Vasch was a male Human military officer, serving in the army of the Sith Remnant in the aftermath of the Jedi Civil War. As of 21,108 AR, he carried the rank of major and was in charge of the garrison stationed at Singularity Base on the planet Malachor V.
When the Galactic Republic attacked Malachor, Major Vasch commanded the ground defenses, coordinating with the surviving Sith Adepts of Trayus Academy under Headmaster Thoriel Silbus. The fighting inside Singularity Base led to heavy infantry casualties on both sides, with Republic ground forces opting to retreat. However, the turncoat Sith Atton Rand and his allies infiltrated the base's control center and activated the Mass Shadow Generator. Whether Major Vasch escaped the planet's subsequent destruction is unknown.