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Sophie Leff focuses her practice on civil litigation in the health care and life sciences sectors. She defends health care and life sciences clients in investigations and litigation brought by federal agencies and qui tam whistleblowers under the False Claims Act (FCA) and similar fraud and abuse laws. Sophie also counsels health systems, provider networks, medical device manufacturers, and digital health and health technology companies on regulatory and compliance matters.

Sophie maintains an active pro bono practice. She works with the Firm's Anti-Human Trafficking Task Force to raise awareness about and mitigate human trafficking-related risks in corporate and health care supply chains. She also represents clients seeking a variety of immigration relief at the trial and appellate levels. Additionally, Sophie works on pro bono criminal appeals and habeas cases.

Sophie serves as an assistant professorial lecturer in law at George Washington University Law School, where she teaches a law school preparation course for incoming law students.


  • Atlantic Health System acquires Saint Peter’s Healthcare SystemJones Day is advising Atlantic Health System in the acquisition of Saint Peter's Healthcare System.
  • Diebold Nixdorf successfully restructures over $2.7 billion in funded debt and completes the first-ever dual proceeding under the U.S. bankruptcy code and Dutch restructuring law in 71 daysIn the first-ever cross border restructuring involving dual main proceedings under chapter 11 of the U.S. Bankruptcy Code and a scheme of arrangement (the "Dutch Scheme") under the Dutch Act on Confirmation of Extrajudicial Plans (Wet Homologatie Onderhands Akkoord ("WHOA")), and the first-ever chapter 15 recognition of Dutch Scheme proceedings and a sanctioned WHOA reorganization plan (the "WHOA Plan"), Jones Day represented Diebold Nixdorf, Incorporated ("Diebold") and certain of its U.S. and Canadian subsidiaries (the "Debtors") in connection with (i) the prepackaged chapter 11 cases of In re Diebold Holding Company, LLC, et al., (Case No. 23-90602-DRJ) commenced on June 1, 2023, in the United States Bankruptcy Court for the Southern District of Texas (the "Bankruptcy Court"); (ii) the Dutch Scheme, commenced on June 1, 2023 by Diebold Nixdorf Dutch Holding B.V. (the "Dutch Issuer") in the District Court of Amsterdam (the "Dutch Court"), and (iii) the chapter 15 proceedings before the Bankruptcy Court commenced by the foreign representative of the Dutch Issuer, wherein the Bankruptcy Court recognized the Dutch Scheme proceeding as a foreign main proceeding and recognized and extended comity to the WHOA Plan that was sanctioned by the Dutch Court.