Experience

Deliverables

We deliver actionable intelligence and advisory support designed to identify, mitigate, and manage risk, including:

Identification, quantification, and isolation of internal and external risk factors
Incorporation of best practices into organizational policies and procedures
Mitigation of civil and criminal liability exposure
Development of practical litigation strategies informed by decades of federal investigative and prosecution experience
Intervention on behalf of clients in coordination with the U.S. Government when appropriate
Identification of vulnerabilities impacting brand, reputation, and corporate profitability

Past Performance

We have successfully supported major U.S. corporations, law firms, and high-value clients in matters involving:

Enhanced due diligence
Regulatory compliance
Government relations development
VISA, sanctions, and traveler redress
Internal fraud investigations
Anti-money laundering assessments
Asset tracing
Litigation support

These engagements have resulted in successful case outcomes, effective risk mitigation, and regulatory resolution.

Mack Strong | President & CEO

Mack Strong is the President and Chief Executive Officer of Stack & Associates LLC, a U.S. government–vetted investigative and anti–money laundering consulting firm. With more than 30 years of federal, military, and intelligence experience, Mack is a nationally recognized expert in complex international financial investigations, foreign public corruption, and global money laundering schemes. Throughout his career, Mack has served as a senior federal law enforcement executive and subject matter expert supporting the mission of protecting the financial infrastructure, commerce, and national security of the United States. He retired from federal service in 2025 after a distinguished career with U.S. Department of Homeland Security Investigations (HSI), where he held leadership roles directing high-impact, multinational investigations.

Federal & Investigative Leadership

For over 25 years, Mack served as a Supervisory Special Agent and senior manager within HSI, including as the designated management official in charge of the El Dorado Task Force South – Kleptocracy / Foreign Public Corruption Unit, a U.S. Treasury (FinCEN)–designated enforcement task force. In this role, he led investigations targeting global oligarchs, politically exposed persons (PEPs), narcotics trafficking organizations, and actors involved in human rights abuses and war crimes. Mack has directed and overseen hundreds of complex investigations involving international money laundering, financial fraud, asset identification and forfeiture, sanctions evasion, and foreign corrupt practices. His work has resulted in over $1.8 billion in illicit proceeds identified, seized, or forfeited, as well as hundreds of federal and state arrests and prosecutions.

National Security & Special Programs

Following the events of September 11, Mack served as a founding managing official of a DHS Domestic Security Task Force focused on counterterrorism and critical infrastructure protection. His oversight included sensitive national security assets such as ports of entry, international airports, nuclear power facilities, and other protected infrastructure across South Florida. He has also held assignments as a temporary duty (TDY) operations manager at DHS headquarters in Washington, D.C., overseeing significant money laundering and narcotics investigations across multiple major U.S. cities.

Current Practice

As CEO of Stack & Associates, Mack leads global investigative and advisory initiatives for government agencies, law firms, financial institutions, and multinational corporations. His work focuses on identifying financial crime risk, regulatory exposure, insider threats, and vulnerabilities related to:

Anti–Money Laundering (AML) and sanctions compliance
Foreign Corrupt Practices Act (FCPA) violations
OFAC and sanctions enforcement
Bank Secrecy Act and Patriot Act violations
Securities and investment fraud
Asset tracing, seizure, and forfeiture
Corporate compliance, reputational risk, and litigation support

Mack frequently serves as an expert witness and criminal investigator, maintaining close professional relationships with the U.S. Department of Justice and other regulatory authorities.

Military & Education

Mack is an honorably retired veteran of the U.S. Department of Defense, having served as a first-line leader in Military Intelligence and as an Infantry Soldier. He holds two Bachelor of Science degrees and is formally trained and certified by the U.S. government as a federal criminal investigator. He maintains an active Top Secret security clearance.

Recognition

Mack’s leadership and investigative excellence have been recognized with numerous national awards, including:

2023 – Special National Director’s Award, U.S. Department of Justice, Organized Crime Drug Enforcement Task Force
2020 – Director’s Award for Investigative Excellence, U.S. Department of Homeland Security Investigations

Global Network

Mack maintains an extensive global professional network across U.S. and international agencies, including DOJ, DHS, FBI, DEA, IRS, OFAC, SEC, DOD, DIA, CBP, and allied foreign law enforcement and intelligence partners.