• Environmental, regulatory, resources

    Sean Parker

    Provides legal advice on environmental issues, commercial transactions
    and litigation matters

Contact Sean Parker


OFFICE: Edmonton

DIRECT LINE: 780.482.9309


      Corporate Commercial Securities
      Energy, Environmental & Regulatory
      Insurance & Risk Management

      Insurance & Risk Management

LAW SCHOOL: University of Alberta

BAR ADMISSIONS: Alberta (2011)

Assistant: Gemma Abeya-Sawil

Assistant Phone: 780.482.9229

Assistant Email:

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Sean is Co-Chair of the firm’s Energy, Environmental & Regulatory Practice Group.  The time Sean spent in the environmental consulting field before becoming a lawyer has provided him with a valuable technical foundation to support his practice in environmental and regulatory law. 

Sean advises on an array of environmental management projects and commercial transactions, with a focus on brownfield redevelopment, contaminated site issues and defending regulatory enforcement actions.  He acts for a wide variety of clients including large industry players, municipalities, landowners and government departments.

In his commercial litigation practice, Sean handles a variety of matters including contaminated site litigation, construction disputes, landlord-tenant issues and professional negligence claims.


  • LL.B., University of Alberta
  • B.Sc., Environmental and Conservation Sciences, University of Alberta (with Distinction)

Professional Associations, Affiliations and Community Activities:

  • Member, Canadian Bar Association
  • Board of Directors, Environmental Law Center
  • Board of Directors, Environmental Services Association of Alberta

Sean counsels and represents large industrial players, municipalities, small independent operators and individual landowners on various environmental law and regulatory issues. Some representative examples include:

  • Acted for an individual and corporate vendor of real estate and successfully defended a claim for alleged losses flowing from the sale of a parcel of contaminated land. Issues related to disclosure of environmental conditions of the land pre-sale and the purchaser’s lack of due diligence.
  • Advised a large industrial services company when conducting due diligence in relation to the purchase of several properties with potential environmental liabilities.  This matter required analysis of various technical environmental reports, assessment of the risk associated with the proposed transaction and developing strategies to manage the risk to our client.
  • Represents and advises an individual, and their related corporations, when dealing with environmental regulators enforcing administrative orders against them. This matter involves strategic planning when engaging the regulators in discussions and making submissions to the Environmental Appeals Board. The terms of the order have been amended significantly to allow for business operations to continue while the order is being fulfilled.
  • Acted as defence counsel for a large energy company prosecuted for alleged environmental offences. Due to the complexity of the engineering issues involved, expert consultants were identified and retained to refute the prosecution’s theory of the case and defend the charges laid.
  • Counseled a coal mining company dealing with regulators and other stakeholders in order to obtain the required permits and operating approvals. This matter involved identification of a wide range of legislative and regulatory requirements and working with the client to ensure that the same were satisfied. This matter also involved navigating the new alternative dispute resolution process administered by the Alberta Energy Regulator to resolve concerns raised by several stakeholders.
  • Provides ongoing advice to a government department on the development and maintenance of its environmental management system. This advice includes an annual review of the department’s environmental management system, undertaken in conjunction with a comprehensive review of all potentially applicable federal and provincial environmental legislation.
  • Acted as counsel to an administrative tribunal during appeal proceedings between government regulators and an energy company relating to denial of a proposed resource development project.  This matter was classified by the tribunal as a complex appeal due to nature of the issues and novel procedural considerations that arose. A number of precedent-setting decisions, many relating to procedural issues, were made by the tribunal in the course of hearing this matter.


  • Defended claims against an engineering firm for alleged negligent delivery of professional services.  We successfully extracted the client from the litigation an early stage and at minimal cost.
  • Acted for a large power producer in a complex commercial arbitration. This matter required assessing a broad array of issues and defending wide range of allegations. The highly technical nature of the issues required extensive efforts to review enormous volumes of documents and develop analyses in conjunction with world-leading engineering experts.
  • Represent a land developer in a large civil action against the government for damages resulting from mismanagement of the regulatory permitting process required for the brownfield development to proceed. In addition to the civil claim, we represent the developer in related administrative proceedings and judicial review actions.
  • Acted for a multinational energy company defending several lawsuits from neighbouring landowners alleging damages from historic operations of a nearby fuel dispensing outlet.  We successfully bought a summary dismissal application and had all claims against the client dismissed at an early stage of the litigation.
  • Represented a commercial landlord in a series of civil enforcement and related actions involving the seizure of millions of dollars of equipment from a delinquent tenant.  The actions included issues going to ownership and priorities of creditors.
  • Represented individuals claiming damages owed for breach of contract following the complex sale of a corporation to another party. Issues included employees of the buyer interfering with the sellers’ ability to realize earn-out portions of the sale agreement. 
  • "Environmental Law for School Authorities", McLennan Ross Webinar, 2021
  • "Leases and More: Environmental Issues For Commercial Landlords and Tenants", McLennan Ross Webinar, 2021
  • "Top 5 Things in Environmental Law Impacting Construction", The Osgoode Certificate in Construction Law - Western Canada Edition, 2021
  • "Costs and Funding for Environmental Hearings in Alberta", McLennan Ross Webinar, 2021
  • "Environmental Compliance in the COVID-19 Pandemic", Canadian Bar Association Law Series Webinar, 2020
  • “Inspections and Investigations: What to do when the regulator comes knocking?”, Environmental Services Association of Alberta, 2020
  • “Alberta’s Remediation Regulation”, Alberta Chamber of Resources, 2019
  • “Cocktails and Conversations: Contaminated Sites”, McLennan Ross Seminar, 2019
  • “Brownfields in Alberta: A Changing Legal Landscape”, Environmental Services Association of Alberta Remediation Technology Symposium, 2019
  • “A Broker’s Guide to Contaminated Sites”, McLennan Ross Seminar, 2019
  • “Environmental Law: Key Strategies for Everyday Practice”, Legal Education Society of Alberta, 2018
  • “Administrative Monetary Penalties and the Increased Use of the Economic Benefit Component”, Canadian Bar Association North, Environmental Subsection, 2017
  • “Contaminated Sites: The Real Law”, McLennan Ross Webinar, 2016
  • “Environmental Case Law Update”, Canadian Bar Association, Environmental, Energy & Resources Law-North Subsection, 2016
  • “Basics of Environmental Law”, Environmental Services Association of Alberta, Environment Business Conference, 2015
  • “Creative Sentencing for Environmental Offences”, University of Alberta, Alberta Land Institute: Land Use, 2014
  • “Environmental Consultants' Liability Risks”, McLennan Ross, 2013
  • “Basics of Environmental Law”, Environmental Services Association of Alberta, Environment Business Conference, 2012
  • “Construction Consultants’ Liability”, McLennan Ross Construction Law Symposium
  • “Environmental Law - The Civil Side”, McLennan Ross, 2012
  • “Environmental Inspections, Investigations and Enforcement”, McLennan Ross, 2012
  • “Basics of Environmental Law”, Environmental Services Association of Alberta, Environment Business Conference, 2011

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