Constantine has wide-ranging litigation experience, with expertise in securities, crypto asset, international, and class action litigation. Over the past fourteen years, he has represented litigants in some of the most notable fraud-based disputes in United States history. As a former judicial clerk to Judge William P. Dimitrouleas of the United States District Court for the Southern District of Florida, Constantine assisted the Judge in adjudicating over 100 civil cases. Before founding Dynamis, Constantine was a partner in an elite litigation boutique and also worked with large national firms in New York and Florida on numerous matters involving securities, international, and class action litigation. He represented the Securities Investor Protection Corporation as part of the team that recovered over $11 billion on behalf of the victims of Bernard Madoff’s Ponzi scheme. He also recovered funds on behalf of investors defrauded by failed blood-testing company Theranos, Inc. and its infamous founder, Elizabeth Holmes. Constantine currently represents an array of clients in complex domestic and international disputes involving crypto assets, securities, and commercial contracts. Additionally, Constantine recently became an arbitrator for Financial Industry Regulatory Authority, Inc. (“FINRA”), and in recognition of his work with securities litigation and class action litigation, he has been named a Rising Star by Super Lawyers Magazine for 2016 - 2022. Constantine is the co-founder and co-chair of the Federal Bar Association’s Federal Judicial Law Clerk Committee, which is designed to marshal and provide professional opportunities for the national network of current and former federal judicial clerks. Constantine frequently blogs about issues that he cares about. Read more about his analysis of the Electronic Funds Transfer Act and its application to crypto, or his discussion on the “Howey Test” and its application to crypto.

During his career, Mr. Sonn has litigated numerous cases to successful resolution, recovering many millions of dollars for defrauded investors. He recently won a $50 million final judgment in Katz v. MRT Holdings, one of the few cases in the Private Securities Litigation Reform Act passed in 1995 to yield a final judgment on the merits. Frequently, Mr. Sonn serves as a television commentator on securities fraud and ponzi scheme cases for CNBC, The CBS Sunday Morning Show, BBC Radio, ABC and MSNBC. Mr. Sonn was the CNBC contributing expert on the Bernard Madoff Ponzi Scheme for the CNBC shows “On the Money” and “Scam of the Century, Bernie Madoff and the $50 Billion Dollar Heist.” Mr. Sonn recently appeared in the CNBC show “American Greed.”