Photograph of Leigh Colihan


  • College of the Holy Cross, B.A. history (2011) cum laude
  • American University Washington College of Law, J.D. (2016) magna cum laude, Order of the Coif


  • District of Columbia
  • Massachusetts
Leigh Colihan, Associate Washington, D.C.
Phone: +1 202.624.2528
1001 Pennsylvania Avenue NW
Washington, DC 20004-2595

Leigh Colihan is an associate in Crowell & Moring’s Washington, D.C. office and is a member of the firm’s Antitrust and Litigation groups. Leigh is currently representing AT&T in its proposed acquisition of Time Warner. Leigh has experience in complying with the Hart-Scott-Rodino Act and demonstrating the pro-competitive benefits in a vertical merger before the Department of Justice.

Leigh received her J.D., magna cum laude, from American University Washington College of Law, where she was inducted into the Order of the Coif, and her B.A., cum laude, in history from College of the Holy Cross. While in law school, Leigh served as a note & comment editor of the American University Law Review. While a junior member of the AULR, her note on the Department of Labor’s failure to adequately protect child workers under the Fair Labor Standards Act was published.


Admitted to practice: District of Columbia, Massachusetts