Dennis P. Langen

Dennis P. Langen


Stikeman Elliott LLP

Recognized since 2015

Calgary, Alberta

Practice Areas

Administrative and Public Law

Energy Law

Energy Regulatory Law

Environmental Law

Natural Resources Law

Oil and Gas Law

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Lawyer of the Year Badge - 2022 - Environmental Law Lawyer of the Year Badge - 2020 - Administrative and Public Law Lawyer of the Year Badge - 2017 - Energy Law
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Dennis Langen is a partner in the Energy Group and leads the Energy Regulatory Team in the Calgary office. His practice focuses on the regulation of energy development, infrastructure, markets and services. Dennis assists energy industry and utility industry clients whose businesses are focused on oil and gas, electricity, district energy, renewables and hydrogen. He frequently advises clients on all aspects of federal and provincial regulation of infrastructure including environmental, engineering, operational, Indigenous, economic, market and compliance aspects.

Dennis regularly appears before the Canada Energy Regulator (CER) in respect of pipeline facility, tolling, tariff and energy export approval applications; the Alberta Utilities Commission (AUC) in respect of facility, tariff, cost of service, performance based regulation, rule-making and enforcement applications; the Alberta Energy Regulator (AER) in respect of oil and gas development, facility and resource equity applications; and the British Columbia Utilities Commission (BCUC) in respect of utility applications. He is routinely involved in review applications and appeals relating to decisions of these authorities. Dennis also regularly assists clients in navigating the nuances of energy regulation in the context of power purchase agreements, asset sales and dispositions, and in mergers and acquisitions.

As an extension of his significant energy infrastructure and market experience, Dennis advises clients in respect of hydrogen and carbon capture facilities and regulation; electricity supply and markets in the context of bitcoin mining; and in respect of federal and provincial environmental impact assessment requirements and Indigenous consultation requirements for various industrial (e.g. petro-chemical, mining and waste) and transportation (e.g. rail and aviation) developments.

A Professional Engineer with experience in the oil and gas industry, Dennis worked with a major North American pipeline operator in the areas of engineering design and construction, environment, operations and pipeline integrity. He often applies his technical knowledge in the context of regulatory applications pertaining to energy infrastructure and resource equity disputes.

Location
  • 4200 Bankers Hall West
    888 3rd Street, SW
    Calgary, AB T2P 5C5
    Canada
Languages
  • English
Bar Admissions
  • Alberta, Alberta, 2003

Stikeman Elliott LLP
Headquarters: Toronto, Ontario

190 The Best Lawyers in Canada awards

42 Best Lawyers: Ones to Watch in Canada awards

Law Firm of the Year Badge Visit Website View Firm Profile

Lawyer of the Year Badge - 2022 - Environmental Law Lawyer of the Year Badge - 2020 - Administrative and Public Law Lawyer of the Year Badge - 2017 - Energy Law
Named "Lawyer of the Year" by Best Lawyers® for:
  • Environmental Law, Calgary, Canada (2022)
  • Administrative and Public Law, Calgary, Canada (2020)
  • Energy Law, Calgary, Canada (2017)
Recognized in The Best Lawyers in Canada 2024 for work in:
  • Administrative and Public Law
  • Energy Law
  • Energy Regulatory Law
  • Environmental Law
  • Natural Resources Law
  • Oil and Gas Law

Publications

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