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Jeffrey J. Ansley

Jeff Ansley is a white collar trial lawyer and the head of Bell Nunnally’s White Collar Criminal and Regulatory Defense practice. Before joining the firm, he served as both an Assistant United States Attorney for the Northern District of Texas and Enforcement Attorney for the United States Securities and Exchange Commission.

Jeff focuses his practice on white collar defense, representing professionals and corporate clients in high stakes investigations and cases before federal prosecutors and in court when the time comes. As a former federal prosecutor, he has an insider’s knowledge of the tactics and resources used by prosecutors and investigators, and so knows how to combat them. Jeff has long been a white collar trial lawyer with a special focus on health care fraud, securities enforcement, and other alleged business crimes.

Jeff represents targets of government health care investigations and prosecutions. His clients include physicians, hospitals, compounding pharmacies and their personnel, and medical organizations and suppliers. In doing so, he has significant experience with matters handled by the Department of Justice, the Medicare Fraud Strike Force, the Department of Defense, and the Health and Human Services - Office of Inspector, among others. Jeff also counsels clients in securities enforcement cases arising from securities offerings and stock trading activities, representing officers, directors, independent committees and boards, and other professionals in high-stakes securities cases. This experience makes him uniquely qualified to handle not only these investigations and charges, but also the collateral regulatory, administrative and civil consequences that often come with them.

He also handles federal and state administrative actions instituted by securities and health care regulators, including acting as counsel for corporations and their officers and directors, physicians and physician groups, broker-dealers, investment advisers, and other professionals and organizations.

Jeff also conducts internal investigations on behalf of corporate clients involving allegations of securities, health care, and tax fraud, employee misconduct, possible violations under the Federal Corrupt Practices Act, and trade secret theft violations, among other suspected misconduct. In addition, he develops compliance and ethics programs for corporations and other business entities. Texas Monthly and D Magazine have consistently recognized him for his white collar and regulatory defense practice.

Government Experience

  • Assistant U.S. Attorney in the Major Fraud and Public Corruption Section of the United States Attorney’s Office for the Northern District of Texas. As a federal prosecutor, Jeff successfully tried and prosecuted some of the most complex fraud cases in the Northern District. He also led the Securities Fraud Task Force for the District, coordinating the actions of a multi-agency criminal and regulatory task force.
  • Special Assistant U.S. Attorney for the Northern District of Oklahoma, where he investigated and successfully tried the architects of one of the most sophisticated securities frauds seen in that District.
  • Enforcement Attorney for the SEC's Fort Worth Regional Office, where he prosecuted a wide variety of suspected federal securities laws violations, including possible financial and accounting fraud, insider trading, offering frauds, registration violations and regulatory compliance matters.


  • J.D., Southern Methodist University Dedman School of Law, 1994
  • B.A., cum laude, Texas A&M University, 1991


  • State Bar of Texas
  • United States District Courts for the Northern, Southern, Eastern and Western Districts of Texas
  • United States District Courts for the Northern District of Oklahoma
  • United States Court of Appeals for the Fifth Circuit
  • Ranked in the Chambers USA 2021 legal directory in Band 3 of the “Litigation: White-Collar Crime & Government Investigations” category for Texas.
  • Named one of the "Litigation Stars" in the Benchmark Litigation 2020 Guide.
  • Featured in Best Lawyers®’ Texas' Best Lawyers, 2020.
  • Ranked in the Chambers USA 2020 legal directory in Band 3 of the “Litigation: White-Collar Crime & Government Investigations” category for Texas.
  • Successfully defended a pharmacist at trial against federal conspiracy to commit health care fraud and illegal kickback charges.
  • Selected by attorney peers for inclusion in The Best Lawyers in America®, 2018-2022.
  • One of six attorneys honored for White Collar Criminal Defense Law in the Dallas 500 list ("The Most Powerful Business Leaders in Dallas - Fort Worth") by D CEO Magazine, 2018.
  • Named one of the "Best Lawyers in Dallas" by D Magazine, 2014, 2015, 2017, 2018, 2019 and 2021.
  • Selected by attorney peers for inclusion in Texas Super Lawyers®, 2010-2020.
Activities & Memberships
  • State Bar of Texas
  • Texas Bar Foundation, Fellow
  • Federal Bar Association
  • American Bar Association, White Collar Section
  • Dallas Bar Association, Criminal Law and Securities Law Sections
  • American Health Lawyers Association
  • 2020 Webinar: "Spotting the Red Flags: How to Protect Your Company from PPP Fraud Prosecution," Dallas Bar Association, December 9, 2020.
  • 2020 Webinar: "Legal Panel: Prosecutor, Defense Attorney, and Judge Discuss Fraud and White Collar Crime," DFW Fraud Conference, September.
  • 2020: Webinar, "The Aftermath of an Acquittal - How a Three Year Health Care Fraud Investigation Resulted in 'Not Guilty,'" February.
  • 2019: Speaker, “Criminal Developments,” 6th Annual Government Enforcement Institute, September.
  • 2018: Webinar, "Preparing for Healthcare Investigations," November.
  • 2017: Speaker, “Healthcare Enforcement Issues: Civil and Criminal Developments,” The University of Texas School of Law’s 4th Annual Government Enforcement Institute, October.
  • 2016: Speaker, "Essential Information for a Rapidly Changing World," Bell Nunnally CLE Seminar, June
  • 2015: "What You Should Know About Federal Antitrust Enforcement," presented to Trinity Industries, June 30, 2015
  • 2014: Speaker, “Inside the Insider Trading Trial of Mark Cuban,” The Texas Lawbook CLE Presentation
  • 2010: Speaker, “What In-House Counsel Needs to Know about White Collar Issues,” State Bar of Texas 9th Annual Advanced In-House Counsel Course
  • 2009: Speaker, “Preventing White Collar Prosecutions,” International Association of Defense Counsel Annual Meeting
  • 2009: Speaker, “White Collar Prosecutions: What to Do When the Government Comes Calling,” Human Resources Roundtable
  • 2009: Speaker, “Corporate Compliance in the Government Age: When Compliance Leads to Law Enforcement,” Texas General Counsel Forum, September
  • 2008: Speaker, “Saving the Attorney-Client Privilege: Cooperating Without Caving In,” South Texas Law School Forum on White Collar Crime
  • 2008: Speaker, “Your Company’s Exposure Abroad: The Foreign Corrupt Trade Practices Act,” Organization for Women in International Trade, June

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