Christopher P. Conniff


  • JD, Fordham University Law School, 1991; Dean's List
  • BA (Political Science), College of the Holy Cross, 1988


  • New York, 1992
  • Legal Aid Society, Board of Directors
  • New York City Bar Association, Litigation Committee (2012-2013)
  • New York Council of Defense Lawyers, Sentencing Guidelines Committee
  • Expert Guides’ Guide to the World’s Leading White Collar Crime Lawyers (2014)
  • New York Super Lawyers (2013-2015)

Christopher P. Conniff


Christopher Conniff represents clients in investigations and cases involving the full spectrum of white collar criminal and regulatory matters. Drawing on his experience as both a federal prosecutor and a defense attorney, Chris has helped clients navigate a number of recent high-profile government investigations in the areas of insider trading, public corruption, False Claims Act, and FCPA violations. Chris also regularly advises pharmaceutical and medical device companies on a number of compliance-related issues and conducts internal investigations for clients in the United States and internationally. Chris also represents many of his clients in related civil litigations.

Prior to joining the firm, Chris spent six years as an Assistant United States Attorney in the Southern District of New York, where he successfully investigated and prosecuted multiple cases charging a wide array of federal offenses—including RICO, murder, embezzlement, money laundering, fraud, and tax evasion—and argued appeals before the United States Court of Appeals for the Second Circuit. While at the USAO, Chris led the team that prevailed in the highly publicized prosecution of more than 30 members and associates of the Gambino Organized Crime Family of La Cosa Nostra, including the Family’s Acting Boss and Underboss. He also served as lead trial counsel in the successful prosecution of the members of an international arms trafficking organization. Chris’s other significant cases include the prosecution of two founders of a publicly-traded payment services company charged with money laundering in connection with their transfer of billions of dollars from United States customers to overseas internet gambling companies.


  • Representing an institution in a public corruption investigation being conducted by the U.S. Department of Justice.
  • Representing multiple financial services firms in connection with the criminal insider trading investigation by the United States Attorney’s office for the Southern District of New York.
  • Representing numerous clients in joint U.S. and UK-based investigations into the alleged manipulation of various benchmark rates, including LIBOR.
  • Representing a not-for-profit non-sectarian hospital in an ongoing investigation by the U.S. Attorney’s Office for the Eastern District of New York regarding the client’s relationship with certain public officials.
  • Advising a not-for-profit home health care provider in the industry-wide sweep focusing on managed long term care plans in New York.
  • Represented private equity and venture capital firms in state and federal investigations of alleged “pay to play” activities at public pension funds. 
  • Represented an asset manager in connection with an SEC investigation into alleged cross-trading of securities.
  • Defended a major medical device company in connection with alleged FCA claims, including obtaining a summary dismissal of a qui tam action filed in federal court in the Southern District of Texas.
  • Advised an Eastern European investment firm in connection with an international securities fraud investigation.
  • Conducted an overseas FCPA compliance review for a major pharmaceutical company.
  • Defended a major pharmaceutical company in a wide-ranging criminal investigation into off-label promotion and fraudulent marketing.



  • Speaker, “DOJ’s Latest Policy on Corporate Cooperation:What’s Required to Receive Cooperation Credit,” Ropes & Gray Webinar (October 2015)
  • Presenter, “The Civil Frauds Enforcement Landscape: Recent Developments and Trends,” New York City Bar Association (March 2012)
  • Presenter,  “Keeping Out of Trouble: Lessons Learned from Recent Securities Cases,” Foundation For Accounting Education Investment Companies Conference (November 2010)