Charlene Winston

Charlie was the Chief Scientist at Starbase 7 in the late 23rd century. 

Early life before Starfleet
Charlie was born on April 5, 2230 human calendar time on the planet Earth in Little Rock, Arkansas.

Chronology

 * 2230: Charlie is born on Earth in Little Rock, North Arkansas.
 * 2248: Charlie enters Starfleet Academy
 * 2252: Charlie graduates Starfleet Academy and is promoted to Ensign, her first assignment is the USS Revere as a scientist.
 * 2255: Charlie is promoted to Lieutenant junior grade and assigned to the USS Kongo as a scientist.
 * 2260: Charlie is promoted to full Lieutenant and is made the Assistant Chief Scientist on the USS Hornet.
 * 2265: Charlie is promoted to Lieutenant Commander and is assigned to the USS Kep Salu as the Chief Scientist.
 * 2270: Charlie is promoted to Commander and becomes Chief Scientist at Starbase 7.