Lezlie Madden


Lezlie Madden focuses her practice on commercial litigation matters and has significant experience in a variety of areas, including antitrust, securities and class action litigation, corporate investigations, and intellectual property disputes at the district and appellate court levels. She has represented, among others, financial services companies, private equity firms, hedge funds and health care companies in matters arising under the federal antitrust and securities laws and in complex commercial litigation as well as represented individuals before federal and state agencies. Her practice has involved conducting internal investigations for corporate clients; MDL litigation; managing pre-trial discovery and motion practice; assisting clients in implementing corporate compliance programs; representing clients in domestic arbitrations; and state and federal appellate briefing and oral argument.

Prior to joining the firm, Lezlie completed two clerkships, serving as a law clerk to the Honorable P. Kevin Castel of the U.S. District Court for the Southern District of New York from 2006-2007, and as a law clerk to the Honorable Kent A. Jordan of the U.S. Court of Appeals for the 3rd Circuit from 2008-2009. Lezlie also practiced as a litigation associate with Cravath, Swaine & Moore LLP.

Lezlie earned her law degree magna cum laude from Fordham University School of Law in 2006. At Fordham, she served as a member of the Fordham Law Review and an editor on the Moot Court Board.



Cozen O’Connor Elects 20 Associates to Membership

March 27, 2013

Ian Blum, Alphonso Collins, Kathryn Crary, Lynnette Espy-Williams, Elizabeth Featherman, Matthew Glazer, Nelsy Gomez, Andrea Hammel, Keenya Harrold, Charles Jesuit, Jr., Lezlie Madden, Marilyn Neiman, Tracey Nguyen, Cartherine Rosato Reilly, Megan Scheib, Daniel Schuch, John Schwartz, Shari Shapiro, Marko Stamenkovic, and Norasha Williams have been elected to membership in the firm.


3rd Circuit Case Illustrates Certification Procedure's Efficiency [The Legal Intelligencer]

July 09, 2010

3rd Circuit Case Illustrates Certification Procedure's Efficiency - The Legal Intelligencer - Recently, the 3rd U.S. Circuit Court of Appeals invoked the little used procedure of “certification” of questions to the state Supreme Court to clarify an important issue of state law. The use of the certification procedure had the dual effect of providing the court and parties to the action an efficient method for resolution of pivotal and undecided state law issues while simultaneously reminding

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Who's Accountable to Whom?

November 13, 2015 - Mechanicsburg, PA

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  • Fordham University School of Law, J.D., magna cum laude, 2006
  • New York
  • Pennsylvania
  • New York Supreme Court

Honorable P. Kevin Castel, U.S. District Court -- Southern District of New York

Honorable Kent A. Jordan, U.S. Court of Appeals for the Third Circuit

  • American Bar Association
  • Federal Bar Council
  • New York State Bar Association
  • Education Law Center Board Member