During December 1943 and throughout 1944, Tillman escorted convoys between ports in the United States, the Mediterranean, and the United Kingdom. Occasionally, she varied this duty with overhaul at New York or exercises off New England. In the first three months of 1945, Tillman participated in exercises in the Caribbean and off the United States East Coast before departing on 28 March 1945 from the Delaware Bay and steaming via the Panama Canal Zone and San Diego, California, for Hawaii.
