O’Melveny Worldwide

L. Nicole Allan is a litigation associate in O’Melveny’s San Francisco office. She represents clients at trial and on appeal, including at the Supreme Court, focusing on cases that raise novel or complex legal issues. She has experience with the False Claims Act, administrative law, white-collar defense, and criminal procedure, among other issues. Nicole maintains an active pro bono docket focused on appellate criminal defense, voting rights, and immigration.

Prior to joining O’Melveny, Nicole worked as an associate at a major litigation boutique firm, and as an editor and writer at The Atlantic and The California Sunday Magazine. She served as a law clerk for the Honorable Jon S. Tigar of the US District Court for the Northern District of California. At Stanford Law School, Nicole worked in the Supreme Court Litigation Clinic and earned Best Team, Best Brief, and Best Oralist in the Kirkwood Moot Court Competition.


Bar Admissions

  • California

Court Admissions

  • US Supreme Court
  • US District Court, Eastern and Northern Districts of California
  • US Court of Appeals, Third and Fourth Circuit


  • Stanford Law School, J.D.: Stanford Supreme Court Litigation Clinic; Kirkwood Moot Court Competition, 2017 Best Team, Best Brief, and Best Oralist
  • Yale University, B.A., English

Professional Activities


  • The Honorable Jon S. Tigar, US District Court, Northern District of California