Nine days later, the destroyer was en route back to Leyte Gulf. She performed screening assignments and radar picket duties at the entrance to the gulf off Dinagat Island from 6 to 30 November. On the night of 1–2 December, DesDiv 44 made a sweep of the Camotes Sea. At 02:38 on 2 December, "Sigourney" and "Conway" (DD-507) opened fire on a Japanese freighter which sank six minutes later. The destroyers then steamed for the Palau Islands to join the covering force for the invasion of Mindoro. The task group of four battleships, four cruisers, six escort carriers, and 18 destroyers sailed on the 10th. Three days later, the carriers began launching air attacks which continued until 17 December. During the time in the area, the task group was under constant enemy air attack.