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314.552.6890
  • Education
    • J.D., cum laude, Washington University-St. Louis School of Law, 2017, Chief Project Editor of Washington University Journal of Law and Policy; Dean's List
    • B.A., cum laude, Tulane University, 2013, Economics, Political Science, International Development, Latin American Studies

Sean specializes in energy and environmental issues and represents companies in a range of regulatory and enforcement matters relating to land use, environmental liability, and registration for pesticide products and devices. 

On the transactional side of his practice, Sean represents public utilities, clean energy developers, large-scale energy suppliers, and private equity firms in connection with the energy development and transmission across the country. Sean routinely advises companies on federal, state and local permitting and regulatory laws that may affect elements of a development project at every stage. 

Sean also counsels companies of federal and regulatory requirements relating to environmentally sensitive products and waste. Sean helps clients understand regulatory compliance requirements under, among other laws, the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA), the Federal Food, Drug, and Cosmetic Act (FFDCA), Toxic Substances Control Act (TSCA), and California’s Prop 65. He advises companies on navigating through waste and pollution regulations and liability concerns as they relate to Resource Conservation and Recovery Act (RCRA), Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (CERCLA), Hazardous Materials Transportation Act (HMTA) the Clean Air Act, the Clean Water Act, the Endangered Species Act (ESA) and the Migratory Bird Treaty Act (MBTA).

As a litigator, Sean assists clients through all stages of business disputes and methods of dispute resolution, including litigation, mediation, and arbitration. Sean has defended industry clients in state and federal courts on matters relating to land use rights, chemical exposure, trademark law, patent licensing, and antitrust disputes, among others.

Before joining Polsinelli, Sean graduated cum laude from Washington University in St. Louis School of Law. He received the Dean’s Leadership Award for his work in promoting gender equality on campus. He was a board member of the University’s Sexual Assault Investigation Board and was on the Honor Board for the law school. Sean also assisted low-income taxpayers and environmental protection groups as a part of Washington University’s clinic programs.

Currently representing fitness equipment manufacturer in patent litigation concerning bicycle training equipment in the Unites States District Court for the Northern District of Georgia.

Currently representing wind farm developers in various state court actions relating to  land use, development and permitting of wind and solar energy facilities across the country.

Currently serving on litigation team for defendant client in In Re: Generic Pharmaceuticals Pricing Antitrust Litigation, Civil Action No. 16-MD-2724, pending in the U.S. District Court for the Eastern District of Pennsylvania.

Routinely serve as environmental and permitting counsel for development of renewable energy projects across the nation. Conducted permitting, compliance and environmental due diligence review of renewable energy projects, including wind, solar and biofuel. Clients include national investors and developers of renewable energy projects.

Advised Fortune 100 corporations on TSCA, OSHA, RCRA, FIFRA, Clean Water, and Clean Air laws.

Guided well-known chemical company facing OSHA inspection of its business.

Helped international chemical manufacturer navigate the transportation of its products by air, rail, water, and truck.

Handled environmental and health and safety due diligence for corporate mergers and acquisitions.

Defended a Fortune 100 Company in a multi-party cost recovery claim for a vapor intrusion remedy allegedly necessitated by disposal of hazardous substances at a landfill in Dayton, Ohio.

Defended a Fortune 200 in a 300-plus plaintiff action alleging property damage and emotional distress from mercury released at a mercury cell chloralkali plant. The case settled favorably after plaintiffs’ experts were excluded.