Ann E. Querns


Ann E. Querns focuses her practice on complex corporate litigation and white-collar defense matters. She has experience counseling clients on a wide range of business issues, including:

  • Contracts
  • Fraud
  • Business torts
  • Trade secrets
  • Antitrust issues
  • E-discovery

She also represents both corporations and individuals in criminal enforcement actions and internal corporate compliance investigations.

Ann participates in the Firm's associate mentoring program and is a member of the Firm's Blockchain Technology & Digital Currencies group.

Ann served as law clerk to the Honorable R. Barclay Surrick of the U.S. District Court for the Eastern District of Pennsylvania.  While in law school she was a member of The George Washington University International Law Review and the Mock Trial Board.  Ann also interned for the homicide division of the United States Attorney's Office in Washington, D.C., and for the Honorable Garrett E. Brown, Chief Judge of the U.S. District Court for the District of New Jersey.

Outside the Firm

Ann loves the outdoors and practices yoga every chance she gets.


  • Conducted internal investigations for publicly-held corporations into whistleblower allegations of fraud by employees and corporate officers.
  • Represented generic pharmaceutical companies in various capacities, including defending allegations of antirust violations, defending national mass tort litigation, and enforcing contracts. 
  • Represented an individual accused of fraudulently competing for government contracts.
  • Represented psychologists involved in creating and implementing the CIA's Enhanced Interrogation Technique Program, in connection with claims brought pursuant to the Alien Tort Statute.
  • Represented a global medical device company, in multiple matters involving prosecuting violations of non-competition agreements, theft of trade secrets, unfair competition, fraud, and false advertising under the Lanham Act.
  • Represented economists, in their submission of an amicus brief to inform the Second Circuit of economic policies and principles relevant to an antitrust dispute involving “product hopping” by a brand name pharmaceutical manufacturer.

Pro Bono Work

  • Secured a settlement from the City of Philadelphia for a state prisoner who brought claims against correctional officers for the violation of his civil rights.
  • Represented indigent client in premises liability claim brought against her in Philadelphia. 


  • 2022, Pennsylvania “Rising Star” in Business Litigation, listed in Super Lawyers®
  • 2021–2022, Ones to Watch, Criminal Defense: White-Collar, listed in Best Lawyers in America©
  • 2015, Blank Rome’s Citizenship Award for providing outstanding client service



  • American Bar Association
  • Pennsylvania Association of Criminal Defense Lawyers



  • Pennsylvania
  • New Jersey
  • U.S. District Court - Eastern District of Pennsylvania
  • U.S. District Court - New Jersey
  • United States Court of Appeals for the Second Circuit


  • Rutgers, the State University of New Jersey at New Brunswick, BS, summa cum laude
  • George Washington University Law School, JD, with honors