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Energy: Oil & Gas (Regulatory) | Global

Canada

The Energy: Oil & Gas (Regulatory) rankings table below has been designed to provide the most in-depth insights and reviews of the top ranked lawyers and law firms. The firms included in our rankings have been recommended by in-house counsel, other third-party experts and private practice lawyers. Our comprehensive research ensures you have all the information needed when looking to purchase legal services across Canada.

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Senior Statespeople

  1. Randall W Block KC
    S
    Randall W Block KC
    Borden Ladner Gervais LLP
    Borden Ladner Gervais LLP | Energy: Oil & Gas (Regulatory)
    2025 | Senior Statespeople | 19 Years Ranked
    Randall 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.
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1

Band 1

  1. 1
    Bernard Roth
    Dentons Canada LLP | Energy: Oil & Gas (Regulatory)
    2025 | Band 1 | 5 Years Ranked
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  2. Dennis Langen
    1
    Dennis Langen
    Stikeman Elliott LLP
    Stikeman Elliott LLP | Energy: Oil & Gas (Regulatory)
    2025 | Band 1 | 5 Years Ranked
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  3. Lars H Olthafer
    1
    Lars H Olthafer
    Blake, Cassels & Graydon LLP
    Blake, Cassels & Graydon LLP | Energy: Oil & Gas (Regulatory)
    2025 | Band 1 | 14 Years Ranked
    Lars 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.
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  4. 1
    Laura Estep
    Dentons Canada LLP | Energy: Oil & Gas (Regulatory)
    2025 | Band 1 | 5 Years Ranked
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  5. Martin Ignasiak
    1
    Martin Ignasiak
    Bennett Jones LLP
    Bennett Jones LLP | Energy: Oil & Gas (Regulatory)
    2025 | Band 1 | 7 Years Ranked
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  6. Terri-Lee Oleniuk
    1
    Terri-Lee Oleniuk
    Blake, Cassels & Graydon LLP
    Blake, Cassels & Graydon LLP | Energy: Oil & Gas (Regulatory)
    2025 | Band 1 | 5 Years Ranked

    Terri-Lee Oleniuk is typically sought out for her regulatory expertise. Her environmental practice is complemented by her knowledge of energy regulation and Aboriginal law, particularly in relation to solar projects. She is based in Calgary.

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2

Band 2

  1. Alan Ross KC
    2
    Alan Ross KC
    Borden Ladner Gervais LLP
    Borden Ladner Gervais LLP | Energy: Oil & Gas (Regulatory)
    2025 | Band 2 | 4 Years Ranked
    Alan Ross has experience representing energy clients in national and provincial regulatory proceedings. His energy practice maintains a strong focus on hydrogen, carbon capture, energy transition technologies and sustainable infrastructure.
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  2. Brad Gilmour
    2
    Brad Gilmour
    Osler, Hoskin & Harcourt LLP
    Osler, Hoskin & Harcourt LLP | Energy: Oil & Gas (Regulatory)
    2025 | Band 2 | 14 Years Ranked
    Based in Calgary, Brad Gilmour is well known for his experience in the environmental space, having guided a number of clients through investigations and site remediations.
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  3. Jeremy Barretto
    2
    Jeremy Barretto
    Cassels Brock & Blackwell LLP
    Cassels Brock & Blackwell LLP | Energy: Oil & Gas (Regulatory)
    2025 | Band 2 | 2 Years Ranked
    Jeremy 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.
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  4. Katie Slipp
    2
    Katie Slipp
    Blake, Cassels & Graydon LLP
    Blake, Cassels & Graydon LLP | Energy: Oil & Gas (Regulatory)
    2025 | Band 2 | 2 Years Ranked
    Based out of Calgary, Katie Slipp has a growing reputation for her counsel on regulatory proceedings and compliance matters in the oil and gas space.
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  5. Sander Duncanson
    2
    Sander Duncanson
    Osler, Hoskin & Harcourt LLP
    Osler, Hoskin & Harcourt LLP | Energy: Oil & Gas (Regulatory)
    2025 | Band 2 | 4 Years Ranked
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