A Ryan Griffiths goal has ensured Newcastle a 1-0 win over an under-performing Brisbane and lifted them back into the top six on the A-League ladder.
The Jets, missing injured marquee star Emile Heskey (hip flexor), climbed to fifth place with the victory at Hunter Stadium while Roar remain in seventh with their championship defence taking a hit.
The young Jets backline featuring debutante Andrew Hoole managed to nullify the potent Roar attack including super striker Besart Berisha to post back-to-back clean sheets.
A mistake from Roar goalkeeper Michael Theo gifted the Jets an early chance when his pass to a defender was almost intercepted by Griffiths.
The Jets had a golden opportunity to go ahead in the 20th minute thanks to more shoddy defending by the Roar with Theo making amends with a great diving save from Craig Goodwin's strike.
Stand-in Jets skipper Ruben Zadkovich, who was declared fit after a knee injury scare at training, fired two long-range shots in the space of a minute just before the break but just shaved the woodwork.
Goodwin then squandered possibly the best chance of the opening half when he found himself in space inside the box but misfired.
The Jets finally broke through in the 47th minute when an unmarked Griffiths got on the end of a cheeky James Brown back-heel pass to slot home for the 1-0 lead.
The Roar had a chance to level minutes later when Mitchell Nichols got past the Jets defence but gloveman Mark Birighitti came off his line to stop the charging striker.
Brown had a chance to score a goal of his own in the 60th minute but pushed his header just wide.
James Donachie could have levelled with 15 minutes to go when he had Birighitti beaten but sent his shot wide.
Birighitti made sure the visitors remained scoreless by denying Berisha a chance to equalise in the dying minutes.