Commissioned at Quebec City on May 27, 1944, she arrived at Halifax on June 19 and in July sailed for Bermuda to work up. On her return in mid-August St. Lambert was assigned to EG C-6, Londonderry, and left St. John's September 18 to join convoy HXF.308 for her passage there. She served on North Atlantic convoys for the rest of her career, leaving St. John's on May 27, 1945, as escort to HX.358, the last HX convoy of the war. In mid-June she sailed for Londonderry on her final trip homeward and was paid off on July 20 and laid up at Sorel for disposal. Sold in 1946 for conversion to a merchant ship, she became the Panamanian Chrysi Hondroulis and, in 1955, the Greek-flag Loula, last noted in Lloyd's Register for 1957-58.