Sean McMahon is an associate in the New York office of Latham & Watkins and a member of the Litigation & Trial Department.

Mr. McMahon represents companies and individuals in government investigations and disputes involving securities law and complex commercial matters. He also has an active pro bono practice focusing on immigration matters.

Mr. McMahon received his BA, cum laude, from Boston College in 2009 and his JD from Columbia Law School in 2013, where he was a Harlan Fiske Stone Scholar. While at Columbia, Mr. McMahon was a notes editor for the Columbia Law Review. Between 2015 and 2016, Mr. McMahon served as a law clerk to Judge Mark G. Mastroianni of the United States District Court for the District of Massachusetts. 

Mr. McMahon is a member of the New York bar and he is admitted to practice before the United States District Courts for the Southern and Eastern Districts of New York.

Bar Qualification

  • New York


  • JD, Columbia Law School, 2013
    Harlan Fiske Stone Scholar
  • BA, Boston College, 2009
    cum laude