Moniz, who was unable to keep the Magpies in Sky Bet League 1 last season after taking over from Shaun Derry in April, still wants to add to his defensive and attacking options.
Speaking after his side’s 3-0 pre-season friendly defeat at Grimsby on Saturday, the Dutchman said: “We need people who can score the goals and avoid the goals.
“It’s very simple; it’s at the front and at the back. In the middle everybody is okay, but the exception is defence and attack.
“A centre-back has always been my wish, but we haven’t been able to find the right one as yet.
“But I would like at least three in. We know that. It’s not a surprise.”