Sean Neeson

Sean was the Chief environmental officer onboard the USS Republic (NCC-1371) in the late 23rd century. (Star Trek: The Intrepid Adventures)

Early life before Starfleet
Sean was born on July 13, 2236 human calendar time on the planet Earth in Cork, Ireland.

Chronology

 * 2236: Sean is born on the planet Earth in Cork, Ireland.
 * 2254: Sean enters Starfleet Academy
 * 2258: Sean graduates Starfleet Academy and promoted to Ensign, the first assignment is the USS Eagle as an environmental officer.
 * 2260: Sean is promoted to Lieutenant junior grade and is assigned to the USS El Dorado as an environmental officer.
 * 2265: Sean is promoted to full Lieutenant and is assigned to the USS Excelsior as the Assistant Chief Environmental Officer.
 * 2269: Sean is promoted to Lieutenant Commander and is assigned to the USS Republic as Chief Environmental Officer.