Riley MacGray is an Associate with Marks, O’Neill, O’Brien, Doherty & Kelly’s Delaware office. He is admitted to practice in Delaware. He is also a member of the Delaware State Bar Association.

Riley graduated from the University of Delaware in 2016, with a Bachelor of Arts degree in Philosophy. He attended Widener University Delaware Law School, graduating cum laude in 2019. During law school, he was awarded certificates of achievement in Advanced Contracts and International Bankruptcy and was a staff editor for Widener Law Review.

Prior to joining Marks O’Neill, Riley served as a law clerk for various law firms, specializing in employment law, creditor’s rights, personal injury, and professional liability. Riley began with Marks O’Neill as a law clerk during his final semester of law school and worked in this capacity until he passed the Bar and was admitted to practice law in Delaware. Since joining Marks O’Neill in 2019, Riley has assisted in the representation of clients in general, professional, and products liability, as well as bankruptcy.

Outside of work, Riley enjoys running and playing golf, as well as participating in local recreational sports leagues.

Riley B. MacGray
Associate / Delaware

Phone 302-351-2922

Riley B. MacGray PDF


  • J.D., Widener University Delaware Law School, cum laude, 2019
  • B.A., University of Delaware, 2016

Bar Admissions

  • Delaware
  • United States District Court for the District of Delaware

Bar Associations

  • Delaware State Bar Association

Practice Areas

  • Professional Liability
  • Toxic Tort, Mass Tort, Environmental and Products Liability
  • Transportation/Trucking

Representative Cases



300 Delaware Avenue, Suite 900, Wilmington, DE 19801