Mac Ewevs was a captain in the Stormtrooper Corps, specifically a storm commando, during the time of the Galactic Civil War. He was a Human male.
Captain Ewevs, along with a group of other highly skilled soldiers, was employed by Purton, the Governor of Concord Dawn, in 1 BBY with the task of assassinating the bounty hunter known as Boba Fett. This squad was unsuccessful in their mission, and Fett subsequently located and apprehended Mac Ewevs on the planet Blackfel.