As Chief and Deputy Chief of IRS Criminal Investigation from 2022 through April 2026, Guy directed one of America’s largest federal law enforcement organizations, overseeing operations with an annual budget exceeding $1 billion and leading a global workforce of approximately 3,500 personnel. This included managing over 2,300 special agents deployed across 20 domestic field offices and operations in 14 international locations.
Throughout his law enforcement career, Guy spearheaded investigations into major financial crimes spanning tax evasion, sanctions violations, money laundering, corruption, banking misconduct, cybercrime, cryptocurrency offenses, and terrorism financing. His leadership encompassed some of the most consequential cases in recent history.
In his roles as both Chief and Deputy Chief, Guy directed several landmark investigations, including Janet Mello’s $100 million grant fraud scheme, a $1 billion syndicated conservation easement tax fraud conspiracy, the comprehensive $1 billion BSA and IEEPA investigation of Binance, a major biofuel tax conspiracy, and multiple prominent darknet marketplace cases involving narcotics trafficking, cybercrime, identity theft, and child exploitation materials.
Guy also co-chaired the Treasury Department’s Fentanyl Strike Force and led IRS-CI’s participation in the United States’ “Task Force Kleptocapture” following Russia’s invasion of Ukraine. His international leadership roles included serving on the Executive Policy Board for the International Law Enforcement Academy (ILEA), active participation in the OECD Task Force on Tax Crimes and other Crimes (TFTC), and most recently chairing the OECD Tax Crimes Enforcement Network (TCEN). Guy also represented the United States as the Chief of IRS-CI as part of the Joint Chiefs of Global Tax Enforcement (J5), driving several international tax and white collar crime initiatives.
As an established expert in financial crime enforcement, Guy regularly addresses domestic and international audiences on complex white-collar fraud, cryptocurrency investigations, and anti-money laundering compliance. Under his leadership, IRS-CI launched an innovative Public Private Partnership initiative (CI FIRST) designed to foster comprehensive collaboration between law enforcement and Bank Secrecy Act filers, including financial institutions, casinos, and money service businesses.
Guy championed a data-driven transformation within IRS-CI, cultivating a new generation of analytically-minded leaders better equipped to make strategic decisions for the U.S. government. Notable innovations include an artificial intelligence tool that assesses prosecution likelihood during investigation initiation phases, utilizing machine learning to optimize resource allocation. Additional analytical tools have enhanced strategic hiring decisions and ongoing financial resource deployment.
His government service includes a congressional fellowship with the Permanent Subcommittee on Investigations for Homeland Security and Governmental Affairs, where he contributed to complex oversight investigations examining international tax shelters, corporate stock option abuses, and credit card fraud. Throughout his IRS-CI tenure, he has regularly briefed senior government officials and congressional staff on critical matters.
Guy began his IRS career in 1995 as a Special Agent in New York, progressively advancing through various supervisory positions before joining the Senior Executive Service in May 2020 as Executive Director of Global Operations, a role he held until his appointment as Deputy Chief in July of 2022.
Guy earned his bachelor’s degree in accounting from Dominican University (NY) and maintains professional memberships in both the Association of Certified Fraud Examiners (CFE) and the Association of Certified Sanctions Specialists.
