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Gregory G. "Greg" Marshall

Washington, DC

Trusted criminal defense attorney serving Washington.

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Gregory G. "Greg" Marshall is an attorney based in Washington, DISTRICT OF COLUMBIA. The practice focuses on Criminal Defense and White Collar.

Based in
Washington, DISTRICT OF COLUMBIA
Experience
attorney
Known for
Criminal Defense · White Collar
  • Handles Criminal Defense and White Collar matters from Washington, DISTRICT OF COLUMBIA.
  • Recognized with Best Lawyers in America — Criminal Defense: White-Collar (2026).

About Gregory G. "Greg" Marshall: Gregory G. "Greg" Marshall is an attorney based in Washington, DISTRICT OF COLUMBIA. The practice focuses on Criminal Defense and White Collar.

Areas of practice

Practice focus

Gregory G. "Greg" Marshall represents clients in Washington, District of Columbia across the following areas of law. Each area links to other verified attorneys with the same focus.

Biography

About Gregory G. "Greg" Marshall

A former federal prosecutor with extensive trial and appellate experience, Greg Marshall represents companies and individuals defending government enforcement, white-collar criminal, and civil litigation matters. Greg also conducts internal investigations and advises clients on compliance issues. He has assisted clients in the financial services, healthcare, government contracting, technology, export, and education sectors.

Greg has defended investigations and cases involving the False Claims Act, the Sherman Act, the Foreign Corrupt Practices Act, the export control laws, and allegations of healthcare, corporate, securities, and tax fraud. He regularly handles matters involving the U.S. Department of Justice, federal agency Inspectors General, the U.S. Securities and Exchange Commission, state Attorneys General, and other federal and state enforcement agencies.

Greg joined the firm after spending more than 12 years as an Assistant U.S. Attorney (AUSA) in the U.S. Attorney’s Office for the District of Columbia, where he served as Deputy Chief of the Criminal Division from 2009 to 2010. In that position, Greg supervised approximately 75 senior prosecutors handling all types of federal investigations and cases, including healthcare fraud, corporate and securities fraud, export enforcement, tax fraud, money laundering, public corruption, espionage, and international and domestic terrorism. He also served in the D.C. U.S. Attorney’s Office as Acting Chief of the Asset Forfeiture Unit, as Senior Litigation Counsel, and as a line AUSA in the Fraud and Public Corruption Section, the Organized Crime and Narcotics Trafficking Section, and the Sex Offense and Domestic Violence Section. During his tenure as a prosecutor, Greg directed scores of grand jury investigations, tried approximately 45 trials, and argued eight direct appeals. He earned nine U.S. Department of Justice special achievement awards for superior performance.

Greg has served on the adjunct faculty at the University of Virginia School of Law, where he taught Trial Advocacy. Prior to becoming a federal prosecutor, he clerked for Chief Judge Joseph W. Hatchett of the U.S. Court of Appeals for the Eleventh Circuit, and worked at an international law firm in New York. Before attending law school, Greg taught for two years at a public junior high school in Manhattan.

Credentials

Education

  • Columbia University

    — · 1994

  • Cornell University

    J.D. · 1993

  • Bucknell University

    B.A. · 1988

Recognition

Awards & honors

  • Best Lawyers in America — Criminal Defense: White-Collar

    2026

  • Best Lawyers in America — Additional Areas of Practice:

    2026

  • Best Lawyers in America — Government Contracts

    2026

  • Best Lawyers in America — Qui Tam Law

    2026

Locations

Office locations

Main office

1900 K Street, NW

Washington, District of Columbia 20006

Open in Google Maps

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Frequently asked

Common questions

  • What areas of law does Gregory G. "Greg" Marshall practice?

    Gregory G. "Greg" Marshall focuses on Criminal Defense and White Collar.

  • Where is Gregory G. "Greg" Marshall located?

    Gregory G. "Greg" Marshall primarily serves clients in Washington, District of Columbia, with an office at 1900 K Street, NW.

  • Is Gregory G. "Greg" Marshall a verified attorney?

    Gregory G. "Greg" Marshall's profile is listed but has not yet been claimed by the attorney. Verification status is pending.

  • How can I schedule a consultation with Gregory G. "Greg" Marshall?

    You can book a consultation through LawyersListed directly from this page. Initial outreach can also be made by phone at 202-393-7150.