Douglas O'Neal

Doug was the Assistant Chief Navigator onboard the USS Diana (NCC-589) in the late 23rd century. 

Early life before Starfleet
Doug was born on April 29, 2247 human calendar time on the planet Earth in Dublin, Ireland.

Chronology

 * 2247: Doug is born on planet Earth in Dublin, Ireland.
 * 2263: Doug enters Starfleet Academy
 * 2267: Doug graduates Starfleet Academy and promoted to Ensign, the first assignment is the USS Theseus as a Navigator.
 * 2270: Doug is promoted to Lieutenant junior grade and is assigned to the USS Diana as the Assistant Chief Navigator.