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Terri-Lee Oleniuk
Lawyers profile
Canada 2026
Lawyers profile | Canada 2026: Energy: Oil & Gas (Regulatory), Energy: Power (Regulatory), Aboriginal Law, Environment
Terri-Lee Oleniuk
Ranked in 4 Practice Areas
1

Band 1

Energy: Oil & Gas (Regulatory)

Nationwide - Canada

9 Years Ranked

2

Band 2

Energy: Power (Regulatory)

Nationwide - Canada

5 Years Ranked

4

Band 4

Aboriginal Law

Nationwide - Canada

1 Years Ranked

4

Band 4

Environment

Nationwide - Canada

4 Years Ranked

Ranked in Guides
Global 2025

About

Provided by Terri-Lee Oleniuk

Canada

Practice Areas

Terri-Lee’s practice focuses on project-related issues in natural-resource development, specializing in regulatory, environmental, and Aboriginal law. She assists companies in environmental assessments and regulatory proceedings to secure approvals for major developments in the oil and gas, pipeline, mining (metal, potash, and diamond), natural-gas processing, petrochemical, electricity transmission, hydro, solar, wind, and energy storage sectors. Terri-Lee frequently advises on and negotiates agreements with Indigenous groups. She also represents clients before administrative tribunals in matters such as tolls and tariffs proceedings, regulatory investigations, and inquiries. Additionally, she provides strategic advice on ESG matters. Terri-Lee has appeared before the Canada Energy Regulator, Alberta Energy Regulator, Alberta Utilities Commission, Alberta Land and Property Rights Tribunal, British Columbia Utilities Commission, Alberta Natural Resources Conservation Board, Mackenzie Valley Environmental Impact Review Board, Mackenzie Valley Land and Water Board, and federal-provincial joint review panels for environmental assessment proceedings.

Chambers Review

Provided by Chambers

Chambers Canada Guide

Energy: Oil & Gas (Regulatory) - Nationwide - Canada

1
Band 1
Individual Editorial
Terri-Lee Oleniuk advises oil and gas sector clients on regulatory compliance, as well as on environmental and Aboriginal law, from her base in Calgary.
View ranking table

Energy: Power (Regulatory) - Nationwide - Canada

2
Band 2
Individual Editorial

Calgary-based Terri-Lee Oleniuk is sought out for her counsel on the regulatory aspects of renewable project developments, appearing before the Alberta Utilities Commission regarding project applications and regulatory disputes. She is the co-lead of the Blake, Cassels & Graydon's National energy regulatory group.

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Aboriginal Law - Nationwide - Canada

4
Band 4
Individual Editorial

Terri-Lee Oleniuk is based in the firm's Calgary office and focuses her practice on regulatory, environmental and Indigenous law issues involving major energy projects.

Learn more about this team❖View ranking table

Environment - Nationwide - Canada

4
Band 4
Individual Editorial

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.

Learn more about this team❖View ranking table

Strengths

Provided by Chambers

Terri-lee has very good judgement and provides excellent, well thought out advice to help clients make good decisions.

Energy: Oil & Gas (Regulatory) respondent
Chambers Canada Guide

She knows everything.

Energy: Oil & Gas (Regulatory) respondent
Chambers Canada Guide

She is one-of-a-kind. I am not aware of another lawyer in the regulatory space in Canada with her level of expertise, experience and results delivered to the market.

Energy: Oil & Gas (Regulatory) respondent
Chambers Canada Guide

Terri-Lee's understanding of oil and gas regulatory matters is top end. Her understanding of our organisation and assets is excellent.

Energy: Oil & Gas (Regulatory) respondent
Chambers Canada Guide

She is great, very client service-oriented, super smart and practical when it comes to environmental and regulatory law.

Energy: Power (Regulatory) respondent
Chambers Canada Guide

She is very experienced and knowledgeable on the regulatory framework in Alberta, which is constantly evolving.

Energy: Power (Regulatory) respondent
Chambers Canada Guide

My experience with Terri-Lee has been great. She is very responsive and succinct in her responses. Terri-lee also has very good judgement and provides excellent, well thought-out advice.

Aboriginal Law respondent
Chambers Canada Guide

Terri-Lee is very experienced and knowledgeable on the regulatory framework in Alberta, which is constantly evolving. She has great contacts with the regulators and creative ideas to resolve issues.

Environment respondent
Chambers Canada Guide

Terri-Lee is great. She is very client service-oriented, super smart and practical when it comes to environmental and regulatory law.

Environment respondent
Chambers Canada Guide

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