Jason Casey is a seasoned litigator who defends corporations and individuals in high-stakes white collar criminal matters, complex civil litigation, and government enforcement actions. A former federal prosecutor with substantial white collar and national security experience, Jason brings a rare combination of first-chair trial experience and strategic insight to every engagement, making him a trusted advisor when the stakes are at their highest.
Jason defends clients facing federal criminal charges and civil enforcement actions involving complex fraud schemes, malicious cyber activity, trade secret misappropriation and other insider threats, export control violations, and other high stakes matters. His extensive trial and appellate experience, combined with a prosecutor’s instinct for how the government builds, evaluates, and pursues cases, allows him to develop defense strategies that are both aggressive and calibrated to the realities of federal enforcement.
Beyond the courtroom, Jason advises corporations and executives navigating government investigations and other sensitive matters involving significant legal, financial, and reputational risks. He guides clients through every phase of a government inquiry — from its earliest stages through any resulting litigation — positioning clients to achieve the best possible outcomes in situations where the consequences can be significant.
Jason’s approach is shaped by his experience as an Assistant United States Attorney in the U.S. Attorney’s Office for the District of Massachusetts, including as Deputy Chief of the office’s National Security Unit. As a federal prosecutor, Jason led investigations and prosecutions involving fraud, economic espionage, terrorism, international money laundering, export control violations, cyberstalking, obstruction of justice, human trafficking, and other offenses. As the office’s National Security Cyber Specialist, Jason was also responsible for investigating, disrupting, and prosecuting complex cyber-enabled threats, including sophisticated network and computer intrusions. Jason’s work frequently required close coordination with the Department of Justice’s National Security Division and the intelligence community, and often garnered significant national and even international media attention.
Earlier in his career, Jason served as an Assistant Attorney General in the Homicide Prosecution Unit of the New Hampshire Attorney General’s Office, where he prosecuted more than a dozen homicide cases and argued appeals before the New Hampshire Supreme Court. Jason began his career at a litigation boutique in Boston focusing on white collar defense.