After loading stores at the Naval Supply Depot, Oakland, Warrick underwent a two-week shakedown out of San Pedro, California, concluding that necessary period of familiarization and training on 25 September.

After fueling on the 27th, Warrick sailed for Manus, joined Tryon (APH-1) en route, and rendezvoused with Task Group (TG) 77.9 on the 28th.

Warrick stopped at Manus from 29 December 1944 to 2 January 1945, before getting underway on the latter day for Lingayen Gulf, on the northern coast of the island of Luzon, in the Philippines.

One hour later, she commenced offloading her cargo, some two days after the first of the Army troops under the overall command of General Douglas MacArthur had splashed ashore at Lingayen.

Taking the boats on board from 1040, Warrick got underway for Leyte Island, joining Task Unit (TU) 78.11.3 formed around Mount McKinley (AGC-7) at 1745.

The attack cargo ship finally commenced unloading operations on the 24th in the transport area four miles off the southeastern coast of Iwo Jima.

Beach-masters were accordingly waving off the LCVP's so that the beaches would not become fouled with the wrecks of numerous landing craft, thus impeding the flow of supplies necessary to keep the marines advancing against the stubborn Japanese defenders.

At that time, Warrick was noting that a strong sea was running with moderate to heavy swells, which, in connection with a good breeze, made unloading conditions decidedly unfavorable.

Soon after the Japanese surrender, the attack cargo ship made two trips from the Philippines to Honshū, Japan, touching at the ports of Aomori, Sasebo, and Yokosuka, carrying men and materiel to support the occupation of the erstwhile enemy's homeland.

She participated in "Operation Magic Carpet" — the return of discharged sailors, marines, airmen, and soldiers to the United States — and later supported the occupation of China and Korea, visiting ports that ranged from Qingdao to Hong Kong; and Shanghai to Sasebo.

After delivering fleet freight, mail, napalm and drop tanks, Warrick set course to rendezvous with other men-of-war in the operating area off Korea's western coast.

Underway for Okinawa at 1326 on 29 October, the ship received radio reports en route of the progress of typhoon "Ruby".

Warned of the critical area, the attack cargo ship remained in the Formosa Strait into the early hours of the 30th, trying to ascertain the progress of the storm.

She unloaded the cargo lifted from Okinawa and discharged the remnants of her fleet issue stores at Sasebo before she got underway on 16 November, bound, once more, for the west coast of the United States.

Departing San Francisco two days before Christmas 1950, Warrick reached Sasebo on 9 January 1951, mooring alongside stores ship Pollux (AKS-4) upon arrival.

She operated in the western Pacific in regular deployments, carrying fleet freight, and touched at the familiar ports such as Sasebo and Yokosuka, as well as Hong Kong and Manila.

After having spent her entire active career with the Pacific Fleet, Warrick commenced her last cruise to the Orient when she departed San Francisco on 28 January 1957.

Her itinerary on the voyage included Yokosuka, Hong Kong, Sasebo, and Subic Bay, before she returned to San Francisco on 30 March.

Struck from the Navy List on 1 July 1961, Warrick was transferred to the Maritime Administration for lay-up at the reserve site at Olympia, Washington.