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Gill, Jonathan O’Neill

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A native New Yorker, Jonathan Gill has practiced law in New York since 1988. He began his career as an assistant district attorney in the Bronx. As a prosecutor in the Major Offense and Homicide Bureaus, he conducted more than 50 jury trials with a 96% conviction rate. Those cases included the examination of expert witnesses in orthopedics, neurology, trauma surgery, pathology, accident reconstruction and other disciplines, a background that serves him well in personal injury and defense litigation.

In addition to serving as a Senior Trial Attorney in the Major Offense & Homicide Bureaus, Mr. Gill was also Deputy Director of Litigation Training for the incoming classes of newly hired ADA's.

In 1997, Mr. Gill joined his future partner as a Senior Trial Associate for the staff counsel office of The Travelers Insurance Company, gaining valuable litigation and management skills.  He prepared and tried major personal injury and wrongful death cases. He also supervised the first in-house, state-wide subrogation team for The Travelers and developed and managed subrogation lines for major cases, including property, auto and workers' compensation cases. Prior to heading up the New York Subrogation Unit, Mr. Gill supervised a team of 10 attorneys and two paralegals that exclusively handled automobile liability litigation. Mr. Gill also created and implemented several training programs for new lawyers.

In 2004, Mr. Gill co-founded Creedon & Gill P.C., with its main office in Northport, New York. A member of the American Bar Association and New York State Bar Association, Mr. Gill is also admitted to practice before the United States District Court (federal court) for the Southern and Eastern Districts of New York. Mr. Gill has lectured on various tort negligence issues for Claim Litigation Management. 

Past Positions

  • Bronx County District Attorney’s Office, Assistant District Attorney
  • The Travelers Insurance Companies, Senior Trial Associate, 1997


  • Claim Litigation Management Award for Excellence
  • Named to the Who's Who list of Top Attorneys in North America for 2020

Current Employment Position

  • Founding Partner

Practice Areas

  • Personal Injury
  • Commercial/Business Litigation
  • Defense Litigation
  • Trusts, Wills & Estates
  • Criminal Defense

Bar Admissions

  • New York, 1989
  • U.S. District Court Eastern District of New York, 1997
  • U.S. District Court Southern District of New York, 1997