Travis Mayweather (mirror)

Sergeant Travis Mayweather was a Terran who served aboard the ISS Enterprise as a MACO NCO. 

Before In a Mirror, Darkly
On January 23 2153, Mayweather was one of several Enterprise crewmembers who were in the mess hall to welcome a group of visiting Vissians. During this, an Andorian conscript walked into Mayweather and his guest, so the sergeant ordered Corporal Elizabeth Cutler to punish him. Mayweather then explained to the Vissian, who was concerned about how the Terrans had conquered several more advanced planets, that the Terran Empire confiscated technology from a Vulcan invasion force and simply sought to bring order to chaos. During this, Mayweather had made a Vulcan conscript bring drinks over.

Mayweather later led a detail of MACOs as security when Captain Maximillian Forrest and Commander Archer met the Vissians to discuss a diplomatic incident surrounding Commander Tucker and a Vissian cogenitor. (Before In a Mirror, Darkly)