Jason Casey is a trial lawyer who represents individuals and corporations in high-stakes white collar criminal matters, complex civil litigation, and government enforcement actions. A former federal prosecutor with extensive experience trying and litigating some of the government’s most significant investigations and trials, Jason combines seasoned courtroom advocacy with strategic judgment to help clients navigate complex disputes from the earliest stages of an investigation through trial and appeal when necessary.
Jason defends clients facing federal criminal charges and civil enforcement actions involving fraud, export control and sanctions violations, trade secret theft, cybercrime, environmental crimes (e.g., Lacey Act), and other significant regulatory and enforcement matters. His extensive trial and appellate experience, together with his firsthand understanding of how prosecutors investigate, evaluate, and litigate complex cases, enables him to develop defense strategies that are both aggressive and informed by the realities of government enforcement. Whether negotiating a favorable resolution or preparing a case for trial, Jason approaches every engagement with the mindset of a courtroom advocate.
Clients also turn to Jason to handle sensitive government investigations and internal matters involving significant legal, financial, and reputational risk. He advises corporations, executives, and individuals through every stage of an investigation, developing strategies that protect clients’ interests while ensuring they are fully prepared should litigation become unavoidable.
Jason’s practice is shaped by his service 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, he led investigations and prosecutions involving fraud, terrorism, international money laundering, export control and sanctions violations, trade secret theft and other insider threats, cyberstalking, obstruction of justice, human trafficking, and other serious offenses. As the office’s National Security Cyber Specialist, he investigated and prosecuted sophisticated cyber-enabled threats, including complex network intrusions and nation-state cyber activity. His work frequently required close coordination with the Department of Justice’s National Security Division and the intelligence community and often received national and international media attention.
Earlier in his career, Jason served as an Assistant Attorney General in the Criminal Justice Bureau of the New Hampshire Attorney General’s Office, where he investigated and prosecuted homicide cases and argued appeals before the New Hampshire Supreme Court. He began his legal career at a Boston litigation boutique focusing on white collar defense.