Dirjo Harch served the Galactic Empire within its transmission processing unit, specifically for Project Swarm. His role involved the hunt for the Rebel Alliance through the utilization of probe droids. At the time of his involvement with Project Swarm, Harch was a recent addition to the Imperial forces and had not yet achieved any significant promotions. He assumed leadership of the Swarm processing team and showed great enthusiasm in conveying the achievements of his fellow worker Maela to Captain Firmus Piett.