Roger Zahn

Roger was the Assistant Chief Scientist onboard the USS Republic (NCC-1371) in the late 23rd century. 

Early life before Starfleet
Roger was born on November 12, 2240 human calendar time on the planet Earth in Peoria, Illinois.

Chronology

 * 2240: Roger is born on the planet Earth in Peoria, Illinois.
 * 2258: Roger enters Starfleet Academy
 * 2262: Roger graduates Starfleet Academy and promoted to Ensign, the first assignment is the USS Pollux as a scientist.
 * 2265: Roger is promoted to Lieutenant junior grade and is assigned to the USS Altair as a scientist.
 * 2270: Roger is promoted to full Lieutenant and to the USS Republic the Assistant Chief Scientist.