The Board of Directors (the “Board”) is responsible for overseeing the management and the business and affairs of TriSummit Utilities and believes that good governance improves performance and benefits all Shareholders. Accordingly, the Board is committed to a high standard of governance. The responsibilities of the Board and each of its committees are set out in written mandates and other key governance documents. For the key governance documents, Governance Documents.


Board of Directors

 David W. Cornhill

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David W. Cornhill, MBA, LL.D (Hon)
Chair of the Board of Directors, Independent Director

Mr. Cornhill is Chair of the Board of Directors. Mr. Cornhill is a founding shareholder of AltaGas Services Inc. (AltaGas Ltd.’s predecessor) and was Chair since its inception until April 1, 2019. Mr. Cornhill remains on the AltaGas Ltd. Board of Directors where he served as Chief Executive Officer from 1994 to 2016. He also served as interim Co-Chief Executive Officer from July to December 2018. Prior to AltaGas Ltd., Mr. Cornhill served in the capacities of Vice President, Finance and Administration, and Treasurer, and subsequently as President and Chief Executive Officer at Alberta & Southern Gas Co. Ltd.

Mr. Cornhill is a member of the Board of Directors of Imperial Oil Limited and a member of the Ivey Advisory Board at Western University. He holds both a Bachelor of Science (Hons.) and a Master of Business Administration from Western, and was awarded an honorary Doctor of Laws degree by Western in 2015.

 Dietz Kellmann

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Dietz Kellmann
Senior Independent Director (1)(3)

Dietz Kellmann is a business consultant and corporate director. He most recently served as the President and Chief Operating Officer of Global Remediation Technology, a British Columbia-based environmental services company, and since 2018 has been the President of DCLK Consulting Corp., which provides technical and advisory services to the utility, infrastructure and sustainable communities sectors. Dietz was Chief Development Officer and Chief Operating Officer of Corix Group of Companies from 2007 to 2018 and worked in various senior utility management roles at Terasen Inc. (now Fortis BC) in corporate development, finance and regulatory services. Dietz is currently a director of Doyon Utilities, LLC and Global Remediation Technology.

Dietz holds a Bachelor of Arts (Honours) in Economics from the University of Western Ontario, a Master of Arts in Economics from the University of Western Ontario, and a Master of Business Administration from Simon Fraser University. He is a member of the Institute of Corporate Directors.



 Gregory A. Aarssen

Gregory AarssenC 
Gregory A. Aarssen, MBA, JD
Independent Director (1)(2)

Mr. Aarssen is an entrepreneur and independent businessman. He has been the President of Aarssen Management Services Inc. since 1997. Mr. Aarssen was Co-President Gas of AltaGas Ltd. from 2010 until his retirement in 2012. During his tenure with AltaGas Ltd., he also held the roles of Vice President Corporate Affairs and Vice President Energy Management. Mr. Aarssen was the Vice President and Principal of PremStar Energy Canada Ltd. from 1996 until it was acquired by AltaGas Ltd. in 2004.

Mr. Aarssen holds a Bachelor Science (Honours) from the University of Western Ontario and a Master of Business Administration degree and Juris Doctor from the University of Windsor.

 Andrea Goertz

Demcoe Bill Web Andrea Goertz
Independent Director (1)(2)(3)

Andrea is the former Chief Communications and Sustainability Officer at TELUS, leading a national team responsible for a diverse portfolio comprised of external communications, media relations, privacy, provincial government relations, real estate, corporate marketing, sponsorships, community investment, and corporate social responsibility.

Andrea’s leadership earned TELUS repeated recognition on the Dow Jones Sustainability World Index, and she was a recipient in 2012 and 2014 of WXN Canada’s Most Powerful Women: Top 100 Awards.

Andrea currently serves on the boards of Boardwalk REIT and the Calgary Airport Authority. She holds a Bachelor of Commerce degree in Finance (Distinction) and a Master of Business Administration degree, both from the University of Alberta, and is a graduate of the ICD Directors Education Program.

 Jared Green

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Jared Green, CPA, CA
President and Chief Executive Officer, Non-Independent Director (3)

Mr. Green serves as President, TriSummit Utilities Inc., with responsibility for ENSTAR Natural Gas, Pacific Northern Gas Ltd., Apex Utilities Inc., and Eastward Energy Inc., Bear Mountain Wind Park, North West Hydro, and interest in Inuvik Gas Ltd. From 2014 to 2017, he was President of ENSTAR Natural Gas Company and President of Cook Inlet Natural Gas Storage, AltaGas Ltd.’s Alaska utility and natural gas storage businesses. During his tenure Mr. Green was responsible for the financial performance, operations, construction, regulatory strategy and execution, state government relations and business development. Mr. Green joined AltaGas in 2004, serving in progressively more senior roles in the organization until assuming the role of President, Canadian Utilities, including Director of Business Development, Controller, Vice President Controller and Corporate Secretary of AltaGas Utility Group Inc., a public company, and Vice President Controller, Utilities Division, and Vice President, Controller of AltaGas Ltd. Mr. Green is a member of the board of directors for the Western Energy Institute, serving on the Executive Committee and the Audit Committee.

Mr. Green holds a Bachelor of Arts in Economics from the University of Calgary, a Bachelor of Commerce (Distinction) in Accounting from the University of Saskatchewan, and is a Chartered Professional Accountant.

 Sam Langleben

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Sam Langleben
Non-Independent Director (1)(3)

Sam Langleben is the President of Long Life Capital Inc., a strategic advisory & investing firm focused principally on energy transition related infrastructure. The firm works with long-term investors to develop and execute on value enhancing strategy across their portfolios. Prior to founding Long Life Capital, Sam worked at PSP Investments for four years on their Infrastructure Investments and Corporate Strategy teams. Prior to PSP Investments, he worked at CPP Investments for seven years on the Infrastructure and Power & Renewables investment teams, and in Power & Utilities investment banking coverage at JP Morgan Securities Inc for two years.

Sam earned a Masters in International Energy Policy Management from Columbia University’s School of International & Public Affairs, and a Bachelor of Commerce from McGill University.



 Martine Légaré

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Martine Légaré
Non-Independent Director (2)(3)

Martine Légaré is Managing Director, Head of Strategy Portfolio Management, Infrastructure Investments, at the Public Sector Pension Investment Board (PSP Investments). With over 20 years of experience in the infrastructure sector, Martine has deep industry knowledge and expertise in mergers and acquisitions, financing, and structuring of greenfield PPP projects.

Martine joined PSP in 2010 and is currently responsible for overseeing transversal activities within Infra including strategy, business planning, portfolio management and financing. She is also actively involved in the oversight of certain existing portfolio companies including as a board member.

Martine holds a Bachelor’s degree in Business Administration from École des Hautes Études Commerciales in Montréal, Canada. She is a Chartered Professional Accountant (CPA, CA) and a Certified Financial Analyst (CFA).



 Steven Biggs

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Steven Biggs
Non-Independent Director  

Steven Biggs is an Associate Portfolio Manager in the Infrastructure and Renewable Resources group at AIMCo, where he is involved in the origination, evaluation, and execution of new investments across a variety of infrastructure subsectors globally. His transaction experience within the infrastructure space has spanned several sectors, including utilities, digital infrastructure, pipelines, and other midstream assets. Steven is also involved in the asset management of several of AIMCo’s existing Infrastructure portfolio companies. He joined AIMCo in 2016.

Steven holds a Bachelor of Commerce in Accounting and a Bachelor of Arts in Economics from the University of Alberta.



 Wendy Henkelman

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Wendy Henkelman, BCom, CPA, CA
Independent Director (1)(3) 

Wendy Henkelman has extensive experience in all aspects of the finance industry. Throughout her career, she held leadership positions for major oil and gas companies, worked as Vice President of Treasury and Compliance and as an executive in charge of information technology for Penn West Exploration, and served as an executive in charge of tax and royalties at Shell Canada. Ms. Henkelman is currently a director of ATB Financial and of Postmedia Network Canada Corp. where she also chairs the Audit Committee.

Wendy has her BCom with distinction from the University of Alberta, is a CPA and CA, completed the In-Depth Income Tax program through the Chartered Professional Accountants of Canada, and completed an executive leadership program from Wharton School of Business at the University of Pennsylvania.



(1) Member of Audit Committee, chaired by Ms. Henkelman
(2) Member of Compensation and Governance Committee, chaired by Mr. Aarssen
(3) Member of Environment, Health and Safety Committee, chaired by Ms. Goertz