T: 469.391.7415
F: 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 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 — sometimes 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.


  • D CEO Magazine's 500 Most Powerful Business Leaders in Dallas-Fort Worth, 2017-2018
  • D CEO Magazine's Dallas 500 Law - White Collar Criminal
  • Defense in Dallas-Fort Worth, 2016
  • National Law Journal, White Collar Crime Trailblazers of 2015
  • Texas Super Lawyers, Texas Monthly, 2006-2016
  • Best Lawyers in Dallas, D Magazine, 2008-2017
  • The Best Lawyers in America®, 2010-2018
  • 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


  • 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)

Media Mentions


  • Adjunct Professor, Texas Tech School of Law, 1995-2002, 2006-2012
  • American Bar Association, 1986-2000, 2005-present
  • American Health Lawyers Association, 2016-present
  • Dallas Bar Association, 1986-1991, 2005-present
  • 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
  • Texas Criminal Defense Lawyers Association, 2005-present
  • Texas Disciplinary Rules of Professional Conduct Committee, 2006-2009
  • Texas Bar Foundation, 1997-present
  • Texas Young Lawyers Association, 1986-2000
  • Texas Tech Law School Foundation, Trustee, 2016-present