Katherine Martin

Kat was the Chief Tactical officer at Starbase 7 in the late 23rd century. 

Early life before Starfleet
Kat was born on June 10, 2230 human calendar time on the planet Earth in Long Beach, California.

Chronology

 * 2230: Kat is born on Earth in Long Beach, California.
 * 2248: Kat enters Starfleet Academy
 * 2252: Kat graduates Starfleet Academy and is promoted to Ensign, her first assignment is the USS Bowie as a weapons officer.
 * 2255: Kat is promoted to Lieutenant junior grade and assigned to the USS Lexington as a weapons officer.
 * 2260: Kat is promoted to full Lieutenant and is made the Assistant Chief Weapons Officer on the USS Krieger.
 * 2265: Kat is promoted to Lieutenant Commander and is assigned to the USS Betelgeuse as the Chief Weapons Officer.
 * 2270: Kat is promoted to Commander and becomes Chief Tactical Officer at Starbase 7.