Department profile
Sidley Austin LLP

Environment: Litigation

USA Guide 2026 : Illinois

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Sidley Austin LLP

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About

Provided by Sidley Austin LLP

For more information on the practice, please visit the practice's page at: https://www.sidley.com/en/services/environmental/

Chambers Review

Provided by Chambers

Environment: Litigation - Illinois

What the Team is Known For

Sidley Austin LLP has an eminent environmental team advising household names on complex compliance and regulatory issues. The firm offers notable experience in EPA rulings regarding the CAA and CWA, alongside strengths advising clients on liability management. It calls upon a formidable array of trial and appellate experts to handle environmental litigation claims, including defending regulatory enforcement and wider white-collar criminal defense matters.

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Work Highlights

Provided by Chambers

  • Sidley Austin represented Sterigenics, a commercial medical product and device sterilization company, in response to a new EPA rulemaking (NESHAP), as well as relevant permitting and regulatory matters at multiple facilities across the US.

Strengths

Provided by Chambers

  • They stand out for their expertise and ability to embed in the business and incorporate risk tolerance into their guidance.

    Environment: Litigation respondentUSA

  • Sidley Austin exhibit great matter management, keeping various groups aligned and on track. They are also good at taking in and understanding extremely technical information.

    Environment: Litigation respondentUSA

  • They have invaluable experience; they know how federal environmental enforcement works from within the US Environmental Protection Agency and the US Department of Justice.

    Environment: Litigation respondentUSA

Notable Practitioners

Provided by Chambers

  • Byron Taylor
    Byron Taylor

    Byron Taylor

    Byron Taylor handles a wide range of environmental matters, including regulatory issues, transactional work and disputes. He is particularly known for his knowledge and experience handling complex air quality issues.

    • Byron is brilliant; he is strategic and smart and able to focus on the main issues.

      Environment: Litigation respondentUSA

    • He has a vast amount of experience in environmental issues and offers a five-star service.

      Environment: Litigation respondentUSA

    • He is a terrific air lawyer.

      Environment: Litigation respondentUSA
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  • Hannah Posen
    Hannah Posen

    Hannah Posen

    Hannah Posen has a growing profile in the contentious environment space. Her main areas of focus include regulatory compliance, particularly relating to the CAA, as well as criminal and civil enforcement actions.

    • Hannah is outstanding.

      Environment: Litigation respondentUSA

    • Hannah is a great matter manager; she builds relationships with company personnel to ensure they have the support, guidance and resources to complete tasks.

      Environment: Litigation respondentUSA
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Ranked Individuals at Sidley Austin LLP (2)

Illinois

Members

Provided by Sidley Austin LLP

Sidley Austin LLP has rankings in the following guides

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