Following her shakedown training off Bermuda, "Jobb" was assigned to a hunter-killer patrol group in the Atlantic. A hurricane forced her back to Norfolk, Virginia from 13–15 September, after which she steamed to New York to prepare for Pacific service. "Jobb" sailed on 23 October, and proceeded via the Panama Canal and Bora Bora to Humboldt Bay, New Guinea, where she arrived on 21 November. With the invasion of the Philippines then underway, "Jobb" escorted a convoy to Leyte Gulf on 28 November. She remained at Leyte until 12 December, when she screened a slow tow convoy for Mindoro. The next day, Japanese snooper aircraft appeared, followed by bombers. In the raids of the next few days, "Jobb's" gunners shot down at least two of the attackers. After seeing the tows safely to Mindoro, she next sailed via Leyte to New Guinea, where she arrived at Hollandia on 28 December.