Zach Warren is a trial lawyer who represents corporate clients, professional firms, and individuals in complex civil and criminal matters.  He handles cases in courthouses around the country and has prevailed as first-chair trial counsel in federal and state courts and before arbitration panels.  He also regularly represents clients in investigations by grand juries, federal and state agencies, disciplinary bodies, and the United States Congress.  Zach’s practice has been recognized by publications such as Chambers and Lawdragon, which named him one of the 500 Global Leaders in Crisis Management.

In civil matters, Zach represents both plaintiffs and defendants in high-stakes litigation across the United States.  He has represented Fortune 500 companies, leading professional firms, and high-profile individuals in their most important cases and acts as lead counsel in jury trials, arbitrations, class actions, and multidistrict litigation.  His representations have spanned many substantive areas of law including antitrust, complex torts, commercial contract disputes, products liability, civil RICO, legal malpractice, securities, administrative law, constitutional law, unfair trade practice statutes, and employment law.

In white-collar matters, Zach has represented multinational corporations, C-suite executives, federal and state politicians, founders, labor unions, senior government officials, traders, bankers, lawyers, activists, and many others in indicted criminal cases, government investigations, and regulatory enforcement actions.  These matters have involved allegations such as wire/mail/bank/securities fraud, public corruption, foreign bribery (FCPA), tax crimes, antitrust offenses, insider trading, market manipulation, harboring of aliens, money laundering, obstruction of justice, false statements, mishandling of classified information, and violations of the Foreign Agents Registration Act (FARA).  Zach’s practice encompasses actions and investigations by a wide array of law enforcement and regulatory agencies including, among others, the Department of Justice, Securities and Exchange Commission, Commodity Futures Trading Commission, and state attorneys general.  Many matters involve parallel investigations by authorities in other countries.

Zach teaches Federal White-Collar Crime at Georgetown Law.  He also oversees Williams & Connolly’s pro bono criminal defense program in Montgomery County, Maryland.  Through that program, more than 150 of the firm’s lawyers have represented indigent criminal defendants in felony jury trials in Montgomery County.  Zach is a member of the Board of Directors of the Association for the Public Defender of Maryland.

Zach grew up in California, Cambodia, and Virginia.  He received his B.A. from Stanford University and graduated magna cum laude from Georgetown University Law Center, where he was Executive Articles Editor of the Georgetown Law Journal.  He clerked for Judge J. Frederick Motz on the United States District Court for the District of Maryland, and for Judge Julia Smith Gibbons on the United States Court of Appeals for the Sixth Circuit.