Arriving at Pearl Harbor on 10 March, "Sederstrom" was underway again on the 25th with a convoy bound for Majuro. During April, she provided escort services in the Marshalls; and, in May, she returned to Pearl Harbor. On the 29th, she departed again to escort reserves of the Saipan invasion force into the Marianas. The force, Reserve Group 2, arrived off Saipan on 16 June, the day after the invasion, and cruised to the east of the island until after the battle of the Philippine Sea. On the 20th, the Army troops were landed south of Charan Kanoa; and, on the 22nd, "Sederstrom" got underway to escort LST's and LCI's back to Eniwetok.