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Mark A. Rush

Mark Rush is a partner with the firm and concentrates his practice on domestic and international internal investigations, corporate criminal defense, False Claims Act defense, and complex commercial litigation. Mark has defended public and private corporations, energy companies, teaching universities, financial institutions, public officials, government contractors, and healthcare systems who are subjects of federal and state grand jury investigations and investigations by various federal and state agencies. His representations includes defending and counseling corporations and individuals charged with violations of various federal and state statutes such as: BSA, Foreign Corrupt Practices Act, False Claims Act, securities laws, tax statutes, mail and wire fraud, healthcare fraud, environmental violations, and money laundering. Mark has represented clients in matters investigated by the DOJ (including AFMLS/MLARS), FBI, IRS, FinCEN, FTC, DEA, FDA, DHS, USPIS, EPA, FRB, IG offices, and corresponding foreign and state agencies. Additionally, Mark has coordinated and conducted internal and special committee investigations and due diligence projects within the United States and in numerous foreign countries.

Mark represented a Presidential Advisor in the Independent Counsel Investigation of President Clinton. He served as special counsel to a bipartisan Pennsylvania Senate Committee on the removal of the Attorney General. He represented the Speaker of the House of Pennsylvania in the investigation by the “House Select Committee to Investigate the January 6th Attack on the Capitol.” He also represents the Pennsylvania House and Senate Republican Caucuses.

From 1991-1995, Mark served as an assistant United States attorney for the Western District of Pennsylvania, where he conducted numerous grand jury investigations across a broad spectrum of federal statutes, sought the return of indictments, and prosecuted the defendants, both individuals and corporations, by jury trial or plea.

Mark has previously served as a United States Army judge advocate.  He was appointed as a Japan trial court U.S. representative by the U.S. Ambassador to Japan.

Mark is listed in Chambers, USA, The Best Lawyers in America® (Woodward/White, Inc.), and Corporate Counsel Magazine Top Lawyers for criminal defense-white collar. He is also a Recommended Attorney by Legal 500. He has received an AV® rating from Martindale-Hubbell, its highest rating. He is also listed in PA Super Lawyers. He is also listed as an Acritas Star as selected by in-house counsel.

  • Recognized by The Legal 500 United States as a Recommended Lawyer for Corporate investigations and white-collar criminal defense: advice to individuals, 2024
  • Recognized by Chambers USA for Litigation: White-Collar Crime & Government Investigations in Pennsylvania, 2018-2024
  • Named in The Best Lawyers in America® for Criminal Defense: White Collar since 2010
  • Allegheny County Bar Association (Civil and Federal Criminal Practice Section)
  • American Bar Association (Civil and Criminal Litigation Sections)
  • Board Member, Western PA Chapter, National Pancreas Foundation
  • “Operation Brace Yourself: Lessons Learned from the Trenches and Best Practices to Avoid Investigations Predicated on Third-Party Malfeasance,” Medtrade Advisory Board, Atlanta, GA, October 22, 2018
  • “State and Federal Grand Jury Practice in the Era of Mueller and PA Grand Jury Reform Efforts,” 2018 White Collar Practice Seminar, November 15-16, 2018
  • “Privileged or Not Privileged: The Attorney-Client Doctrine Under Attack,” Washington & Jefferson College Homecoming and Reunion Weekend 2018, Washington, PA, October 13, 2018
  • “What You Don’t Know Can’t Hurt You, Right? Resolving the Inherent Tension between the Yates Memo and the Collective Knowledge Doctrine in Environmental Criminal Enforcement Actions,” EMLF Annual Institute, Nashville, TN, June 18, 2018
  • “View From a Federal Prosecutor,” 2018 Medtrade Spring Conference, Las Vegas, NV, March 27-29, 2018
  •  Moderator, “Mock Breach Exercise and Dealing with Law Enforcement,” Cracking the Code: Cybersecurity for Tomorrow, November 10, 2016
  • “Judicial Ethics: When Ego and Entitlement Transcend the Law," The W&J Annual Legal Lecture, October 10, 2015
  • “A Guide to the Development of a Cyber Data Breach Action Plan,” K&L Gates CLE Program: Cybersecurity: Minimizing Risk and Managing Consequences, Mark A. Rush and Thomas C. Ryan, Pittsburgh, PA, December 9, 2014.
  • “DOJ’s Enforcement Trends, Investigative Strategies and Corporate Internal Investigations,” The Audit Committee Forum, Philadelphia, Pennsylvania,
    November 29, 2012
  • Additional engagements available upon request
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