From Wellington, New Zealand Ormsby steamed via Efate to Tarawa, Gilbert Islands and landed her troops there for that historic battle on 20 November 1943.

Following this operation, she moved on to Guadalcanal in February and trained Army units until 28 March, when she landed reinforcements at Bougainville and continued to Milne Bay, New Guinea.

Returning to the Russell Islands and Guadalcanal, Ormsby loaded Marines of the First Provisional Brigade, trained then in May, and landed them on Guam 21 July.

Making another Magic Carpet run with veterans in June, Ormsby returned to San Francisco via Tinian and Saipan from Guam on 13 July.

She departed San Francisco on 31 July en route to Manila to lift members of the 43rd Division to Tokyo, arriving there on 13 September.

Ormsby was eventually acquired for commercial service by United States Lines and renamed SS American Producer.

In March 1969, American Producer was severely damaged after striking the pier at San Francisco while outbound for Da Nang, Vietnam, with a cargo of bombs.