Juan’s practice focuses on high-risk commercial litigation, white collar investigations, and international and domestic arbitration. 

Juan has worked on a broad spectrum of significant matters. He currently represents a client in a global wire fraud and Foreign Corrupt Practices Act investigation. He is also managing a pro bono project representing unaccompanied migrant children in removal proceedings and representing a young woman seeking asylum from El Salvador.

Before attending law school, Juan was a two-time Olympic swimmer and a humanitarian worker in Sri Lanka. 


Juan’s recent representations include:

  • Representing Goldman Sachs in various litigation and regulatory matters
  • Representing Barclays in various litigation and regulatory matters
  • Representing a citizens group opposing the proposed construction of a sports arena on an unsuitable site
  • Representing the NFL in litigation against the NFL Players Association in the 2011 lockout
  • Representing First Quality Baby Products in patent litigation against Kimberly-Clark Worldwide

Publications & Presentations

Recent Development: The Protect America Act of 2007, 45 HARV. J. ON LEGIS. 581 (2008)

Co-authored, No Initial Interest Confusion in Metatags Case, Ron D. Dreben & Juan Valdivieso, World Trademark Review, Daily, July 3, 2008


  • Harvard Law School, J.D.; Harvard Journal on Legislation Co-President; Heyman Fellow
  • Princeton University, A.B., Public and International Affairs; Co-Captain of the Men's Varsity Swim Team



  • California
  • District of Columbia
  • Maryland
  • New York

Awards and Associations

American Bar Association

Government Service

Counsel, United States Senate Committee on the Judiciary


  • Hon. Lucy H. Koh, U.S. District Court: Northern District of California