Jeff Tsai represents companies in complex civil and criminal enforcement matters brought by state and federal regulators. As co-chair of DLA Piper’s State Attorneys General practice, he helps lead the firm’s efforts nationally in representing companies subject to investigative scrutiny by individual and multistate attorneys general.


Jeff's state attorneys general practice focuses on investigations and enforcement actions on issues that range from consumer protection (unfair/deceptive trade practices) to antitrust to healthcare. His representations include companies in many of the industries that have been the subject of recent state attorney general enforcement, including e-commerce, fintech, daily fantasy sports, travel/hospitality and online higher education. He has been nationally recognized as a leading state attorneys general practitioner by Chambers and Partners.

Jeff also actively defends white-collar matters in investigations and trials, including representations involving trade secret theft and economic espionage, complex frauds, and public corruption. He has tried more than 20 federal trials, including the prosecution of former US Senator John Edwards for violations of federal campaign finance laws in connection with his 2008 primary campaign for president and another prosecution that became the subject of a non-fiction book and television documentary program. Jeff recently served as first-chair counsel in one of the few federal criminal trade secret prosecutions to proceed to trial in the United States.

Jeff brings to the table years of experience in federal and state government. His most recent service was as special assistant attorney general of California, in which he was the principal advisor to former Attorney General Kamala D. Harris on policy issues related to criminal justice, corporate accountability and intellectual property enforcement and supervised high-profile enforcement actions involving California's False Claims Act, Unfair Competition Law, environmental regulations and campaign finance laws.

In the federal government, Jeff served as an assistant US attorney and deputy chief at the US Attorney's Office in Miami and senior counsel to a former Assistant US Attorney General for the Justice Department's Criminal Division. He was also a corruption trial prosecutor in the Justice Department's specialized Public Integrity Section.

Jeff is frequently called upon for legal commentary and analysis, and he has been interviewed on programs such as CNN’s Cuomo Prime Time and MSNBC Live with Katy Tur. 

He started his career as a judicial law clerk for US District Judge Vanessa D. Gilmore in Houston. Jeff received a law degree from Georgetown University and earned an undergraduate degree from the University of Texas at Austin, where he was elected student body president.