Anthony Lewis

Partner, Sullivan & Cromwell

Anthony Lewis is a partner in the Firm’s Litigation Group, a member of the Firm's Criminal Defense and Investigations Group, and co-head of the Firm’s Cybersecurity Practice. His practice focuses on international and government investigations and on cybersecurity incident response and advice. Mr. Lewis has represented clients in internal investigations and in regulatory enforcement proceedings, including with the Department of Justice, the Securities and Exchange Commission, the Commodity Futures Trading Commission, and with financial regulators, and in matters related to economic and financial crime, sanctions, and cryptocurrencies. He has advised clients in a wide variety of sectors, including technology, industrials, financial services and consumer goods.

Since 2021, he has been a member of the Criminal Justice Act Panel for the Central District of California.

Mr. Lewis joined the Firm in 2019 from the United States Attorney’s Office for the Central District of California, where he was Deputy Chief of the Terrorism and Export Crimes Section. During more than 10 years of service, he prosecuted violations of U.S. sanctions and export controls, sophisticated cybercrimes, financial frauds and criminal tax cases, as well as various domestic and international counterintelligence and counterterrorism matters. Mr. Lewis’ experience includes charging the largest-ever cyber heist at Bangladesh’s central bank that was part of a North Korean conspiracy, which also included computer network intrusions at other banks and at Sony Pictures Entertainment, and used the WannaCry ransomware. Additionally, Mr. Lewis was part of the litigating team seeking to compel Apple to decrypt an iPhone used by a terrorist in the San Bernardino attack. His work has involved in-depth digital forensic review, malware comparison, and internet-based investigation. He has conducted and supervised investigations and prosecutions involving OFAC-administered sanctions, the Export Administration Regulations, and the International Traffic in Arms Regulations. Mr. Lewis has tried a variety of cases and briefed and argued appeals before the Ninth Circuit.

Mr. Lewis began his career as an associate at S&C, where he worked on complex government investigations.