Overview

Mark is a partner in the firm’s Investigations & White Collar Defense Practice Group. His practice involves complex financial crimes, including securities law violations, market manipulation, investment fraud, False Claims Act matters, public corruption, cross-border crimes, and all types of government enforcement investigations.

With experience trying more than 65 jury trials to verdict, he has managed a range of matters involving financial fraud, regulatory violations, criminal procurement fraud, health care fraud, domestic bribery, money laundering, FCPA (Foreign Corrupt Practices Act) violations, and ABAC (Anti-Bribery and Anti-Corruption) matters. Earlier in his career, he served as an assistant district attorney in Philadelphia, where he handled hundreds of criminal trials involving homicide, sexual assault, and other felony offenses.

Before joining Honigman, Mark served in the U.S. Department of Justice as principal assistant chief of litigation in the Criminal Division’s Fraud Section. In that role, he supervised litigation, worked on high-profile cases, contributed to the development of the Fraud Section’s cryptocurrency and digital asset practice, and participated in the department’s commodities enforcement initiative.

His government experience also included efforts to combat fraud against the government through the use of data analytics and collaboration with agencies including the Securities and Exchange Commission (SEC), Commodity Futures Trading Commission (CFTC), Federal Bureau of Investigation (FBI), and Financial Crimes Enforcement Network (FinCEN). He has worked on matters that brought criminal prosecution to cases previously handled by civil regulators and participated in a landmark investigation into clergy abuse in the Archdiocese of Philadelphia.

Services

Experience

Representative Matters

  • A significant corporate case involving a German engineering firm for their role in defrauding the Environmental Protection Agency and a large auto manufacturer’s U.S. customers. The guilty plea resulted in the appointment of an independent corporate compliance monitor.*
  • A significant prosecution of three traders for their participation in a $60 million commodities fraud and spoofing conspiracy.*
  • The prosecution of a former associate general counsel of a publicly traded company for insider trading.*
  • Investigation of the CEO of a cryptocurrency mining and investment platform, who was charged in alleged $62 million cryptocurrency fraud scheme.*
  • Case involving founder and promotor of a foreign cryptocurrency company charged in multimillion dollar securities fraud scheme.*
  • A $2 billion Ponzi scheme involving cryptocurrency; one of the largest cryptocurrency seizures to date.*
  • A case against the founder of a purported cryptocurrency and virtual payment services company, who was convicted of defrauding investors by marketing and selling fraudulent virtual currency.*
  • High-profile fraud and money laundering case where co-conspirators sought over $20 million in pandemic relief funds (over $18 million obtained). All eight defendants were convicted by trial or guilty plea.*
  • 28-defendant military fraud case in which all individuals were convicted either by guilty plea or trial for their roles in a wide-ranging bribery and fraud scheme.*
  • Prosecution of an elected county commissioner who was convicted of bribery for accepting things of value in exchange for political favors.*
  • Prosecution of a federal contracting officer and a government contractor convicted of steering contacts to deliver the U.S. Mail.*
  • Prosecution of an elected sheriff and others who were convicted of fraud, corruption, and obstruction charges.*
  • Case against three government officials, including a supervisor, who were convicted by a jury of bribery for their roles in a scheme to distribute illegal narcotics through the U.S. Mail in Washington, DC.*
  • High-profile investigation of the former commanding officer of Guantanamo Bay, Cuba for obstructing justice and making false statements in connection with the death of a civilian at the naval base.*
  • Landmark investigation and prosecution of clergy abuse in the Archdiocese of Philadelphia, including the first prosecution of church official in the U.S. for his role in handling allegations of abuse.*
  • Defense of multiple government contractors in grand jury investigations and inspector general investigations.*
  • Internal investigation into allegations of foreign bribery involving Mexican subsidiary of U.S. manufacturer.*
  • Defense of laboratory testing company in DOJ grand jury investigation.*
  • Represent government contractor in SBA investigation.*
  • Due diligence investigation into potential acquisition on behalf of foreign automotive parts manufacturer.*
  • Internal investigation into trade secret theft and economic espionage involving Chinese subsidiary of U.S. machine manufacturer.*
  • Defense of executives and others in DOJ, SEC, FRB, and state attorney general matters.*
  • Internal investigation of allegations of fraud involving fintech payment processing platform.*
  • Internal investigation into allegations of foreign bribery involving global food processing and aviation equipment manufacturer.*
  • Represented a clinical laboratory related to a federal healthcare fraud investigation.*
  • Represented a large healthcare insurance company in an investigation by state regulators of certain business practices. The matter was successfully resolved without prosecution or civil litigation and no penalties or fines were assessed.*
  • Represented a healthcare executive of a publicly-traded corporation related to the potential mandatory disclosure of an adverse event to the FDA which would have caused serious reputational harm to the company. After thorough investigation and analysis, the matter was resolved without disclosure or any adverse impact.*
  • Conducted numerous internal investigations for multi-national corporations related to bribery, extortion, theft, and other allegations of fraud.*
  • Counseled a variety of clients on issues related to compliance, including both foreign and domestic ABAC concerns, TINA, election interference and fraud, risk assessments, employee training, systems testing, and related matters.*
  • Successfully represented wholesaler of vape and cannabis products in federal district court.*
  • Represented numerous clients in SEC investigations related to allegations of insider-trading, market manipulation, misrepresentations, Reg A/A+ offerings, and related matters.*
  • Defense of hotel executive on DOJ investigation.*

*matter handled prior to joining Honigman LLP

Prior Experience

  • Thompson Hine, Partner
  • U.S. Department of Justice, Principal Assistant Deputy Chief, Assistant Chief, Trial Attorney, Fraud Section; Trial Attorney, Public Integrity Section
  • City of Philadelphia, Assistant District Attorney, Homicide Unit

Credentials

Education

Widener University School of Law, J.D.
Temple University, B.A.

Admissions

  • District of Columbia
  • Pennsylvania

Court Admissions

  • U.S. Supreme Court
  • U.S. Court of Appeals for the Sixth Circuit

Recognition

Awards

  • Lawdragon 500 Leading Global Investigations Lawyers, 2026
  • The Legal 500 City Elite - Washington, D.C. (Recommended Lawyer (Tier 1), White Collar Crime), 2026
  • Director's Certificate, Federal Bureau of Investigation, 2023
  • Council of the Inspectors General on Integrity and Efficiency Award for Excellence, 2022
  • Attorney General's Award for Exceptional Work in the Commodities Enforcement Initiative, 2022
  • John Arterberry Award for Professionalism, 2021
  • Assistant Attorney General's Award for Exceptional Services, 2020

News & Insights

Events

  • Under the Microscope: Government Scrutiny in Investment Management,” Thompson Hine Investment Management Coffee Chat Webinar Series, Session 7, October 2025
  • “Corporate Citizenship Isn’t a Shield,” Thompson Hine Transition: A Presidential Change Webinar Series, Session Twelve, April 2025
  • Instructor, National Advocacy Center, Columbia, South Carolina, Multiple Dates
    Served as an instructor at NAC’s trial advocacy courses, trained prosecutors on various subjects, including the development and delivery of effective closing arguments and rebuttals, evidentiary issues, and pretrial litigation.
  • ESG Enforcement: A Discussion with the DOJ on Its Revised Corporate Crime Enforcement Policy, June 2023
    Presented at the Society of Corporate Compliance and Ethics ESG and Compliance Conference; Helped attendees understand revisions to DOJ’s Corporate Crime Enforcement Policy and practices, the effects of corporate cooperation, and the importance of preventive compliance measures.
  • Using Data to Detect Market Manipulation and Other Fraud, Sofia, Bulgaria, and Bucharest, Romania, June 2022
    Presented at a training hosted by the Office of Overseas Prosecutorial Development Assistance and Training in Bulgaria and Romania on how to effectively use data in complex white-collar investigations.
  • Fraud and Anti-Corruption Workshop, Dhaka, Bangladesh, May 2022
    Lead presenter at training hosted by the Office of Overseas Prosecutorial Development Assistance and Training on topics including public corruption, financial fraud, asset forfeiture and money laundering, whistleblower laws, conflicts of interest, and proactive investigative techniques.
  • Pandemic Fraud Roundtable, Washington, D.C., January 2022
    Participated in a panel co-hosted by the American Bar Association and the American Bankers Association about various fraud schemes related to the COVID-19 pandemic and the enforcement actions that followed.
  • Virtual Assets: Emerging Trends and the Law, Washington, D.C., May 2021
    Discussed emerging trends and case law in financial crime involving cryptocurrency and virtual asset service providers. Focused on the use of cryptocurrency and other virtual assets for fraud and money laundering, as well as the applications of the Bank Secrecy Act and Securities and Exchange Act to virtual asset activities for the FDIC’s Financial Crimes Conference.
  • Grand Jury Practice, Washington, D.C., April 2021
    Conducted training involving grand jury practice, including the use of the grand jury’s subpoena power, the presentation of witnesses and evidence, privileges, and parallel proceedings.
  • Major Litigation Developments in Cryptocurrency, Washington, D.C., September 2019
    Moderated a panel hosted by the U.S. Commodity Futures Trading Commission on recent developments in the regulation of cryptocurrency, as well as the investigation and prosecution of criminal cases involving exchanges, fraudulent initial coin offerings, and other illegal schemes.
  • Prosecuting and Investigating Fraud and Corruption Cases, Dhaka, Bangladesh, September 2018
    Presented a three-day course to prosecutors, investigators, and public officials detailing common investigative techniques and statutes used in the U.S. to prosecute fraud and corruption offenses.
  • Investigative Techniques in Fraud and Public Corruption Cases, Kansas City, MO, October 2017
    Trained agents with the Federal Bureau of Investigation on how identify and develop evidence in federal, state, and local public corruption investigations, including the use of informants, cooperating witnesses, documentary evidence, pen registers and wire taps, and search warrants.
  • The Prosecution of Public Corruption, Multiple Locations, June 2017
    Presented a two-day course to federal agents and prosecutors detailing the development and management of complex cases and providing updates on changes in the relevant case law.
  • Public Corruption and Election Crimes Seminar, Houston, Texas, April 2017
    Co-led seminar on investigating and prosecuting corruption and election crimes in the United States, including trial strategy and proper jury instructions.
  • Use of Cooperators in Domestic and Foreign Corruption Cases, Bogota, Columbia, March 2017
    Guest lecturer for local law enforcement, prosecutors, and judges on various aspects of bribery laws in the United States. Discussed investigative techniques, case management, legal theories, and the development of new laws both in the U.S. and abroad.
  • Whistleblowers in Corruption Cases, Florianopolis, Brazil, September 2016
    Guest lecturer at international seminar regarding the use of whistleblowers and informants in public corruption cases, including violations of the FCPA.
  • Complex Fraud Investigations, Fort Belvoir, VA, May 2015
    Presented to federal agents from the U.S. Army’s Criminal Investigation Command involving issues arising in complex fraud investigations, charging theories, and investigative techniques.
  • Other Presentations - Conducted a variety of trainings and lectures on topics such as the use and presentation of DNA evidence, the investigation of drug-facilitated sexual assaults, character evidence, and case studies on complex white-collar crimes.

Publications

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