The ship was laid down as the unnamed U.S. Navy destroyer escort DE-522 by the Boston Navy Yard in Boston, Massachusetts, on 14 August 1943 and launched on 24 September 1943. The United States transferred her to the United Kingdom under Lend-Lease on 10 December 1943.
The ship was commissioned into service in the Royal Navy as HMS Moorsom (K567) [1] on 10 December 1943 simultaneously with her transfer. She served on convoy escort duty in the North Atlantic Ocean and the North Sea for the remainder of World War II. In addition, she supported the Allied invasion of Normandy in the summer of 1944.
After the conclusion of the war, Moorsom steamed to New York City, arriving there on 16 October 1945. The Royal Navy decommissioned her there on 25 October 1945 and returned her to the U.S. Navy the same day.
After her return, Moorsom remained in the 3rd Naval District. The U.S. Navy struck her from its Naval Vessel Register on 5 December 1945 and soon sold her for scrapping, which was completed on 12 July 1946.