Sydney Fetten is Of Counsel with Marks, O’Neill, O’Brien, Doherty & Kelly’s New York City office.  She is admitted to practice in New Jersey, as well as the Southern District of New York, the Eastern District of New York and the Western District of New York.  She is also a member of the American and New Jersey Bar Associations.

Sydney graduated from George Washington University in 2012, summa cum laude and Phi Beta Kappa, with a Bachelor of Arts in International Affairs.  She then attended Fordham Law School, graduating in 2015.  During law school, Sydney was a member of the Fordham Urban Law Journal, a competitor and competition editor for the Dispute Resolution Society and a recipient of the Archibald R. Murray Public Service Award.  Also during law school, Sydney gained experience serving in Fordham Law’s Appellate Litigation and Mediation Clinics and working as a research assistant.  During her second year of law school, she won First Place Award for Outstanding Individual Mediator at the International Law School Mediation Tournament, hosted by the International Academy for Dispute Resolution in Chicago.  Her third year of law school, Sydney coached students that won First Place Award for Outstanding Advocate-Client Team in the same tournament in London.

Since joining Marks O’Neill in 2015, Sydney has represented clients in general litigation, premises liability and professional liability.

Sydney enjoys recreationally competitive distance running, and has completed several marathons and numerous half-marathons.

Sydney A. Fetten
Of Counsel / New York City

Phone 646-454-4862

Sydney A. Fetten PDF


  • J.D., Fordham Law School, 2015
  • B.A., The George Washington University, 2012

Bar Admissions

  • New Jersey
  • Southern District of New York
  • Eastern District of New York
  • Western District of New York

Bar Associations

  • American Bar Association
  • New Jersey Bar Association

Practice Areas

  • Casualty Group
  • Construction Accident/Construction Defect

Representative Cases



New York City
600 Third Avenue, Suite 1501, New York, NY 10016