Photo of Bill  Mateja

Bill Mateja

F: +1.469.391.7559


  • J.D., Texas Tech University School of Law, 1986
  • B.S., University of Notre Dame, 1983
  • Texas
  • United States Supreme Court
  • U.S. Court of Appeals, Fifth Circuit
  • U.S. District Court, Northern District of Texas
  • U.S. District Court, Eastern District of Texas
  • U.S. District Court, Western District of Texas
  • U.S. District Court, Southern District of Texas
Thought Leadership


Bill Mateja is a partner in the Government Contracts, Investigations & International Trade Practice Group in the firm's Dallas office. He specializes in White Collar Defense and Corporate Investigations.

Areas of Practice

Unlike many attorneys, Bill Mateja does not expect repeat business. Clients he works with are usually facing the kinds of high-stakes, high-stress problems that are not likely to recur — a financial services company under SEC investigation, a hospital accused of Medicare fraud, or a C-suite executive charged with fraud or insider trading. These clients turn to Bill to address and resolve the issues, while minimizing the impact to their businesses and reputations.

Bill has long been a white collar trial lawyer with a particular focus on healthcare fraud and securities enforcement. A former prosecutor at the highest levels of the Department of Justice, Bill was responsible for all the Department’s white collar operations, as well as the day-to-day workings of its corporate fraud task force. He also served as Special Counsel for Health Care fraud overseeing all of the Department’s health care fraud enforcement. This experience makes him unusually adept at handling the collateral consequences of white collar matters, which can occur in any of four separate legal forums — criminal, civil, administrative, and regulatory — sometime all at once.

Bill has a deep understanding of each of these forums, and he regularly demonstrates that “the best defense is a good prosecutor.” He maintains strong relationships in U.S. Attorney’s Offices around the country, as well as at the SEC and various state and federal enforcement agencies nationwide. The benefit to clients is that Bill not only thinks like a prosecutor, but at times, he is a contemporary to the prosecutor or investigating attorney assigned to his case. His goal in every matter is to see that business continues with the least amount of disruption, and that each individual receives not only an aggressive defense, but one that is acceptable and comfortable for the client.

Government Experience

  • Senior Counsel to Deputy Attorneys General, Larry Thompson and James Comey, Office of the Deputy Attorney General, U.S. Department of Justice (Washington, D.C., 2003-2004)
  • Point Person, President George W. Bush’s Corporate Fraud Task Force
  • DOJ Special Counsel for Health Care Fraud
  • National oversight over and coordination of the Department of Justice’s, (1) white collar functions, including health care enforcement, (2) relationship with the U.S. Sentencing Commission and matters relating to the U.S. Sentencing Guidelines, and (3) efforts to combat violent crime, including oversight over the Bureau of Alcohol, Tobacco and Firearms and Project Safe Neighborhoods
  • Counsel to the Director, Executive Office for United States Attorneys, U.S. Department of Justice (Washington, D.C., 2002-2003)
  • Legal Evaluator, Executive Office of U.S. Attorney’s Evaluation and Review Staff (2000-2004) Assistant U.S. Attorney, Northern District of Texas, U.S. Department of Justice (1991-2004)


  • D CEO Magazine's 500 Most Powerful Business Leaders in Dallas-Fort Worth, 2017 and 2018
  • D CEO Magazine's Dallas 500 Law - White Collar Criminal Defense in Dallas-Fort Worth, 2016
  • Texas Tech School of Law 2016 Distinguished Alumni Award
  • White Collar Crime Trailblazers of 2015, National Law Journal
  • Texas Super Lawyers, Texas Monthly, 2006-2018
  • Best Lawyers in Dallas, Criminal Defense: White CollarD Magazine, 2008-2019
  • Best Lawyers in Dallas, Criminal Defense: White CollarD Magazine, 2009
  • The Best Lawyers in America®, Commercial Litigation, 2010, 2017-2019
  • The Best Lawyers in America®, White Collar Litigation, 2011
  • The Best Lawyers in America®, Litigation - Regulatory Enforcement (SEC, Telecom, Energy), 2012-2019
  • The Best Lawyers in America®, Litigation - Securities, 2014-2019
  • Honorary Special Agent, Department of Treasury Inspector General for Tax Administration, 2003
  • Certificate of Appreciation, Texas Comptroller of Public Accounts, Criminal Investigative Division, 2003
  • Director’s Award for Superior Performance as an Assistant U.S. Attorney, Executive Office for United States Attorneys, 2001
  • Merit Award, Bureau of Alcohol, Tobacco and Firearms, 2000
  • Merit Award, Bureau of Alcohol, Tobacco and Firearms, 1998
  • Director’s Award, Texas Department of Public Safety, 1998
  • Honorary Special Agent, Criminal Investigation Division of Internal Revenue Service, 1998


Key Matters

  • Currently representing Texas’ Attorney General in connection with a state criminal securities fraud prosecution.
  • Successfully represented Missouri's former governor in connection with a federal investigation regarding unsubstantiated allegations of political patronage
  • Successfully represented multiple individuals and companies in connection with various SEC insider trading, accounting fraud, and other investigations
  • Conducted tens of corporate internal investigations involving subjects as varied as vendor kickback schemes, illegal bribes and gratuities, Foreign Corrupt Practices Act, and insider trading by a company’s chief executive officer.
  • Conducted the internal investigation of a Chief Compliance Officer of a national health care provider who intended to be a whistleblower under the False Claims Act.
  • Successfully represented numerous companies and individuals in connection with federal and state whistleblower lawsuits and resulting civil and criminal investigations conducted by HHS-OIG, the FBI, U.S. Attorney’s Offices, and state Medicaid officials.
  • Successfully represented numerous individual healthcare providers in indicted criminal cases, federal and state healthcare fraud investigations, and matters before state medical boards.
  • Made numerous criminal referrals to prosecutors and regulatory agencies in matters involving trade secret theft, embezzlement, dealing with prohibited countries, money laundering, and other alleged criminality.
  • Successfully represented multiple oil and gas promoters before federal and state securities regulators to beat back charges that their sponsored joint ventures constituted “securities” under federal and state law.
  • Successfully represented multiple physician and dental practice groups in connection with numerous Medicare and Medicaid fraud investigations.
  • Successfully represented multiple healthcare providers and DME/pharma interests in Anti-Kickback, Stark Act, off-label promotion and False Claims Act investigations and cases.
  • Successfully represented multiple companies civilly and criminally in connection with a departing employee’s alleged theft of corporate trade secrets.
  • Obtained the dismissal of a state securities fraud case against a University of Texas professor
  • Obtained a deferred prosecution of $900 million window and door manufacturer in connection with an ICE worksite enforcement prosecution; obtained dismissal of restaurant manager in federal criminal case involving allegations of hiring of illegal aliens.
  • Successfully represented a major, publicly-traded medical provider and leading home- and community-based service provider to the mentally ill in a joint federal/state whistleblower lawsuit alleging millions of dollars in damages.
  • Counseled numerous companies on compliance with the Foreign Corrupt Practices Act and federal export laws.
  • Counseled numerous companies on compliance with the Heath Insurance Portability and Accountability Act (HIPAA).
  • Represented a West Texas agribusiness in a major criminal and civil False Claims Act prosecution and investigation.
  • Represented the former chairman of the board of a publically traded company before the Delaware Chancery Court in a shareholder derivative action.
  • Served as a AAA arbitrator in two arbitrations, one of which was an arbitration involving a hospital and claims administrator.
  • Successfully represented a $900 million manufacturing concern in connection with parallel criminal and SEC investigations involving allegations of accounting fraud and self-dealing.
  • Represented significant business concerns in connection with insurance coverage disputes
  • Represented Innovation First, Inc., in suing the Dominion Multiple Employer Welfare Benefit Trust and American General Life Insurance Company, among others, in connection with Innovation First’s participation in the Trust.
  • Counseled a debt consolidation business on compliance matters, including compliance with various FTC regulations.
  • Represented a money transmitting business in a federal unlicensed money transmitting business prosecution.
  • Represented an individual before DOJ’s Office of Pardon Attorney and in connection with his application for a federal pardon.
  • Successfully represented multiple individuals in connection with mortgage fraud investigations and prosecutions.
  • Counseled significant life insurance company on anti-money laundering and OFAC compliance.

Thought Leadership


Government Contracts, Investigations & International Trade Blog Posts

Media Mentions

Speaking Engagements

  • Speaker, "Discovery in Federal Criminal Cases and The Travel Act," Federal White Collar Crime Seminar, Fort Worth, TX, October 5, 2018
  • Moderator, "Winning In The Courtroom - A Conversation With Dan Cogdell," Dallas Bar Association Trial Skills Section, December 15, 2017
  • Co-Presenter, "Better to Give Than to Receive: Prosecuting and Defending Bribery and Corruption Cases Post-McDonnell," American Bar Association's Southeastern White Collar Crime Institute, GA September 7, 2017
  • "Healthcare Fraud Update," ABA White Collar Crime North Texas Subregional Event, February 10, 2017
  • "Internal Investigations: Best Practices for Preparing for and Responding to Potential Claims," EBEC National Event, Fort Worth, TX, November 10, 2016
  • "Healthcare Fraud in Payments – An Open Payments & Fraud and Abuse 2016 Mid-Year Review," IMS Health U.S. Transparency Conference; Morristown, NJ, October 6, 2016
  • "Internal Investigations: Best Practices for Preparing for and Responding to Potential Claims," EBEC National Event, Denver, CO, September 28, 2016
  • "Forum on U.S. Attorneys," TTU Law School; Lubbock, TX, September 21, 2016
  • "Evolution of the Dallas-Ft. Worth White Collar Bar as Told by Its Founders," ABA White Collar Crime North Texas Subregional Event, September 16, 2016
  • "From Subpoenas to Search Warrants: What Corporate GCs Need to Know About Criminal Investigations," GC Netweavers; Dallas, TX, September 15, 2016
  • "Top 10 Things on the DOJ and OIG’s Bad List," 2016 Annual Healthcare Dealmakers Conference, Dallas, TX, May 26, 2016
  • "Parallel Proceedings: What Civil Defense Counsel Need To Know About Title 18 And Other Criminal Law Issues," TADC Winter Seminar; Telluride, CO, January 28, 2016
  • "What Civil Lawyers Need To Know About Criminal Law," Dallas Bar Association, Trial Skills Section; Dallas, TX, November 17, 2015
  • "Sez who? SEC Targeting Attorneys Who Allegedly Obstruct Enforcement Investigations," American Bar Association, Ninth Annual Institute on Securities, New Orleans, LA, November 14, 2014
  • "Recent Trends in Healthcare Enforcement Cases," University of Texas School of Law Government Enforcement Institute, Dallas, TX May 21, 2014
  • "Work Site Enforcement/I-9E-Verify for Experts," ILW Webinar, March 13, 2014
  • "2014 Insider Trading Update and The Mark Cuban Trial," Houston Bar Association, Securities Litigation and Arbitration Section, Houston, TX Dallas Bar Association Securities Section; Dallas, TX, February 2014
  • "Federal Jury Trials," Dallas Bar Association, Trial Skills Section, Dallas, TX, November 22, 2013
  • "Healthcare Fraud Enforcement in North Texas," Dallas Bar Association, Health Law Section, Dallas, TX, November 20, 2013
  • "Getting to Non-Prosecution: Effective Strategies for Making the Best Case for Individual and Corporate Clients," American Bar Association, Eighth Annual Institute on Securities Fraud, New Orleans, LA, October 24, 2013


  • Adjunct Professor, Texas Tech School of Law, 1995-2002, 2006-2012
  • American Bar Association, 1986-2000, 2005-present
  • Co-Chair, American Bar Association, North Texas-Oklahoma Subcommittee of the Criminal Justice Section’s White
  • Collar Crime Committee, American Bar Association, 2006-present
  • Criminal Justice Section Book Board, American Bar Association, 2013-present
  • Criminal Justice Section Upjohn Working Group, American Bar Association, 2008, 2009
  • Criminal Justice Section Parallel Proceedings Task Force, American Bar Association, 2010-2012
  • Member of Criminal Justice Section, American Bar Association, 2005-present
  • Texas Delegate, Young Lawyers Division, American Bar Association, 1996-1999
  • American Health Lawyers Association, 2016-present
  • Dallas Bar Association, 1986-1991, 2005-present
  • Dallas Bar Association, Director, Board of Directors, Dallas Bar Association, 2015–present
  • Co-Chair, 2015 Equal Access to Justice Campaign,
  • Chair, Trial Skills Section 2011-2012; Immediate Past-Chair 2013-2014, Vice Chair 2009-2010, Dallas Bar Association
  • Director, Dallas Bar Association, 2007-present
  • Secretary-Treasurer, Dallas Bar Association, 2009-2010
  • Co-Chair, Bench Bar Committee, Dallas Bar Association, 2008
  • Dallas Bar Foundation, 2006­-present
  • Dallas Young Lawyers Foundation, 2005-­present
  • Lubbock County Bar Association, 1991­-2004
  • Lubbock County Defense Lawyers Association, 2010-present
  • Health Care Compliance Association, 2010-present
  • National Association of Assistant U.S. Attorneys, 1995-­2004
  • National Association of Criminal Defense Lawyers, 2005-present
  • Vice Chair, White Collar Crime Committee, National Association of Criminal Defense Lawyers, 2006-2008
  • Texas Criminal Defense Lawyers Association, 2005-present
  • Texas Disciplinary Rules of Professional Conduct Committee, 2006-2009
  • Texas Bar Foundation, 1997-present
  • Co-Chair, Dallas Nominating Committee, Texas Bar Foundation, 2014-2015
  • Board of Trustees, Texas Bar Foundation, 1997-1998
  • Fellow and Sustaining Fellow, Texas Bar Foundation, 1997-present
  • Texas Young Lawyers Association, 1986-2000
  • Texas Young Lawyers Association, President, 1997-1998; Immediate Past President, 1998-1999; President Elect, 1996- -1997
  • Chair, Liberty Bell Committee, Texas Young Lawyers Association, 2000-2001
  • Chair, Outstanding Young Lawyer of Texas Committee, Texas Young Lawyers Association, 1999-2000
  • Board of Directors, Texas Young Lawyers Association, 1995-1999
  • Regional Coordinator for Disaster Legal Services, Texas Young Lawyers Association, 1995-1999
  • Texas Tech Law School Foundation, Trustee, 2016-present