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Terrence K. Knister

201 St. Charles Avenue
Suite 4000
New Orleans, Louisiana 70170-4000

504.569.1865 (direct line)
504.582.1121 (fax)

Virtual Business Card
University of Mississippi Law Center, J.D., 1981
University of Mississippi, B.P.A., 1978
Bar Admissions
Louisiana (1981)
Mississippi (1981)
Practice Areas

Terry Knister has more than 30 years of litigation experience in bench and jury trials as well as appeals. His practice focuses on energy, environmental and toxic tort litigation and has defended individual, mass tort and class action lawsuits. He is listed in Best Lawyers - The World’s Premiere Guide under the category “Environmental Law – Litigation”.  

For over a decade, Terry has defended oil and gas companies in numerous “legacy” lawsuits asserting environmental damage involving claims typically in the hundreds of millions of dollars.   Terry's focus is developing trial strategy for these cases that includes formulating concise discovery for obtaining the most information for the least cost.   He is intently involved in selecting key expert and fact witnesses and preparing them for effective testimony at deposition and trial.   Where actual environmental damage has occurred, Terry is involved in advising the client with respect to any remediation program required as part of the settlement. 

Terry has also been involved with the immediate response to emergency situations while they are occurring. These situations have involved oil and gas pipeline ruptures, oil and gas well blowouts, chemical railroad car explosions and derailments.  In these emergency situations, Terry has been involved in the immediate identification of potential hazards, notification of all potentially interested regulatory agencies and potential damage control with regards to the immediate effect of the emergency situation to human health, wildlife and the environment.  A key issue in these emergency situations is the identification and involvement of expert witnesses on an expedited basis.

Terry has frequently been invited to write and speak on environmental issues. Terry has been an invited speaker at the Louisiana State Bar Association’s Environmental Litigation seminar and has previously spoken at legal programs sponsored by the Association of Corporate Counsel, Defense Research Institute, corporations and insurance companies in the areas of environmental and toxic tort litigation, class actions, mass torts and case management. Terry also co-authored The Best Repellent For The Class Action Mosquito, published in Vol. I., Issue 1, American Bar Association Mass Torts Litigation Committee Newsletter.  

Terry has served as lead counsel in numerous lawsuits involving allegations of historic and ongoing oil and gas production activities (“legacy” litigation), personal injury, property devaluation/damage, and remediation as a result of hydrocarbon and chemical releases, hazardous materials such as Naturally Occurring Radioactive Material (NORM), asbestos, asbestos containing materials, silica, lead, ethylene dichloride, nitrogen tetroxide and pesticides.  A number of these matters have included thousands of plaintiffs seeking extensive monetary damages in both class action and mass tort cases.  

Terry’s experience has also included in-depth experience in cases involving admiralty, maritime personal injury, OSHA, workers' compensation, products liability, premises liability, redhibition and individual chemical exposure.

In addition to being admitted to practice before all state and federal courts in Louisiana and Mississippi, Terry is also admitted to practice in the U.S. Supreme Court, the U. S. Court of Appeals for the Fifth Circuit, the U. S. District Court for the Southern District of Texas and has been admitted on a pro hac vice basis in courts in Texas, Illinois and California.  He has dealt with state and federal regulatory agencies, including the Louisiana Department of Environmental Quality, Louisiana Department of Natural Resources, Louisiana State Police, Louisiana Department of Wildlife and Fisheries, Texas Railroad Commission, Bureau of Safety and Environmental Enforcement, U.S. Coast Guard, Environmental Protection Agency, U.S. Fish and Wildlife Service, U.S. Department of Labor - Occupational Safety and Health Review Commission and the Occupational Safety and Health Administration.

Representative Matters:

  • Defense of numerous lawsuits by landowners and public entities alleging environmental damage arising from historic and ongoing oil and gas exploration and production activities
  • Has served as lead counsel in lawsuits involving environmental damage to real property and personal injuries, including mass torts and class actions
  • In one of those lawsuits, was lead counsel in a three month trial involving alleged personal injuries from a chemical explosion and release that resulted in a jury verdict of no liability for defendants
  • Representing a major oil and gas company in the immediate response to an ongoing investigation by the Bureau of Safety and Environmental Enforcement and the U.S. Coast Guard due to an offshore platform blow out and fire. (One of the first major blow out and fire on a production platform since the BP Deepwater Horizon Oil Spill in 2010.)
  • Representation of a major natural gas company involving the failure of a salt dome storage cavern releasing millions of cubic feet of natural gas into water aquifers resulting in a forty-five day evacuation of nearby residents, property damage and immediate effect upon nearby federal protected wildlife and  waters.  Included in this representation was the preparation of a root cause report ordered to be prepared by the Louisiana Department of Natural Resources.  Terry also served as lead counsel at the two week trial of nearby residents claiming inconvenience, health and property damages.
  • Representation of a major chemical company in different lawsuits involving releases of hazardous chemicals or substances and allegations of personal injury and environmental harm to real property and water aquifers
  • Representing a major exploration and production company in a sale contract claim for selling a faulty offshore platform.  In related litigation, he is representing that same company in allegations of environmental damage to the Gulf of Mexico.
  • Representing an oil and gas company in an onshore oil spill that took place in Livingston Parish.
  • Serving as counsel to several oil and gas and pipeline companies in the Southeast Louisiana Flood Protection Authority-East Litigation.
  • Defense of Louisiana Department of Environmental Quality enforcement actions directed at alleged air and water violations
  • Defense of Louisiana Department of Natural Resources enforcement actions directed at alleged regulatory violations
  • Defense of Environmental Protection Agency enforcement actions directed at alleged air and water violations

Published Works & Presentations:

  • Speaker, Update on Levee Board, CZM and Wetlands Land Loss Cases... What would Ryan Lochte do? (Gordon Arata Lunch n' Learn, December 2016)
  • Speaker, Update on Levee Board, CZM and Wetlands Land Loss Cases... What would Ryan Lochte do? (Gordon Arata Annual Duck Lunch & Seminar, October 2016)
  • Panelist, Legacy, Levee Board and Coastal Zone Management or Why You Should Never Enter a Ground War in Asia (Gordon Arata Annual Duck Lunch & Seminar, October 2014)

Professional Affiliations:

  • Louisiana State Bar Association – Environmental Law Section
  • Mississippi State Bar
  • Louisiana Oil and Gas Association
  • American Bar Association - Environment, Energy and Resources Section
  • Petroleum Landman's Association of New Orleans - Member

Community Involvement: 

  • President – Hurstville Neighborhood Association


  • Louisiana Bar Foundation - Louis Moreau-Lislet Fellow
  • The Lamar Order of the Law Alumni Chapter of The University of Mississippi Alumni Association
  • AV Rated by Martindale-Hubbell
  • Best Lawyers in America - Environmental Law (Since 2010)
  • Louisiana Super Lawyers - Environmental Litigation (2011-2013, 2015-2018)
  • Listed in the A.M. Best's Directory of Recommended Insurance Attorneys

Articles Authored...
  • What To Do When OSHA Comes A Knockin'
  • What's Happened in the Rat Hole Since We Last Met
  • [Preso] The Impact of Hurricane Katrina from an Environmental Perspective

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