Thelsa

Lt. Thelsa was a Scientist onboard the USS Intrepid (NCC-1738) in the late 23rd century. 

Early life before the Intrepid
Thelsa was born on November 1, 2244 human calendar time on the planet Andor.

Chronology

 * 2244: Thelsa is born on planet Andor.
 * 2260: Thelsa enters Starfleet Academy
 * 2264: Thelsa graduates Starfleet Academy and promoted to Ensign, his first assignment is the USS Pegasus as a Scientist.
 * 2267: Thelsa is promoted to Lieutenant junior grade and is assigned to the USS Andor.
 * 2270: T'Sara is promoted to full Lieutenant and is assigned to the USS Intrepid as a Scientist.