"Sigourney" and her squadron continued operations with TF 31 until 6 May 1944. The destroyer participated in antisubmarine sweeps, barge hunts, and in combined operations with PT boats and supporting aircraft. In February 1944, the destroyer was a unit in the Green Islands Attack Group which landed New Zealand troops there on the 15th. On the night of 29 February–1 March, "Sigourney", with DesRon 22, engaged in an antishipping sweep of Simpson Harbor and then bombarded Rabaul and the airfield on Duke of York Island in the Bismarck Archipelago.