorary Doctor of Laws degree bestowed in recognition of notable achievements and community service. In 2013, she received the “T. Patrick Boyle Founder’s Award” from the Fraser Institute for her entrepreneurial achievements and recognized accomplishments in the promotion of freedom and free markets. In 2012, Canada’s Public Policy Forum awarded Ms. Southern the “Peter Lougheed Award for Leadership in Public Policy”. 

    In 2016, Ms. Southern was included in Fortune’s list of the “50 Most Powerful Women” outside of the U.S. and recognized by the Financial Post Magazine’s “The Power List”. Previously, she was also included in Fortune’s list of the “50 Most Powerful Women in Business: The Global 50” and named as one of “The 50 Most Important People in Canada” in Maclean’s Magazine. In 2011, she was selected as “Business Person of the Year” by Alberta Venture Magazine and in 2005, was selected “Business Woman of the Year” by the Consumer’s Choice Awards. 

    Born and raised in Calgary, Alberta, Ms. Southern studied Economics and Commerce at the University of Calgary.

  • Siegfried W. Kiefer, President & Chief Executive Officer, Canadian Utilities Limited and Member, Office of the Chair, ATCO Ltd.
    Siegfried W. Kiefer

    Siegfried W. Kiefer

    President & Chief Executive Officer, Canadian Utilities Limited and Member, Office of the Chair, ATCO Ltd. 


    Siegfried Kiefer is President & Chief Executive Officer of Canadian Utilities Limited (CU) and Member, Office of the Chair, ATCO Ltd. 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 A. DeChamplain, Executive Vice President & Chief Financial Officer
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    Dennis A. DeChamplain

    Executive Vice President & Chief Financial Officer


    Dennis DeChamplain was appointed Senior Vice President & Chief Financial Officer for ATCO, effective June 1, 2017. In this role, he is responsible for the overall financial management of ATCO 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.

  • Adam M. Beattie, President, Structures
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    Adam M. Beattie

    President, Structures


    Adam Beattie is the President of ATCO’s Structures division. Reporting to the Chair & Chief Executive Officer, Mr. Beattie is responsible for leading Workforce Housing, Space Rentals, and Permanent Modular Construction business lines worldwide, as well as the manufacturing of modular products.

    ATCO’s Structures division sells and leases Workforce Housing products in Canada, the U.S., Australia, Chile and other select international markets. The Space Rentals and sales business leases and sells relocatable modular offices, classrooms and other structures in Canada, Australia, the U.S. and Chile. . The Structures division also designs and manufactures permanent modular building solutions that include dormitories, schools, daycares, gymnasiums, hockey arenas, gas stations, multi-purpose community centres and offices.

    In Australia, Mr. Beattie managed the successful delivery of the Wheatstone LNG modular project and led the conceptualization and construction of our manufacturing facility in Western Australia. He has also been successful in driving the Structures Global Business Unit’s diversification into non-traditional, resource and construction markets in Canada. 

    Mr. Beattie joined ATCO in 2003 with Structures & Logistics in Brisbane, Australia and has held increasingly senior operational and leadership roles. Mr. Beattie moved to Perth, Western Australia to establish the ATCO Structures business in 2009, returning to Brisbane in 2011 to be involved in securing and executing three major Curtis Island workforce housing projects for LNG facilities being constructed on the island. Mr. Beattie completed his tenure in Australia as Managing Director in 2016, and then relocated with his family to Calgary to become Senior Vice President, North America.  In November of 2017, Mr. Beattie was promoted to the position of Senior Vice President & General Manager, Structures, responsible for all Structures business worldwide.

    Mr. Beattie earned a Bachelor of Business degree in 2001 from the Queensland University of Technology in Brisbane, Australia, and is currently studying for a Bachelor of Law degree from the University of Southern Queensland.

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

    Senior Vice President & Chief Transformation Officer


    George Constantinescu is Senior Vice President & Chief Transformation Officer. 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.

  • Jim Landon, President, Frontec
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    Jim Landon

    President, Frontec


    Jim Landon is President, Frontec, where he leads the development and implementation of an international growth strategy for ATCO’s disaster and emergency response, camp services and operational support services offering.

    Mr. Landon joined ATCO in May 2017 as Vice President, Strategic Research & Development for ATCO Ltd. and was responsible for leading a cross-functional team dedicated to exploring geopolitical, societal, technological and environmental trends impacting the business now and in the future.

    Mr. Landon retired from the British Army in May 2017 after a successful 28-year career having reached the rank of Colonel. Commissioned into the Royal Regiment of Fusiliers, he served as a commander and staff officer in the UK and overseas including operational tours in Northern Ireland, Bosnia, Kosovo, Sierra Leone, Iraq and Afghanistan. He was Commander of the British Army Training Unit in Suffield in Alberta from 2012 to 2015 before completing a final operational tour in Afghanistan in 2016.

    Mr. Landon is a Chartered Manager and was made a Member of the Order of the British Empire by Her Majesty the Queen in 2004. In 2017, he was the recipient of the US Bronze Star and NATO Meritorious Service Medal as Commander of a US Task Force in SE Afghanistan.

    Mr. Landon was educated at the Royal Military Academy Sandhurst and has a Bachelor’s degree in Law and a Masters in International Liaison and Communication.

  • George J. Lidgett, Executive Vice President & General Manager, Utilities
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    George J. Lidgett

    Executive Vice President & General Manager, Utilities 


    George Lidgett is the Executive Vice President & General Manager, Utilities for Canadian Utilities Limited, an ATCO company.  Mr. Lidgett oversees the operations of Canadian Utilities’ natural gas and electric utilities in Alberta and Canada’s North.  Canadian Utilities’ electric and natural gas utilities businesses are well known for their world-class operating and customer service performance.  Mr. Lidgett is continuing to build upon their long track record of operational and regulatory excellence, delivering superior value to customers, creating value for share owners, and ensuring the safety of employees, customers and communities. 

    Mr. Lidgett joined Canadian Utilities in 1985 as an engineer with ATCO Gas.  He has since held leadership positions across ATCO, including as President, ATCO Structures & Logistics.  He was most recently Managing Director, Pipelines & Liquids Global Business Unit. 

    George was born and raised in Grande Prairie, Alberta.  He graduated from the University of Alberta in 1985 with a Bachelor of Science 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.  He is currently a Director of the Arctic Institute of North America. 

  • Bob J. Myles, Executive Vice President, Corporate Development




    Bob Myles is currently the Executive Vice President, Corporate Development. 

    As Executive Vice President, Mr. Myles is responsible for growing the company’s footprint in strategic global markets, the ongoing operations of Canadian Utilities’ non-regulated businesses in Canada and Latin America, and for Government and Indigenous Relations.

    For over 25 years, Mr. Myles career has focused on the Canadian industrial sector in oil and gas, power and midstream markets. Most recently, he was the Chief Operating Officer of Stuart Olson Industrial Group where he led the operations since January 2016. Prior to joining Stuart Olson, Mr. Myles held a number of executive roles, including President and CEO of Tartan Canada Corporation; Managing Director of Energy at ATCO; Senior Vice President, Corporate Development at ATCO; President of ATCO Pipelines; and President of ATCO Energy Solutions.

    Mr. Myles is a past member of the board of directors of Alberta WaterSMART, a past Director and Chairman of the Canadian Energy Pipelines Association, and a past Director of both the Petroleum Joint Venture Association and the Canadian Gas Processors Association.

    Mr. Myles holds a Bachelor of Engineering degree in Mechanical Engineering, as well as a Bachelor of Science degree in Mathematics.

  • Wayne K. Stensby, Executive Vice President, Puerto Rico
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    Wayne K. Stensby

    Executive Vice President, Puerto Rico


    Wayne Stensby is Executive Vice President, Puerto Rico. 

    In his role as Executive Vice President, Puerto Rico, Mr. Stensby is the President & CEO, LUMA Energy, a newly-formed company owned 50 per cent by Canadian Utilities Limited, an ATCO company, and 50 per cent by Quanta Services. LUMA will transform and operate Puerto Rico’s electric transmission and distribution system over a term of 15 years.

    Mr. Stensby joined ATCO in 1988 and has held a variety of leadership positions, including assignments in Canada, the U.K. and Australia. Most recently, in mid-2019, Mr. Stensby was appointed Executive Vice President, Corporate Development, where he was responsible for the growth of Canadian Utilities’ global portfolio of investments in premier energy infrastructure. In his Corporate Development role, he led the completion of the company’s Canadian fossil-fuel generation business divestiture, as well as the early completion and subsequent sale of Alberta PowerLine. Mr. Stensby initiated both strategic activities while in his previous role as Managing Director, Electricity, which he had held from 2015. Prior to this, he led ATCO’s Australian operations as Managing Director & Chief Operating Officer of ATCO Australia.

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

  • Marshall F. Wilmot, President, Retail & Chief Digital Officer
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    Marshall F. Wilmot

    President, Retail & Chief Digital Officer


    Marshall Wilmot is President, ATCOenergy, and Chief Digital Officer for ATCO. In his dual role, Mr. Wilmot 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’s retail arm providing electricity and natural gas to 九游会官方在线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. Wilmot 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. Wilmot is transforming ATCO’s digital landscape and optimizing the company’s nascent e-commerce platform to deliver a strong brand, drive significant growth and increase revenue.

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