Image: Sean Toomey
Sean Toomey
Shareholder, New Orleans
Hancock Whitney Center
701 Poydras Street
Suite 5000
New Orleans, Louisiana 70139


Sean Toomey is an experienced trial lawyer who represents clients in high-stakes civil and criminal proceedings, as well as internal and government investigations.  Sean draws on his experience of over a decade in the Department of Justice as an Assistant United States Attorney in the Eastern District of Louisiana, where he focused on trying cases, arguing motions, and appearing before the Fifth Circuit Court of Appeals in high-profile cases.  

Sean also handles commercial litigation, building on his earlier years of civil practice at two international law firms in New York, NY, focused on securities, regulatory, and general commercial disputes involving a broad spectrum of legal practice, including fraud, breach of contract, breach of fiduciary duty, reinsurance, health care, as well as federal securities law.


  • Represented the United States for over ten years in federal criminal trials in the Eastern District of Louisiana
  • Represented international bank in class action regarding issuing IPO stock
  • Represented drug manufacturer in multidistrict litigation
  • Represented technology company in connection with federal investigation into the backdating of stock options
  • Represented Canadian bank under investigation by federal authorities into the market timing of mutual funds
  • Represented former CEO of medical diagnostics company in connection with federal investigation into FDA reporting requirements
  • Represented former insurance executive in connection with state investigation into umbrella insurance bid-rigging
  • Participated in mediation between an investment bank and former executive over the extinguishment of stock options
  • Argued multiple times before the United States Fifth Circuit Court of Appeals



  • The Foundation For Natural Resources and Energy Law, Member


  • New Orleans Police and Justice Foundation, Board of Directors


  • New Orleans Magazine's List of "Top Lawyers," 2019


  • "Ethics and the #MeToo Movement - Ethical and Legal Challenges," Louisiana State Bar Association Ethics and Professionalism Serminar, December 7, 2018


After Hours

“When I’m not at work, you’ll find me watching football and my young kids, usually at the same time, and when possible, getting out into the marshes and rice fields of this sportsman’s paradise I'm so lucky to live in."