Alphabetical by Last Name

View by Practice Area

View by Admissions

View by Law School

Search by Name

Practice Areas


  • M.P.A., Princeton University, 1985
  • J.D., New York University School of Law, 1985
  • A.B., Harvard College, 1981, magna cum laude

Bar and Court Admissions

  • District of Columbia
  • District of Columbia Court of Appeals
  • U.S. Court of Appeals for the District of Columbia Circuit
  • U.S. District Court for the District of Maryland

Other Professional Affiliations

Fellow, American College of Tax Counsel

Member, American Bar Association, Criminal Justice and Tax Sections

Member, American Citizens Abroad, Professional Tax Advisory Council

Mark E. Matthews

Member, Washington, D.C.
(202) 862-5082 | v-card | PDF
Mark E. Matthews is a Member in Caplin & Drysdale's Tax Controversies and Tax Litigation practices. Prior to joining Caplin & Drysdale, Mr. Matthews practiced tax controversy and litigation at an international law firm. He also served as IRS Deputy Commissioner from October 2003 through December 2006, overseeing a period of unprecedented growth in enforcement activity. He was responsible for the IRS's four civil operating divisions, the Criminal Investigation Division, and the Office of Professional Responsibility, which regulates tax practitioner ethics.


Mr. Matthews focuses his practice on criminal tax enforcement, broad-based civil tax compliance, the Foreign Corrupt Practices Act (FCPA), white collar matters, and anti-money laundering matters. He also advises clients on the IRS voluntary disclosure program, with particular focus on disclosure related to offshore banking accounts.


Mr. Matthews was previously Global Co-Head of Anti-Money Laundering at Deutsche Bank, where he oversaw implementation of the Patriot Act. Prior to that, he was Chief of the IRS Criminal Investigation Division, the agency's investigative and law enforcement arm, renowned for its expertise in investigating financial crime, including tax, money laundering, narcotics, and terrorism-related matters.

Other government positions Mr. Matthews has held include Deputy Assistant Attorney General of the U.S. Department of Justice Tax Division (1994-1998), where he led the Department's criminal tax enforcement program, and Senior Advisor to the Treasury Department's Assistant Secretary for Enforcement (1993-1994), where he was Director of the Treasury Department's Anti-Money Laundering Task Force. Mr. Matthews was also an Assistant U.S. Attorney in the Southern District of New York and then a Deputy Chief of that office's Criminal Division, as well as special assistant to William H. Webster, first at the FBI and then at the CIA.

Awards & Rankings

  • Internal Revenue Service, Commissioner's Award
  • Chambers USA, Leading Lawyer, 2010-Present
  • The Legal 500, Recommended, 2013-Present

Recent News

Click here for a full list of media coverage.

Recent Speaking Engagements

  • Moderator, IRS CI Roundtable, American Bar Association, 31st Annual National Institute on Criminal Tax Fraud & 4th Annual National Institute on Tax Controversy, December 11, 2014
  • Panelist, Option 4 - International Faculty, 2014 STEP Global Congress, November 6, 2014
  • Panelist, Option 6 - International Faculty, 2014 STEP Global Congress, November 6, 2014
  • Speaker, Video Webcast Segment D: Compliance Initiatives/ Voluntary Disclosure, American Law Institute (ALI) CLE, International Trust and Estate Planning, October 21, 2014
  • Speaker, Civil and Criminal Tax Penalties, American Bar Association, 2014 Joint Fall CLE Meeting, September 20, 2014
  • Panelist, New and Improved June 2014 IRS Offshrore Voluntary Disclosure Program - Version 3.0: Including Streamlined Rules That Are A Game Changer, State Bar of California, Webinar, July 17, 2014
  • Speaker, Reports of Subcommittees on Important Developments - Department of Justice Procedures, American Bar Association, 2014 May Meeting, May 10, 2014
  • Chair, Enforcement & Criminal Tax, Federal Bar Association, 38th Annual Tax Law Conference, February 28, 2014
  • Moderator, Life of a Criminal Tax Case: Investigation, Federal Bar Association, 38th Annual Tax Law Conference, February 28, 2014
  • Speaker, Do You Know Where the Money is? Embezzlement and Diversion of Assets in the Electronic Age, Washington Metro Area Corporate Counsel Association, Nonprofits and Associations Forum, December 17, 2013
  • Panelist, Ask the Experts: Criminal Tax Practice Tips and Representation Strategies, American Bar Association, 30th Annual Criminal Tax Fraud and Tax Controversy Conference, December 13, 2013
  • Moderator, IRS CID Roundtable, American Bar Association, 30th Annual Criminal Tax Fraud and Tax Controversy Conference, December 12, 2013
  • Speaker, Intergovernmental Agreements (IGAs): Information Exchange and the Search for Privacy, Institute for International Research, 22nd International Tax and Trust Summit, November 19, 2013
  • Speaker, Course 5B: A Critical Look at the IRS Offshore Voluntary Disclosure Programs - 5 Years Out, University of San Diego School of Law, Procopio International Tax Institute, October 24, 2013
  • Speaker, Basic Criminal Tax Workshop for the Uninitiated, The 48th Annual Southern Federal Tax Institute, October 23, 2013
  • Speaker, Managing Risk in a New Era of International Tax Enforcement, Tax Executive Institute, Houston Chapter, Monthly Luncheon, October 17, 2013
  • Speaker, Update on IRS International Initiatives, Atlanta Tax Forum, September 23, 2013
  • Mark Matthews to Speak at Anti-Fraud & Financial Crimes Conference, KAW, 5th Annual AML/CFT, Anti-Fraud & Financial Crimes Conference, July 8, 2013
  • Speaker, Criminal Investigations/Offshore Reporting, North Carolina Bar Association, 12th Annual North Carolina / South Carolina Tax Section Workshops, May 24, 2013
  • Moderator, Criminal Tax Enforcement Hot Topics: The IRS Perspective, American Bar Association, Webinar, March 20, 2013
  • Chair, Enforcement & Criminal Tax Panel, Federal Bar Association, 37th Annual Tax Law Conference, March 1, 2013
  • Speaker, Through the Looking Glass (Parts I and II): Opting Out of the OVDI Penalty Structure and Litigating FBAR Penalties, American Bar Association, Webinar, January 16, 2013
  • Mark E. Matthews to Speak at ABA Criminal Tax Fraud and Tax Controversy 2012 Meeting, December 6, 2012
  • Mark Matthews to Speak at OffshoreAlert Conference on FATCA, November 26, 2012
  • Speaker, International Tax Enforcement Update, American Institute of CPAs, Small Business Tax Practitioners Conference and AICPA Conference on Tax Controversy, May 2, 2012
  • Speaker, Sensitive Issue Examinations, American Institute of CPAs, Small Business Tax Practitioners Conference and AICPA Conference on Tax Controversy, May 2, 2012

Click here for a full list of speaking engagements.

Recent Publications

Click here for a full list of publications.