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Jeff Ansley defends individuals and companies facing high-stakes criminal charges, government investigations, and regulatory enforcement actions.

With more than 30 years of experience, including nearly a decade as a federal prosecutor, Jeff maintains one of the most active federal trial practices in Texas and is known for guiding clients through their most serious legal and business risks.

As former head of the Department of Justice’s Complex Fraud Task Force for the Northern District of Texas, Jeff draws on deep government insight to defend his clients in federal investigations and cases involving the Justice Department, the Securities and Exchange Commission, and U.S. Attorneys’ Offices nationwide. He represents Fortune 500 companies, executives, physicians, and other professionals in matters involving alleged fraud, securities violations, kickbacks, corruption, and corporate misconduct. Jeff also advises clients on immigration-related compliance and employment practices, conducts internal investigations, and handles False Claims Act matters and along with related civil and administrative proceedings.

Clients rely on Jeff to help them avoid liability, minimize business disruption, and protect their reputations. He understands how prosecutors builds cases and uses that perspective to anticipate strategy, narrow exposure, and often resolve matters before charges are filed. His results include high-profile acquittals in cases where the government sought decades of imprisonment and massive financial penalties.

Jeff combines trial-tested courtroom skills with a strategic approach that emphasizes early intervention and practical problem solving. He excels at identifying and leveraging weakness in the government’s case, managing crises with discretion, and balancing strong courtroom advocacy with effective negotiation. His approach consistently delivers outcomes that allow clients to protect their businesses, safeguard their reputations, and move forward with confidence.  

A truly spectacular and gifted attorney. He is thorough, well prepared and absolutely brilliant in the courtroom.
Chambers USA, 2025

Experience

  • Served as lead counsel in federal trial for a physician indicted in an alleged $500 million fraud and kickback scheme. After a month-long jury trial, secured a complete defense verdict, preserving the client’s freedom and professional standing.
  • Represented a public company executive in an SEC and DOJ parallel investigation into alleged securities fraud. Successfully limited the scope of charges, avoided criminal liability, and preserved the client’s role within the company.
  • Served as lead trial counsel in federal trial of pharmacist indicted in a multi-defendant case alleging a multi-million dollar kickback scheme. Following a six-week trial, Jeff’s client was one of only two defendants to be fully acquitted by the jury.
  • As AUSA, led the investigation, prosecution, and months-long trial of the largest Ponzi scheme in the Northern District of Texas. Obtained guilty verdicts and lengthy sentences, demonstrating his courtroom effectiveness and understanding of government strategy.
  • Defended a physician practice group in a False Claims Act case alleging false claims and anti-kickback violations. Negotiated a favorable resolution that resulted in the practice’s continued operations without anu admission of wrongdoing.
  • Represented a business owner charged with immigration violations tied to hiring practices. Resolved the matter short of trial, mitigating criminal exposure and avoiding reputational damage.

Credentials

Education

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

Bar Admissions

  • Texas, 1994

Court Admissions

  • U.S. Court of Appeals, Fifth Circuit, 2009
  • U.S. District Court, Eastern District of Texas, 2008
  • U.S. District Court, Southern District of Texas, 2008
  • U.S. District Court, Western District of Texas, 2008
  • U.S. District Court, Northern District of Texas, 1994

Affiliations

  • Fellow, Texas Bar Foundation
  • Member, Federal Bar Association
  • Member, American Bar Association, White Collar Section
  • Member, Dallas Bar Association, Criminal Law and Securities Law Sections
  • Member, American Health Lawyers Association

Recognition

  • Best Lawyers in America® – Criminal Defense: White-Collar (2018-2026)
  • Chambers USA (Texas) – Litigation: White Collar Crime & Government Investigations, Band 1 (2025-2026)
  • The Legal 500 US – Dispute Resolution: Securities Litigation Defense, Recommended Lawyer (2025)
  • Super Lawyers – White Collar Crimes; Health Care; Securities Litigation (2010-2025)
  • D Magazine – Best Lawyers in Dallas (2019-2025)

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