Sadak

Dr. Sadak was the chief medical officer onboard the USS Defiant (NCC-1731) in the late 23rd century. (Star Trek: The Intrepid Adventures)

Early life before Starfleet
Dr. Sadak was born on January 10, 2230 human calendar time on Vulcan.

Chronology

 * 2230: Sadak is born on Vulcan.
 * 2246: Sadak enters Starfleet Academy
 * 2250: Sadak graduates Starfleet Academy and promoted to Lieutenant, his first assignment is the USS Intrepid as a Doctor.
 * 2260: Sadak is promoted to Lieutenant Commander and is assigned to the USS Darius as the Chief Medical Officer.
 * 2269: Sadak is promoted to Commander and becomes Chief Medical Officer the USS Defiant.