Before joining Cahill, Sam served for eight years in the DOJ as an Assistant United States Attorney in the United States Attorney's Office for the Southern District of New York (SDNY), where he rose to become a senior member of the SDNY Securities and Commodities Fraud Task Force. As a federal prosecutor at SDNY, Sam conducted numerous jury trials in significant criminal cases, briefed and argued motions before federal district judges and appeals before the Second Circuit Court of Appeals, and led hundreds of grand jury investigations and prosecutions in a wide range of criminal cases, including several ground-breaking cryptocurrency-related prosecutions as well as matters involving corporate misconduct and whistle-blowers, securities fraud, commodities fraud, cybercrime, insider trading, obstruction of justice, false statements to regulators, accounting fraud, market manipulation, money laundering, tax crimes, wire fraud, violations of the Racketeer Influenced and Corrupt Organizations Act (RICO), and murder-for-hire. During his tenure at SDNY, Sam was nominated for the United States Attorney General's Distinguished Service Award in 2018 and received the Federal Law Enforcement Foundation's Prosecutor of the Year Award in 2014.