Liam O'Shea

Liam was the Assistant Security chief at Starbase 134 in the late 23rd century. 

Early life before Starfleet
Liam was born on July 13, 2228 human calendar time on the planet Earth in Cork, Ireland.

Chronology

 * 2228: Liam is born on Earth in Cork, Ireland.
 * 2246: Liam enters Starfleet Academy
 * 2250: Liam graduates Starfleet Academy and is promoted to Ensign, the first assignment is the USS Bridger as a security officer.
 * 2255: Liam is promoted to Lieutenant junior grade and assigned to the USS Exeter as a security officer.
 * 2260: Liam is promoted to full Lieutenant and is made the Assistant Chief Security Officer on the USS Saratoga.
 * 2265: Liam is promoted to Lieutenant Commander and is assigned to the USS Altair as the Assistant Chief Security Officer.
 * 2270: Liam is promoted to Commander and becomes the Assistant Chief Security Officer at Starbase 134.