Ranking tables
Energy: Oil & Gas (Regulatory) | Canada
Nationwide - Canada
Rankings overview for Lawyers
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English (GB)
Bernard Roth Dentons Canada LLP10 Years Ranked
Dennis Langen Stikeman Elliott LLP10 Years Ranked
Lars H Olthafer Blake, Cassels & Graydon LLP11 Years Ranked
Laura Estep Dentons Canada LLP10 Years Ranked
Martin Ignasiak Bennett Jones LLP11 Years Ranked
Sander Duncanson Osler, Hoskin & Harcourt LLP8 Years Ranked
Terri-Lee Oleniuk Blake, Cassels & Graydon LLP9 Years Ranked
All Lawyers profiles
Senior Statespeople
S Randall W Block KC
Borden Ladner Gervais LLP | Energy: Oil & Gas (Regulatory)2026 | Senior Statespeople | 11 Years RankedRandall Block KC maintains a highly respected litigation practice, which sees him act on regulatory matters within the oil and gas space. Based in Calgary, he frequently represents major energy clients before the Canada Energy Regulator in proceedings and disputes relating to construction, supply and environmental damages.
Band 1
1 Bernard Roth
Dentons Canada LLP | Energy: Oil & Gas (Regulatory)2026 | Band 1 | 10 Years RankedCalgary-based Bernard Roth represents significant oil and gas clients before federal and provincial energy regulators in a wide array of mandates, including oil sands development and service agreements.1 Dennis Langen
Stikeman Elliott LLP | Energy: Oil & Gas (Regulatory)2026 | Band 1 | 10 Years RankedHighlighted for his background in engineering, Dennis Langen routinely appears before regulators on oil and gas proceedings at the provincial and federal levels.
1 Lars H Olthafer
Blake, Cassels & Graydon LLP | Energy: Oil & Gas (Regulatory)2026 | Band 1 | 11 Years RankedLars Olthafer represents clients before energy regulators, demonstrating particular strength in land law matters arising from pipeline and project development. Utilising his background in engineering, the Calgary-based lawyer ably advises on a wide range of regulatory mandates arising from the oil and gas sector, including environmental compliance and First Nations consultation.1 Laura EstepDentons Canada LLP | Energy: Oil & Gas (Regulatory)2026 | Band 1 | 10 Years RankedLaura Estep frequently appears before the Canada Energy Regulator and Alberta Utilities Commission, advising oil and gas clients on facilities applications and disputes. She is based out of Calgary.1 Martin Ignasiak
Bennett Jones LLP | Energy: Oil & Gas (Regulatory)2026 | Band 1 | 11 Years RankedCalgary-based Martin Ignasiak has significant expertise advising oil and gas clients on regulatory matters relating to pipelines and oil sands projects, offering additional strength in environmental and Aboriginal law.1 Sander Duncanson
Osler, Hoskin & Harcourt LLP | Energy: Oil & Gas (Regulatory)2026 | Band 1 | 8 Years RankedBased in Calgary, Sander Duncanson is noted for his robust oil and gas regulation practice, representing oil and gas clients before national and provincial regulators in facilities applications and environmental assessments.1 Terri-Lee OleniukBlake, Cassels & Graydon LLP | Energy: Oil & Gas (Regulatory)2026 | Band 1 | 9 Years RankedTerri-Lee Oleniuk advises oil and gas sector clients on regulatory compliance, as well as on environmental and Aboriginal law, from her base in Calgary.
Band 2
2 Alan Ross KCBorden Ladner Gervais LLP | Energy: Oil & Gas (Regulatory)2026 | Band 2 | 9 Years RankedAlan Ross KC is well regarded for his representation across provincial and federal regulatory mandates. He is particularly well versed in handling issues in the midstream sector and those pertaining to natural gas.
2 Brad GilmourOsler, Hoskin & Harcourt LLP | Energy: Oil & Gas (Regulatory)2026 | Band 2 | 11 Years RankedBrad Gilmour provides expertise in energy and environmental regulation, covering matters including facilities applications and compliance. He acts on behalf of private and public organisations out of the firm's Calgary office.
2 Katie SlippBlake, Cassels & Graydon LLP | Energy: Oil & Gas (Regulatory)2026 | Band 2 | 7 Years RankedBased out of Calgary, Katie Slipp has a growing reputation for her counsel on regulatory proceedings and compliance matters in the oil and gas space.
Band 3
3 Jeremy Barretto
Cassels Brock & Blackwell LLP | Energy: Oil & Gas (Regulatory)2026 | Band 3 | 4 Years RankedJeremy Barretto of Cassels Brock & Blackwell LLP has a robust reputation for his regulatory and indigenous law practice, advising a number of major oil and gas clients on compliance and administrative challenges.
Up and Coming
U Alastair MacKinnon
Lawson Lundell LLP | Energy: Oil & Gas (Regulatory)2026 | Up and Coming | 1 Years RankedAlastair MacKinnon represents major energy clients on tolling disputes and judicial review proceedings, amongst other matters. He is based in Calgary.
U Dan CollinsDentons Canada LLP | Energy: Oil & Gas (Regulatory)2026 | Up and Coming | 1 Years RankedCalgary-based Dan Collins has particular focus on regulatory work for a strong portfolio of oil and gas clients, including related to significant projects.
U Sean AssiéBennett Jones LLP | Energy: Oil & Gas (Regulatory)2026 | Up and Coming | 3 Years RankedSean Assié enjoys a burgeoning profile for his regulatory practice, with clients turning to him for his expertise in issues including rate setting, indigenous law and environmental work.
U Tim MyersBennett Jones LLP | Energy: Oil & Gas (Regulatory)2026 | Up and Coming | 1 Years RankedTim Myers is an up-and-coming energy lawyer, often representing major energy clients before regulators. He is based in Calgary.