Mark tries cases and specializes in matters that are preparing for trial. He handles bet-the-company investigations and litigation, but some of his most significant successes have come in cases where he has been able to shut down a prosecution before it becomes public. In over 20 years as a criminal defense attorney, Mark has handled a wide array of matters across the United States and around the world, including representation of individuals in some of the largest fraud cases in history, as well as a range of traditional criminal cases.

Mark’s practice encompasses all manner of enforcement matters, and he has significant experience before a myriad of federal regulatory agencies including the SEC, CFTC, and CFPB. He also regularly deals with formal actions and investigations by the inspectors general from the DOJ, FBI, HHS, IRS, and USDA, to name a few.

In addition to advising companies and boards of directors, Mark maintains a significant number of individual representations, ranging from C-Suite to senior management, in a variety of criminal, civil, and administrative matters. He has extensive experience in Foreign Corrupt Practice Act matters, having represented individuals in some of the largest FCPA investigations in DOJ history.

Mark’s representative experience list is familiar to many, as his clients often attract significant media attention due to the nature of the matter and/or the client itself. His ability to manage public relations comes from years of high-profile representations taken from the headlines. A regular print and broadcast commentator, Mark has been interviewed by numerous media outlets including The Washington Post, The New York Times, Associated Press, CNN, Fox News, NBC, and other local affiliates. 

In one of the most competitive legal markets in the country, Mark has been recognized as one of the Washington Magazine’s Top 100 Lawyers, and consistently ranks as a Super Lawyers Honoree in the area of White Collar Criminal Defense. 
In addition to his proven track record as a trial lawyer, Mark is in his twelfth year as an adjunct professor at The George Washington University School of Law. He previously served as an elected member of the Board of Directors for the National Association of Criminal Defense Lawyers, where he is a member of the White Collar Crime Committee, the Sentencing Committee, and has been appointed as the NACDL representative to the American Bar Association 12-member Committee on Standards and Policy. Mark previously served on the Board of Directors of the Brockport Foundation and The Sparkle Effect.

Professional Activities

  • The George Washington University School of Law, Adjunct Professor, 2008-Present
  • National Association of Criminal Defense Lawyers, White Collar Crime and Sentencing Committees, 2012-Present (Board of Directors, 2014-2018)
  • Criminal Rule 16 Mini-Conference, Defense Expert, 2019
  • American Bar Association, NACDL Representative to the Criminal Justice Standards for the Prosecution and Defense Functions, 2016-2019
  • New York State Bar Association Committee on Professional Discipline, Member, 2010-2015
  • Regional Dialogue – Tashkent Uzbekistan, Advisory Counsel, 2013-Present
  • Boston University School of Law Young Alumni Association, Washington, D.C. Chapter, (Past President)
  • The Sparkle Effect, Board Member, 2012-2015

Honors and Awards

  • Chambers USA Ranked Lawyer, Litigation: White-Collar Crime & Government Investigations, Washington, D.C., 2018 – 2020
  • Recognized in The Best Lawyers in America (BL Rankings), Criminal Defense: White Collar, 2020 – 2021
  • Super Lawyers Honoree in the fields of Criminal Defense: White Collar, Criminal Defense, Civil Litigation, Washington, D.C. Super Lawyers magazine (Thomson Reuters), 2011 – 2020
  • Super Lawyers: Top 100 Lawyers in Washington, D.C., 2016
  • Washington Magazine’s Top 100 Lawyers, 2016

Media Contributions and Interviews

Selected Presentations

  • “Legends of the Boardroom 2019,” Panelist, Maryland State Bar Association (September 2019)
  • “The New Fourth Amendment: Carpenter Changes the Rules,” Moderator, Association of Corporate Counsel (ACC) Compliance and Ethics Network Webinar (August 7, 2018)
  • “Data Security, Law Enforcement and Device Encryption Issues,” Panelist, American Bar Association Business Law Section, Spring Meeting (April 2016)
  • “Game Plan: Hypothetical Exercises to Build Collaborative Skills,” Moderator, ACC Advanced Compliance Education Summit (April 28, 2015)

Any result the lawyer or law firm may have achieved on behalf of clients in other matters does not necessarily indicate similar results can be obtained for other clients.

  • Represented multiple professional athletes in a number of criminal, civil and administrative matters in a wide-ranging number of investigations by the professional league, as well as local and federal authorities. (Current)
  • Represented multiple federal and state and local law enforcement officers relating to alleged improprieties ranging from use of force in police involved shootings, time and attendance fraud allegations and various other alleged malfeasance. (Current)
  • Lead counsel in federal criminal matter in the Western District of New York.  Took over representation of well-known Doctor with an addiction practice in Western New York.  Following the start of trial and the cross examination of the government’s lead investigator, case was ultimately resolved with a dismissal of all criminal charges, dismissal of civil forfeiture and resolution with a corporate non-prosecution agreement. (2019)
  • Obtained complete dismissal of all charges relating to a vehicular homicide charge in Maryland. (2019)
  • Lead counsel in a federal criminal matter in the District of Maryland. Took over representation after client was convicted of multiple fraud counts following a four-week trial. Successfully set aside the verdict and obtained a new trial, which was ultimately dismissed by the Court on the eve of retrial, after exposing government misconduct that “shocked the conscience” of the Court. (2017)
  • Led team in multi-jurisdictional representation for a software company targeted in six different states for violating state gambling and money laundering statutes. Successfully prevented an indictment in Massachusetts and obtained the return of hundreds of thousands in seized funds and millions more sought civilly. Successfully defeated multiple superseding indictments in Ohio seeking over $100 million in forfeiture and 75 years in prison. (2013)
  • Lead counsel in a month-long murder trial of a federal agent in the United States Virgin Islands resulting in an acquittal on motion at the conclusion of the prosecution case. (2012)
  • Lead trial counsel in the first criminal charges against individuals in a nationwide sales seminar company. Full acquittal on all charges following a month-long trial in federal court in the Eastern District of Virginia. (2009)
  • Lead trial counsel, having taken over just weeks before a month-long trial in federal court in the Northern District of Ohio for a business owner under indictment for campaign finance violations, obtaining “not guilty” in nineteen of twenty charges. 

Bar admissions

1999, District of Columbia

2005, Maryland

2006, New York

Admitted to practice before:

  • U.S. District Court for the District of Maryland
  • U.S. District Court for the Southern District of New York
  • U.S. District Court for the District of Columbia
  • United States Court of Appeals for the Fourth Circuit
  • United States Supreme Court


  • J.D., 1998, Boston University School of Law
  • B.S., 1995, State University of New York at Brockport
    • with honors
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