Mary

W.  Koks

Shareholder
700 Milam Street, Suite 800
Houston, TX 77002

Overview

Mary joined the Firm in 2005 and has more than 40 years of experience in the environmental arena, focusing on environmental litigation, enforcement, remediation, compliance, counseling, transactional, and permitting matters.

She regularly represents clients in administrative and civil enforcement cases before the Department of Justice (DOJ), Environmental Protection Agency (EPA), Texas Commission on Environmental Quality (TCEQ), State Office of Administrative Hearings (SOAH), and other federal and state agencies. Many of Mary’s clients recognize that her strong working relationships with each of these agencies allows complicated processes to move forward more quickly.

Mary also represents potentially responsible parties and landowners in environmental lawsuits including bankruptcy matters, toxic tort, property claims, and suits brought under various environmental statutes including Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), Resource Conservation and Recovery Act (RCRA), Oil Pollution Act (OPA), Clean Water Act (CWA), Clean Air Act (CAA), and comparable state statutes. Mary is board certified in business bankruptcy and represents several large Environmental Bankruptcy Trusts set up by Debtors, the EPA, and Department of Justice to ensure that extremely contaminated properties are remediated.

In addition, she assists and advises clients on environmental issues in real estate-related transactions, corporate acquisitions and mergers, insurance claims, regulatory compliance, supervision of environmental compliance audits, annual reports, and the Spill Prevention Control and Countermeasures (SPCC) plans.

Mary’s clients appreciate that no matter how complex a situation may be, she has the ability to immediately clarify and narrow the primary deal issues so they can be adequately resolved. This, in turn, enables her to quickly address the more minor stumbling blocks in a given case. Throughout her career, Mary has developed subject matter expertise and unparalleled experience that allow her to effectively and efficiently represent major clients in their environmental affairs.

Education

Admissions

Achievements

  • American Lawyer Media – Top Rated Lawyer for Energy, Environmental and Natural Resources (2013)
  • Chambers USA – Leaders in Their Field, Environmental – Texas (2010-2012)
  • H Texas Magazine – Top Lawyers (2009-2011, 2014-2015)
  • Houstonia Magazine – Top Lawyer, Environmental (2022-2023)
  • Martindale-Hubbell® AV® Preeminent™ Peer Review Rated
  • National Diversity Council – Houston's Top 50 Women in Law (2017)
  • Texas Board of Legal Specialization, Business Bankruptcy
  • Thomson Reuters – Texas Super Lawyers (2006-2024); Texas Super Lawyers, Business Edition and Corporate Counsel Edition (2009); Texas Super Lawyers: Women's Edition (2006-2024)
  • Woodward/White, Inc. – Best Lawyers in America, “Lawyer of the Year” (2017, 2023); Best Lawyers in America, Environmental Law (2007-2025); Best Lawyers in America, Litigation – Environmental (2011-2025); Best Lawyers in America, Women in the Law (2024)
  • Memberships

    • American Bar Association, Environment, Energy, and Resources Section
    • Houston Bar Association, Environmental Section (Past Chair)
    • Houston Society for the Prevention of Cruelty to Animals (Past Board of Directors)
    • State Bar of Texas, Environmental and Natural Resources Section (Past Chair)

Overview

Mary joined the Firm in 2005 and has more than 40 years of experience in the environmental arena, focusing on environmental litigation, enforcement, remediation, compliance, counseling, transactional, and permitting matters.

She regularly represents clients in administrative and civil enforcement cases before the Department of Justice (DOJ), Environmental Protection Agency (EPA), Texas Commission on Environmental Quality (TCEQ), State Office of Administrative Hearings (SOAH), and other federal and state agencies. Many of Mary’s clients recognize that her strong working relationships with each of these agencies allows complicated processes to move forward more quickly.

Mary also represents potentially responsible parties and landowners in environmental lawsuits including bankruptcy matters, toxic tort, property claims, and suits brought under various environmental statutes including Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), Resource Conservation and Recovery Act (RCRA), Oil Pollution Act (OPA), Clean Water Act (CWA), Clean Air Act (CAA), and comparable state statutes. Mary is board certified in business bankruptcy and represents several large Environmental Bankruptcy Trusts set up by Debtors, the EPA, and Department of Justice to ensure that extremely contaminated properties are remediated.

In addition, she assists and advises clients on environmental issues in real estate-related transactions, corporate acquisitions and mergers, insurance claims, regulatory compliance, supervision of environmental compliance audits, annual reports, and the Spill Prevention Control and Countermeasures (SPCC) plans.

Mary’s clients appreciate that no matter how complex a situation may be, she has the ability to immediately clarify and narrow the primary deal issues so they can be adequately resolved. This, in turn, enables her to quickly address the more minor stumbling blocks in a given case. Throughout her career, Mary has developed subject matter expertise and unparalleled experience that allow her to effectively and efficiently represent major clients in their environmental affairs.

Experience

  • Environmental Trust

    Represented numerous environmental custodial trusts in negotiating Settlement Agreements and Environmental Trust Agreements in bankruptcies. Assisted with 

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  • Superfund

    Represents several generators at a superfund site, and also acts as Chair of the Steering Committee for the matter.

  • Superfund

    Served as Common Counsel for the cooperating parties at several superfund site in Texas. These groups are comprised of large oil and gas, chemical and manufacturing

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