Darren Lian serves as the Special Agent in Charge (SAC) of the Internal Revenue Service–Criminal Investigation (IRS-CI) Los Angeles Field Office, where he oversees operations across the Central and Southern Districts of California. He leads investigations involving criminal tax violations, cybercrime, money laundering, organized crime, narcotics trafficking, counterterrorism, and other complex financial crimes.

IRS Criminal Investigation is the nation's premier financial investigative agency and the only federal law enforcement organization with exclusive jurisdiction over criminal violations of the Internal Revenue Code. With approximately 1,800 special agents across 19 domestic field offices and 14 international offices, IRS-CI is recognized for its expertise in tracing complex financial transactions and maintaining one of the highest conviction rates in federal law enforcement.

Mr. Lian began his career with IRS-CI in 2010 as a Special Agent in Los Angeles. Throughout his tenure, he has investigated a broad spectrum of sophisticated financial crimes and earned multiple awards for investigative excellence and leadership. He has held numerous senior leadership positions, including Supervisory Special Agent in Long Beach, Assistant Special Agent in Charge of the Los Angeles Field Office, Assistant Director of IRS-CI's Data Analytics Team, leadership roles within the Nationally Coordinated Investigations Unit and Enterprise Case Management System, and Special Agent in Charge of the Oakland Field Office.

A recognized leader in financial investigations, data analytics, and cybercrime, Mr. Lian has played a key role in advancing IRS-CI's investigative capabilities through technology and intelligence-driven enforcement. Prior to joining IRS-CI, he worked in the tax consulting practice at KPMG LLP.

Mr. Lian holds a Juris Doctor, a master's degree in Business Taxation, and a bachelor's degree in Accounting. He is also a licensed Certified Public Accountant (CPA).