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  1. Professionals

Guy Singer

Partner

New York

+1 212-294-1729

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  • Overview
  • Experience
  • Credentials
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A former federal prosecutor and distinguished trial lawyer, Guy centers his practice on complex white collar criminal defense, regulatory enforcement and compliance matters, and internal investigations. He advises clients across a broad range of industries, including healthcare, life sciences, energy, technology, and maritime. 

As a trial lawyer in the fraud section of the U.S. Department of Justice (DOJ) Criminal Division, Guy investigated and prosecuted all forms of white collar crime and public corruption throughout the United States. Drawing on his extensive experience, he advises clients on their most high-stakes white collar fraud matters and routinely represents companies and individuals in both internal and government-led investigations, including matters involving the Foreign Corrupt Practices Act (FCPA), earnings management investigations, scientific fraud allegations, and other types of alleged corporate misconduct. Guy has appeared before numerous federal agencies, among them the DOJ, the U.S. Securities and Exchange Commission (SEC), and other state agencies and attorneys general. 

Guy regularly partners with clients to evaluate and develop corporate compliance programs and advises boards of directors on various matters related to corporate compliance. Guy also has vast experience with corporate crisis management and corporate monitorships and has served as both a government-appointed monitor and as corporate counsel to companies placed under monitorship. Most notably, the DOJ, SEC, and Brazil’s Federal Prosecution Service (MPF) selected him to serve as the corporate monitor in connection with Operation Car Wash, widely regarded as the largest corruption investigation in history. Guy received numerous other commendations from federal and state law enforcement agencies during his tenure at the DOJ.

Prior to the DOJ, Guy handled public corruption, organized crime, sex crimes and other matters as a federal and state prosecutor in South Florida. His breadth of experience makes him a trusted advisor on matters that extend beyond traditional corporate white collar defense. He has, for instance, led investigations involving allegations of sexual misconduct, national security concerns, and art fraud.

Known for his extensive experience in public corruption and white collar crime, Guy is often sought out by the national media for his insights on high-profile cases. Outside of his legal practice, he serves as an adjunct law professor at the University of Pennsylvania Carey Law School, where he teaches a course on corporate governance, ethics, and compliance.

Key Matters

Some of the experience represented below may have been handled at a previous firm.

  • Represented a large multinational company in the healthcare industry before the DOJ and SEC in a multi-year FCPA investigation that spanned five continents
  • Represented an oil and gas company in connection with internal and DOJ anti-corruption investigations, third-party due diligence, and a variety of compliance matters, including drafting anti-corruption policies and procedures
  • Conducted large internal investigations into allegations of FCPA and other criminal violations in multiple countries for several large multinational companies in the shipping, oil and gas, engineering, and commodities industries
  • Conducted a forensic review of third-party interactions and a comprehensive risk assessment for a large multinational company in the shipping industry
  • Provided anti-corruption compliance counseling, including drafting anti-corruption compliance policies and procedures, to multinational companies in several industries, including mining and defense
  • Conducted an internal investigation and provided anti-corruption compliance advice to a multinational company in the logistics industry
  • Co-led the investigation and prosecution of Washington, D.C.-based lobbyist Jack Abramoff and all related parties, leading to conviction of many individuals, including a U.S. Congress member
  • Led prosecution in a large-scale healthcare fraud investigation that resulted in more than 50 convictions and was featured on NBC’s “Dateline” program
  • Tried State v. Kirk Billie, a high-profile double homicide case that was aired on Court TV and featured on ABC’s “20/20” program
  • Tried and obtained convictions in United States v. Kirkland et al., the only trial stemming from one of the largest pension-fraud cases in U.S. history

  • Global Investigations Review’s GIR 100, Recommended, 2024
  • Chambers USA, FCPA: Nationwide, 2017-2022 and 2025; Litigation: White-Collar Crime & Government Investigations: District of Columbia, 2018-2019 and 2025
  • Chambers USA, FCPA: Global, 2019-2020
  • GIR Just Anti-Corruption, Washington DC’s FCPA Bar, highly recommended
  • Legal 500, Recommended for White-Collar Criminal Defense, 2015-2016
  • Assistant Attorney General’s Award for Ensuring Integrity of Government
  • DOJ, Meritorious Award for Superior Performance of Duties

Capabilities

Compliance Programs
Corporate Governance
Crisis Management
Government Program Fraud, False Claims Act & Qui Tam Litigation
Litigation/Trials
White Collar & Government Investigations
Healthcare
Life Sciences
Maritime & Admiralty
Oil & Gas
Technology, Media & Telecommunications

Key Matters

Some of the experience represented below may have been handled at a previous firm.

  • Represented a large multinational company in the healthcare industry before the DOJ and SEC in a multi-year FCPA investigation that spanned five continents
  • Represented an oil and gas company in connection with internal and DOJ anti-corruption investigations, third-party due diligence, and a variety of compliance matters, including drafting anti-corruption policies and procedures
  • Conducted large internal investigations into allegations of FCPA and other criminal violations in multiple countries for several large multinational companies in the shipping, oil and gas, engineering, and commodities industries
  • Conducted a forensic review of third-party interactions and a comprehensive risk assessment for a large multinational company in the shipping industry
  • Provided anti-corruption compliance counseling, including drafting anti-corruption compliance policies and procedures, to multinational companies in several industries, including mining and defense
  • Conducted an internal investigation and provided anti-corruption compliance advice to a multinational company in the logistics industry
  • Co-led the investigation and prosecution of Washington, D.C.-based lobbyist Jack Abramoff and all related parties, leading to conviction of many individuals, including a U.S. Congress member
  • Led prosecution in a large-scale healthcare fraud investigation that resulted in more than 50 convictions and was featured on NBC’s “Dateline” program
  • Tried State v. Kirk Billie, a high-profile double homicide case that was aired on Court TV and featured on ABC’s “20/20” program
  • Tried and obtained convictions in United States v. Kirkland et al., the only trial stemming from one of the largest pension-fraud cases in U.S. history

Credentials

Education

Guy earned his J.D. from New England Law Boston. He received his B.A. from the University of Hartford. 

    Admissions
    • District of Columbia
    • New York

    Related Insights & News

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    Winston Expands White Collar & Government Investigations Practice with Partners Anne Murray and Guy Singer

    April 7, 2026

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    Capabilities

    Compliance Programs
    Corporate Governance
    Crisis Management
    Government Program Fraud, False Claims Act & Qui Tam Litigation
    Litigation/Trials
    White Collar & Government Investigations
    Healthcare
    Life Sciences
    Maritime & Admiralty
    Oil & Gas
    Technology, Media & Telecommunications
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