Mark M. Lee


Mark M. Lee, a trial lawyer and former federal prosecutor, is a partner in the Firm’s white collar defense & investigations practice group. Mark concentrates his practice on defending corporations and executives against investigations and prosecutions conducted by the federal government. Mark also helps his clients manage and avoid risk by conducting internal investigations and corporate compliance assessments on their behalf. Clients turn to Mark to provide solutions that advance their business objectives and to navigate crises that present substantial reputational risks.


Mark routinely acts as an interface with government prosecutorial and regulatory agencies on behalf of both business and individuals, and has successfully negotiated favorable outcomes for clients facing the threat of prosecution. Mark has defended clients pre-indictment in connection with criminal prosecutions and grand jury investigations involving antitrust, securities, public corruption, FCPA, RICO, and money laundering. However, as not all matters result in prosecution declinations, he is prepared to aggressively represent his clients inside the courtroom should the need arise. He is a skilled trial lawyer, having tried cases to verdict before juries in both the United States District Court for the District of Delaware and the United States District Court for the Eastern District of Pennsylvania.


Mark has extensive experience organizing and directing complex investigations for both private and public sector entities. While serving as an Assistant United States Attorney for the District of Delaware, he led numerous federal grand jury investigations and subsequent prosecutions into a wide variety of white collar criminal activity, including into matters such as financial institution fraud, theft of government funds, aggravated identity theft, ERISA theft, corporate tax evasion, public corruption, money laundering, and mortgage fraud. In addition, he has directed several federal investigations involving various technologies, including peer-to-peer software applications, social networking websites, and wireless and mobile networks and devices. While in private practice, he has performed internal investigations and compliance assessments covering a wide variety of subject matters such as the Foreign Corrupt Practices Act (“FCPA”), money laundering, and data privacy.


Mark partners with businesses to uncover regulatory issues by developing and strengthening ethics, compliance, and training programs. He has counseled clients in relation to corporate compliance assessments for companies in numerous industries, including financial services, pharmaceutical, healthcare, and software. He also advises clients concerning cyber security and data privacy issues, such as assessments of policies and procedures, data breach preparation, and breach response and remediation. Mark also lends his in-depth knowledge to M&A and joint-venture transactions and has worked with deal teams to conduct FCPA and AML due diligence.

Outside the Firm

Mark is a proud father of two. He enjoys spending time mentoring youth, and volunteers as a youth club soccer coach during his spare time.


  • Trial counsel in the defense of a sitting U.S. congressman facing multiple federal criminal charges, including RICO, bank fraud, wire fraud, bribery, obstruction of justice, and money laundering.
  • Represented pharmaceutical companies and employees in defense of DOJ and State Attorneys General antitrust investigations into alleged price-fixing and market-allocation related to the sale of generic drugs.
  • Conducted internal investigation on behalf of a hospital into allegations of physician, workplace misconduct. Investigation included potential HIPPA and False Claims Act violations.
  • Lead counsel in the representation of a political action committee during an audit conducted by the Federal Elections Commission.
  • Multiple representations of nonprofit entities involving employee misconduct and misappropriation of funds. Engagements include conducting internal compliance audits and grand jury investigation defense.
  • Conducted a FCPA due diligence review of a multimillion dollar equity investment involving a U.S.-based offshore equipment provider and a multinational investment group.
  • Retained by a county solicitor’s office to conduct an internal investigation into allegations of ethics violations by local elected officials.
  • Represented a former employee witness in a SEC and DOJ investigation involving a United Kingdom company acquired by a leading Silicon Valley technology company.
  • Public corruption defense work includes defense of targets and subjects during federal and state grand jury investigations into theft of government funds, bribery and campaign finance fraud.
  • Represented a global waste-management corporation during a Pennsylvania state grand jury investigation.
  • Represented a federally-funded government agency during an Office Inspector General audit and regulatory investigation.
  • Successfully represented a Pittsburgh-based slot machine license applicant before the Pennsylvania Gaming Control Board.

News & Views

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  • 2018–2022, Criminal Defense: White Collar, Philadelphia, listed in Best Lawyers in America©
  • 2019, Minority Business Leader Award, by Philadelphia Business Journal



  • American Bar Association
  • Philadelphia Bar Association
  • Federal Bar Association
  • Pennsylvania Association of Criminal Defense Lawyers
  • Pennsylvania Bar Association
Professional Activities

Mark is actively committed to pro bono and community service. He is on the Board of Directors of the National Black Child Development Institute, a national education nonprofit organization, and was recently appointed by Governor Tom Wolf to serve as a Commissioner on the Pennsylvania Early Learning Investment Commission. In addition, Mark serves on the executive committee of the Federal Criminal Law Committee for the Eastern District of Pennsylvania.



  • Pennsylvania
  • New Jersey
  • United States Court of Appeals for the Third Circuit
  • U.S. District Court - Eastern District of Pennsylvania
  • U.S. District Court - New Jersey
  • Supreme Court of New Jersey
  • Supreme Court of Pennsylvania


  • University of North Carolina at Chapel Hill, BA
  • Temple University Beasley School of Law, JD