Sumon Dantiki Bio

Sumon Dantiki is a partner in the Special Matters & Government Investigations practice who focuses on sensitive, multi-dimensional investigations, disputes, and counseling often with cyber or national security implications. A former federal prosecutor and senior cyber / national security counselor, Sumon helps clients prevent and address critical risks to their business interests, including internal investigations, data breaches, insider threats, acquisition and cross-border investment due diligence and compliance, ransomware attacks, whistleblower complaints, and fraud. Prior to joining King & Spalding, Sumon served in several senior roles at the U.S. Department of Justice (DOJ), most recently as Senior Counselor to the Director of the Federal Bureau of Investigation (FBI). In this role, Sumon regularly counseled FBI leadership on the most sophisticated nation-state, cyber, insider, and espionage threats facing the country. This included assisting the Director of the FBI in his oversight of intelligence and criminal investigations and responses as well as working with the National Security Council, and other intelligence, law enforcement, and security agencies in responding to data breaches, insider threats, economic espionage, foreign investment risks, ransomware attacks, and other major security threats. Sumon routinely helped oversee responses to congressional committees, the Inspector-General's office, and other oversight bodies. He also served as Special Counsel to the Assistant Attorney General for National Security at DOJ and as a federal prosecutor within the DOJ Criminal Division’s Computer Crime and Intellectual Property Section. Sumon has been named a "leading partner" for National Security by Legal 500 (2025) and one of the 500 Leading Global Cyber Lawyers (multiple years) by Lawdragon. Earlier in his career, Sumon served as Adjunct Professor at Georgetown University Law Center (Cyber and National Security Threats) and as a judicial clerk to the Honorable Kenneth M. Karas in the Southern District of New York and the Honorable José A. Cabranes on the Second Circuit Court of Appeals. He graduated Phi Beta Kappa from the University of Michigan and holds a J.D. from Yale Law School where he won the Potter Stewart Prize.