Jaime B. Guerrero



Jaime Guerrero is a partner and litigation lawyer with Foley & Lardner LLP. Mr. Guerrero focuses in the areas of government enforcement actions, white collar criminal defense, Foreign Corrupt Practices Act ("FCPA") investigations, accounting litigation, securities litigation, and partnership disputes. He represents companies and individuals in parallel civil and criminal proceedings initiated by regulatory and prosecuting agencies for a variety of alleged wrongdoing and business disputes. Mr. Guerrero has conducted internal investigations, in both English and Spanish, in Latin American countries and as a result, the firm’s Government Enforcement Defense & Investigations Practice has garnered recognition by Chambers USA (2014), which reported that the firm is “[p]articularly noted for its presence in providing counsel on FCPA matters to Latin American clients.”

Representative Experience

  • Representation of a company in the food industry in a criminal antitrust investigation.
  • Representation of a company in the pharmaceutical industry in FCPA internal investigations in South America.
  • Representation of an investor in a partnership dispute involving alleged accounting fraud. The representation resulted in a successful settlement on behalf of the investor.
  • Representation of an agricultural entity in an international arbitration involving alleged accounting fraud.
  • Representation of a lawyer in a month-long fraud trial brought by the United States Attorney’s Office. The firm’s representation resulted in dismissal of all counts.
  • Criminal and SEC matters involving alleged backdating of stock options.

Prior to joining Foley, Mr. Guerrero was an Assistant United States Attorney in the Criminal Division of the U.S. Attorney’s Office in Los Angeles, where he investigated and tried before juries different types of federal criminal cases. He conducted various types of investigations, many involving allegations of money laundering, using a variety of investigative tools, including Title III wiretaps, grand jury subpoenas, and undercover operations. He wrote appellate briefs and argued several times before the Ninth Circuit Court of Appeals.

Before becoming a federal prosecutor, Mr. Guerrero worked as a litigation associate at Morrison & Foerster LLP, where he litigated complex civil actions in federal and state courts. He represented an energy company in several antitrust actions in federal and state courts related to the California energy crisis. He also successfully handled a securities fraud lawsuit on behalf of a corporation against its former chief executive officer.

Before law school, Mr. Guerrero was a public accountant, successfully completing the California Certified Public Accountant Examination, and worked for several years as an auditor for Deloitte & Touche LLP. Mr. Guerrero's clients included financial institutions, pharmaceutical companies and agricultural entities.


In recognition of his work in the area of white collar criminal defense, Mr. Guerrero has been selected by his peers for inclusion in The Best Lawyers in America© (2016 and 2017).


Mr. Guerrero earned his J.D. from the University of California, Los Angeles, School of Law (1997) and his B.S. from the University of California, Berkeley, Haas Undergraduate School of Business (1991).

Mr. Guerrero served as a law clerk for the Honorable Robert J. Kelleher, United States District Judge for the Central District of California, in Los Angeles, California.

Community Engagement

Mr. Guerrero serves on the board of the Los Angeles Center for Law and Justice, a legal aid organization providing housing and family law assistance to low-income communities in East Los Angeles.


Mr. Guerrero is admitted to the California Bar.


Mr. Guerrero is fluent in spoken and written Spanish and has reviewed and analyzed Spanish-language accounting work papers in connection with his representation of clients.