World War II Pacific Theatre operations

Following shakedown off Bermuda, she departed Boston, Massachusetts, 29 November and arrived at Manus, Admiralty Islands, 7 January 1945. From 24 January to 2 March, Rombach escorted convoys between Hollandia, New Guinea, and Leyte Gulf, Philippine Islands. Then she served in the Manila Bay area, Luzon, Philippine Islands. Beginning 26 April, Rombach spent a month with the Local Naval Defense Force, Lingayen Gulf, Luzon, Philippine Islands.

She resumed operations with her escort division from 27 May to 8 August, operating in a hunter-killer group off the western coast of Luzon. Rombach next served as part of a carrier hunter-killer group patrolling the Leyte-Okinawa convoy routes north of Luzon until after the cessation of hostilities, 14 August 1945.

End-of-war activity

Employed in air-sea rescue operations during the latter part of August, Rombach was engaged in occupational landings on 5 September at Jinsen, Korea; on 1 October at Taku, China, and on 5 October at Qingdao. She then served with the "Magic Carpet" fleet from 8 October to 22 November escorting transports to East China ports where servicemen were embarked for return to the United States.

Post-war Naval Reserve training assignment

In July 1946 Rombach was assigned to the Pacific Reserve Fleet at Seattle, Washington, for the training of Naval Reserves. In addition to regular training duties for Reservists of the 13th Naval District, Rombach participated in PhibPac exercises in 1952 and 1953 and spent eight weeks each year from 1952 to 1957 as a school ship at the Fleet Sonar School, San Diego, California.

Final decommissioning

On 9 January 1958 she decommissioned at Bremerton, Washington, where she remained until 1 March 1972. At that time she was stricken from the Navy list after an INSURV inspection team determined her unfit for further service. On 19 December 1972 she was sold for scrapping.