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Jeff is one of the few attorneys in the country with the distinction of serving as a special agent for the FBI, a federal prosecutor, a lawyer in private practice with a large law firm, and U.S. Attorney.

Jeff’s unique combination of credentials gives him a 360-degree perspective on client challenges, allowing him to identify the underlying facts of investigations and litigation in order to efficiently determine the appropriate course of action. He has secured favorable results for clients, both in enforcing client rights and defending against a wide array of civil, regulatory, and law-enforcement agencies. Jeff has conducted more than 150 internal investigations involving a wide variety of issues.

Jeff began his career as a Certified Public Accountant (CPA) for PricewaterhouseCoopers, and he calls upon this early experience in matters involving alleged financial malfeasance, as well as in instances where clients are victims of fraud or other financial crimes. Whether in the context of an internal investigation or responding to enforcement actions, Jeff develops plans of action that align with client objectives in response to a wide variety of issues.

Jeff served as an FBI special agent in St. Louis for 10 years and as a federal prosecutor for another decade when he led prosecutions of notorious securities and corporate fraud cases. In 2017, he was named U.S. Attorney for the Eastern District of Missouri, the District’s top-ranking federal law enforcement official, and directed an office with 70 criminal and civil attorneys. Jeff oversaw thousands of federal prosecutions in the District, including those related to white-collar crime, public corruption, terrorism, organized crime, firearms and narcotics. He also led the office in defending the United States in civil cases and collecting debts owed to the United States. Further, Jeff served on the Attorney General’s Advisory Committee, representing U.S. Attorneys from the Eighth Circuit.



  • Benchmark Litigation, Local Litigation Star, 2023
  • Chambers USA, Litigation: White Collar Crime & Government Investigations, 2022
  • Missouri Lawyers Media, POWER List for White Collar Defense, 2022
  • The Best Lawyers in America, Criminal Defense: White Collar, 2018
  • Martindale-Hubbell AV Preeminent
  • Federal Bureau of Investigation Agents Association, The Founders Award, 2015


  • J.D., Saint Louis University School of Law
    • magna cum laude
  • B.S., Indiana University
    • Accounting
    • cum laude


  • Missouri
  • U.S. District Court, Eastern District of Missouri
  • U.S. District Court, Western District of Missouri
  • U.S. District Court, Southern District of Illinois
  • District of Columbia
  • U.S. Court of Appeals, Eighth Circuit

Professional Memberships and Certifications

  • National Association of Former United States Attorneys
  • Federal Bar Association – St. Louis Chapter
  • Former FBI Agents Association
  • Oversaw thousands of criminal and civil cases as U.S. Attorney in the Eastern District of Missouri.
  • Appointed by U.S. Attorney General to review the FBI's investigation of the National Security Advisor.
  • Prosecuted and oversaw the prosecution of numerous cybersecurity, computer intrusion, and ransomware attacks.
  • Represented private and public companies in navigating cybertheft incidents and undisclosed disclosures, including regulatory response.
  • Achieved favorable results in U.S. District Court, Western District of Texas, for executive at medical device manufacturing company against allegations of a $700 million fraud scheme.
  • Defended executive against allegations by the DOJ and the SEC in securities fraud matter related to expert network and hedge fund trading on the New York Stock Exchange (NYSE).
  • Defended many publicly traded companies against whistleblower allegations investigated by the DOJ, SEC, and other federal regulators.
  • Represented “Big Four” accounting firm investigated by the Department of Justice (DOJ) and the SEC in relation to audits of a failed financial institution.
  • Represented global supply manager of multinational computer technology company who provided insider information to hedge fund traders through an expert networking firm (U.S. District Court, Southern District of New York). The client received probation in the criminal case. No incremental punishment was handed down by the SEC in the related civil matter.
  • Settled matter with the Securities and Exchange Commission (SEC) in the first case enforcing muni advisers’ fiduciary duties.
News Releases | August 02, 2021
Gregg N. Sofer Joins Husch Blackwell's White Collar Team

Gregg N. Sofer becomes the latest high-profile arrival for Husch Blackwell’s White Collar, Internal Investigations & Compliance practice group.

Community Leadership
  • Independence Center, Board Member
  • Urban League of Metropolitan St. Louis, Board Member