Tyler Moore Kostal

Tyler Kostal is a litigator and trial attorney who represents corporate clients in high-stakes environmental and commercial disputes across Louisiana’s state and federal courts. Tyler’s practice ranges from contract disputes to wrongful death to unfair trade practice to property contamination. A partner in Kean Miller’s New Orleans office, Tyler has built a practice defined by courtroom advocacy, meticulous case strategy, and a command of the complex scientific and regulatory issues that drive modern environmental litigation.

Tyler’s practice centers on environmental and energy litigation. She defends energy companies—including Fortune 100 and Fortune 500 clients—in single-plaintiff, multi-plaintiff, class action, and multi-district litigation involving claims of soil, sediment, groundwater, drinking-water, and other types of environmental contamination arising from oil and gas exploration and production, gas processing and midstream operations, and refining activities. She brings particular depth to oilfield legacy lawsuits under Louisiana Act 312, litigating claims for alleged breaches of mineral leases, surface agreements, and the Louisiana Mineral Code. Tyler also counsels clients on regulatory matters before the Department of Energy and Natural Resources and the Louisiana Department of Environmental Quality.

Beyond contamination defense, Tyler litigates land loss lawsuits involving claims for erosion, subsidence, and alleged breaches of pipeline rights-of-way, surface leases, and the Louisiana Coastal Zone Management Act. She handles Naturally Occurring Radioactive Material (NORM) exposure and contamination cases—including personal injury, property damage, class action, and mass joinder proceedings. Her commercial litigation work extends to disputes over mineral rights, royalties, and surface ownership; Haynesville Shale litigation; contractual indemnity disputes; and oil and gas claims across a range of transactional and operational contexts. Her litigation approach is grounded in close collaboration with engineers, geologists, and other technical experts, enabling her to distill multi-faceted scientific and legal issues into clear, persuasive arguments for judges and juries alike.

Tyler is equally at home in the appellate courts. She has briefed winning writs and appeals in Louisiana’s appellate courts, the U.S. Court of Appeals for the Fifth Circuit, and the U.S. Supreme Court.

Before entering private practice, Tyler served as an Attorney Advisor to the U.S. Department of Labor, Office of Administrative Law Judges, where she assisted with legal opinions in disputes involving longshoremen and Jones Act matters. She began her professional career in marketing in Nashville, Tennessee—experience that sharpened her instinct for clear communication and audience-focused strategy.