Pamela Mascari

• Energy & Environmental Litigation

• Environmental Contamination Claims Related to Oil & Gas and Petrochemical Operations

• Environmental Regulation

• Expropriation & Condemnation

• Pharmaceutical & Medical Device Litigation

• Toxic Tort Litigation

State and federal court litigator, trial advocate, and regulatory advisor, Pam Mascari, resolves high-stakes litigation in and out of court involving a wide variety of complex environmental claims across all types of property contamination. Among her clients are energy, petrochemical, and manufacturing businesses, for whom she advises on litigation strategy and management involving the Louisiana state and federal court system and regulatory agencies. Pam also brings a proven track record of successful outcomes to resolving difficult, federal multi-district litigation proceedings inside and outside of the Louisiana courts.

Notably, Pam is among very few litigators in the state who have actually and successfully tried legacy litigation matters to conclusion. She is valued for her collaborative approach to dispute resolution and ability to serve and lead the most extensive teams of national counsel and joint defense groups – as many of her claims are complex and/or involve many moving parts.

On attack or defense, Pam is a highly pragmatic advisor to the core who believes in streamlining fact-based arguments that persuade opposing counsel, judges and juries alike to acquiesce to her client’s position. Appreciated for being easy to work with yet still a force to be reckoned with in and out of court, Pam is among the short-listed advocates other law firms select to assist them as local Louisiana litigation counsel. Pam’s relatable style makes her the regular choice of clients conduct juror research studies.

With a full appreciation of the practical, economic, and legal challenges associated with the energy industry, Pam guides a wide range of clients in realizing their business goals in an ever-changing compliance landscape. Her regulatory practice includes advocacy before the Department of Natural Resources and the Department of Environmental Quality, involving intrastate pipeline, oil and gas, and water enforcement matters.

Moreover, Pam navigates industrial clients through the complex regulatory issues associated with water, solid waste, USTs, wetlands, release reporting, incident response, and environmental permitting and enforcement. Her substantive knowledge of the law and insight into how regulators approach and address issues implicated by her clients’ activities allow her to develop an effective approach to problem-solving and advocacy that is aligned with their distinct objectives.

In addition to her flourishing practice as a litigator and regulatory advisor, Pam was invited to serve on the Advisory Council of the Mineral Law Institute at the LSU Law Center and has been appointed to the Mineral Law Committee of the Louisiana State Law Institute since 2018.

• Member, Baton Rouge Bar Association

• Member, Louisiana State Bar Association

• Member, American Bar Association

• Member, Federal Bar Association

• Member, Women’s Energy Network (Southeast Louisiana Chapter)

• Advisory Council, LSU Law Center Mineral Law Institute

• Mineral Law Committee, Louisiana State Law Institute

• 2025 Leadership Class Baton Rouge

• Representation at jury trials of major oil companies involving claims of alleged environmental property damage from exploration and production activities (legacy lawsuits) resulting in favorable defense verdicts.

• Representation of a major oil company in connection with claims of coastal erosion or land loss.

• Representation of pipeline companies in connection with claims of environmental damage to coastal zone properties.

• Representation of a pharmaceutical company in federal multi-district litigation involving allegations of injury resulting from the ingestion of phenylpropanolamine, an ingredient in appetite suppressants and decongestant products.

• Representation of an international crop science company in jury trials in federal multi-district litigation proceedings involving genetically engineered crops.

• Representation of a municipal utility company in an expropriation (condemnation) trial against a private utility resulting in favorable judgment.

• Representation of a pipeline company in a mass tort suit involving alleged exposure to asbestos-containing materials resulting in the dismissal of the plaintiff’s claims.

• Representation of intrastate pipeline companies in proceedings before the Louisiana Office of Conservation involving construction and operation permits, interconnection permits and agreements, transportation agreements, and abandonment of facilities.

• Representation of petrochemical company in litigation related to underground storage in depleted salt caverns.

• Representation of industrial clients in LDEQ enforcement proceedings and release reporting.

• Litigation, mediation, and settlement of multiple wrongful death suits for large petrochemical and manufacturing defendants.

• Representation of the energy industry in expropriation (condemnation) actions.

Hall of Fame

LSU Law Center