Sirty, identified as CT-36/732, served as a sergeant within the Galactic Republic's Ord Cestus Squad, a unit of Clone commando soldiers, during the Clone Wars. His specialty was in logistics. During 21 BBY, Sirty participated in an exhibition of a JK security droid held at the T'Chuk Colliseum located on Coruscant. The JK defeated him rapidly, in less than 42 seconds. Following this short fight with the bio-droid, Nate enlisted him to be a squad member on a mission with the goal of destroying the JK droid production facilities on Ord Cestus.