Notts County appoint Dutch boss to replace sacked Shaun Derry
Chairman Ray Trew said Moniz's arrival would bring a new level of excitement.
"Ricardo has a fantastic reputation, not only for the style of football he plays, but also his ability to spot and nurture young talent," said Trew.
"In Ricardo we have found that because, having spoken to him at length, his footballing philosophy is one of structured attacking play, which I hope is something that our fans will buy in to.
"I know that when I come to Meadow Lane I want to be entertained, I want to be excited by what I see out there on the pitch."
Notts are one point from safety with six games left, having slipped to 22nd place after three consecutive draws under Paul Hart, who stepped up from his role as acting academy manager to become interim boss on a temporary basis.
Moniz held numerous coaching positions before joining Tottenham, where he worked under Martin Jol from 2005 to 2008.
He followed Jol to Hamburg in 2008 before going on to become the first manager to win the Double in Austria with Red Bull Salzburg in 2011-12.
Moniz has also managed Ferencvaros and Lechia Gdansk, and was sacked from his last managerial job at Bundesliga 2 side 1860 Munich in September.
Dave Kevan, who returned to the club last week, will work as assistant manager to Moniz, alongside goalkeeping coach Kevin Pilkington and strength and conditioning coach Mike Edwards.