Dylan O'Connor was a lawyer in Starfleet service in the 25th century assigned to Unity Three Starbase.
He signed the 0L Pledge for European Law School Transparency for Ireland, swearing not to attend a law school in the European Alliance in the process. He ended attending Cogley Law School and revealed his signature on the Pledge at Live from the Lyran Frontier alongside fellow signatory Dunames Lopez. (Star Trek: False Vacuum: "Pledge of the Protester")