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Sean Toomey
Main image for Sean Toomey

SEAN TOOMEY

Shareholder

,
New Orleans
T  504.556.4118
stoomey@liskow.com
Connect with me
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Practices

  • Construction
  • Contract & Quasi-Contract Disputes
  • Shareholder Disputes & Derivative Actions
  • Director & Officer Liability
  • Education
  • Emergency & Incident Response
  • Commercial Litigation
  • Corporate
  • Criminal Defense & Government Investigations
  • Personal Injury

Blogs

  • The Energy Law Blog - Sean Toomey

Assistant

Angel Roe

504.556.4014

“Trials are about persuasion, whether trying a case to the judge or a jury. What makes persuasion more effective? In my case, after over ten years of trial work as an Assistant United States Attorney I’m able to translate complex material into simpler and more understandable arguments. And when that skill is combined with my knack for connecting with people, it leads to superior results.”

Overview

Sean Toomey is a trial lawyer, plain and simple. He represents clients in both high-stakes civil and criminal proceedings. In addition, he routinely assists clients in conducting internal investigations.  Sean draws on his over twenty years of experience, including over a decade in the Department of Justice as an Assistant United States Attorney in the Eastern District of Louisiana, where he spent countless hours in the courtroom, interrogating witnesses, and engaging with federal regulators. In addition, he is an accomplished appellate lawyer who has argued before the Fifth Circuit Court of Appeals in many high-profile cases.

Sean also handles a wide array of 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, construction law, health care, as well as federal securities law.

Notable Experience

  • Counseling companies facing regulatory scrutiny involving environmental regulations, particularly the treatment of hazardous waste
  • Representing major institutions in multi-million dollar construction litigation
  • Defending energy companies from allegations of injuries resulting from exposure to toxic materials
  • Assisting clients in complying with subpoena requests from government agencies
  • Advising college students in connection with university administrative proceedings, including Title IX investigations
  • Assisting educational institutions in conducting internal investigations regarding alleged misconduct
  • Representing banks in class action regarding issuing IPO stock
  • Representing drug manufacturers in multidistrict litigations
  • Representing technology company in connection with federal investigations regarding backdating of stock operations
  • Advising clients regarding investigations into the market timing of mutual funds
  • Representing clients in connection with FDA reporting requirements

Involvement

Professional

  • The Foundation for Natural Resources and Energy Law - Member

Community

  • New Orleans Police and Justice Foundation, Board of Directors

Recognition

  • Chambers USA – Litigation: White-Collar Crime & Government Investigations, 2024
  • Louisiana Super Lawyers, 2025
  • New Orleans Magazine's List of "Top Lawyers," 2019, 2022

Credentials

Education

  • Tulane University Law School (J.D., magna cum laude, 2001)
    • Order of the Coif
    • Tulane Law Review, Notes and Comments Editor
  • College of the Holy Cross (B.A., 1990)

Bar Admissions

  • Louisiana, 2014
  • South Carolina, 2016
  • New York, 2001

Presentations

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

Publications

  • "EPA Issues Civil-Criminal Enforcement Coordination Policy, Changing Approach to How It Handles Collaboration Between the Two Offices," Liskow's The Energy Law Blog, May 2, 2024
  • "A New DOJ Policy Provides Significant Benefits for Self-Disclosing Misconduct," Liskow's Gulf Coast Business Law Blog, March 7, 2023
  • "The Fifth Circuit Rejects the DOJ’s Attempt to Charge Black Elk Contractors with OCSLA Felonies," Liskow's The Energy Law Blog, September 29, 2017
  • "False Claims Act Relators Be Warned: Rule 54’s Taxable Costs Award Lies Ahead for the Overeager Relator," Liskow's The Energy Law Blog, September 20, 2017
  • "The Fifth Circuit’s Decision in In Re: DePuy Orthopaedics, Inc., et al, Illustrates the Possibility that Even When You Lose a Writ of Mandamus, You May Still Win, " Liskow's The Energy Law Blog, September 8, 2017
  • "U.S. Supreme Court’s Decision Not to Take Certiorari in United States v. DeCoster is a Reminder to the Food and Drug Industries to be Mindful of the Park Doctrine," Liskow's The Energy Law Blog, August 8, 2017
  • "Obstruction of Justice: Nexus Requirement Unclear in New Statutes," co-author, 230 N.Y.L.J. 7, 2003
  • "A Survey of Recent Statutory Developments in Securities Law Prosecution," co-author, ABA-CLE White Collar Crime, 2003
  • "Application of Delaware’s ‘Raincoat’ Provision," co-author, 227 N.Y.L.J. 5, 2002
  • "O’Regan v. Preferred Enterprises, Inc.: Are Occupational Diseases That are Contracted Within the First Twelve Months of Employment Presumptively Torts?," 75 Tul. L. Rev. 241, 2000

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."

WHAT’S TRENDING WITH Sean

  • News
    05.06.25
    59 Liskow Lawyers Selected to 2025 Louisiana Super Lawyers, Rising Stars
    less than a minute
  • News
    06.06.24
    Twenty-Seven Liskow Lawyers, Ten Practice Areas Recognized in Chambers USA
    less than a minute
  • Blogs
    05.02.24
    EPA Issues Civil-Criminal Enforcement Coordination Policy, Changing Approach to How It Handles Collaboration Between the Two Offices
    4 minute read
  • Blogs
    03.07.23
    A New DOJ Policy Provides Significant Benefits for Self-Disclosing Misconduct
    3 minute read
  • News
    11.07.19
    Forty-Two New Orleans Liskow Lawyers Named “Top Lawyer” by New Orleans Magazine
    2 minute read
  • News
    11.09.18
    Thirty-Eight New Orleans Liskow Lawyers Named “Top Lawyer” by New Orleans Magazine
    2 minute read
  • News
    10.30.17
    Liskow Lawyer Sean Toomey Recognized as One to Watch in Law
    less than a minute
  • Insights
    09.20.17
    False Claims Act Relators Be Warned: Rule 54’s Taxable Costs Award Lies Ahead for the Overeager Relator
    less than a minute
  • Insights
    09.08.17
    The Fifth Circuit’s Decision in In Re: DePuy Orthopaedics, Inc., et al, Illustrates the Possibility that Even When You Lose a Writ of Mandamus, You May Still Win
    less than a minute
  • Insights
    08.08.17
    U.S. Supreme Court’s Decision Not to Take Certiorari in United States v. DeCoster is a Reminder to the Food and Drug Industries to be Mindful of the Park Doctrine
    less than a minute
View All
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