Koks, Mary W.

  Dallas, Texas, USA
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Mary has more than 26 years of experience in a practice focusing on environmental compliance and litigation. Her experience includes:

  • Representation of potentially responsible parties and landowners in environmental lawsuits including bankruptcy matters, toxic tort, property claims and suits brought under various environmental acts 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.
  • Representation of clients in administrative and civil enforcement cases before the Environmental Protection Agency (EPA), Texas Commission on Environmental Quality (TCEQ) and State Office of Administrative Hearings (SOAH).
  • Assisting and advising clients on environmental issues in real estate related transactions, corporate acquisitions and mergers, insurance claims as well as regulatory compliance, supervision of environmental compliance audits and the Spill Prevention Control and Countermeasures (SPCC) plans.

Memberships & Affiliations

  • American Bar Association, Environment, Energy and Resources Section and Environmental Transactions and Brownfields Committee
  • Houston Bar Association, Environmental Section (Past Chair)
  • Houston Society for the Prevention of Cruelty to Animals, Board of Directors
  • Spondylitis Association of America, Member and Volunteer
  • State Bar of Texas, Environmental and Natural Resources Section (Past Chair)
  • Texas Board of Legal Specialization, Business Bankruptcy
  • University of St. Thomas — Center for Irish Studies, Board Member
  • Women’s Energy Network, Houston Chapter

Awards & Honors

  • AV® Preeminent™ Peer Review Rated, Martindale-Hubbell
  • Best Lawyers in America in Environmental Law, Woodward/White, Inc., 2007-2012
  • Environmental Super Lawyers — Business Edition and Corporate Counsel Edition, Thomson Reuters, 2009
  • Leaders in Their Field, Chambers USA, 2010 - 2011
  • Super Lawyers, Thomson Reuters, 2008-2011
  • Top Lawyers, H Texas, 2009-2010


  • Texas
  • United States District Courts for the Eastern, Northern, Southern and Western Districts of Texas
  • United States Supreme Court


  • University of Houston Law Center, Master of Laws in Energy, Environment, and Natural Resources Law
  • South Texas College of Law, Juris Doctor
  • University of South Carolina, Master of Arts in Government
  • University of South Carolina, Bachelor of Arts in Political Science

Practice Area