Having been an instrumental part of the Terriers' run to promotion last year while on loan from Manchester City, the 26-year-old has also made a great start to life in the Premier League.
The Terriers currently sit third on the the ladder after a 0-0 draw with Southampton kept their unbeaten run intact, with Mooy impressing in all three games in the top flight so far.
Mooy has already received high praise from the likes of Arsenal icon Thierry Henry, now former Manchester United and Everton star Neville, who played over 500 Premier League games, says Mooy's efforts have not gone unnoticed.
"He’s been fantastic. Everything that’s been good about Huddersfield, he’s been involved in," Neville told Premier League Today.
"I think there will be clubs watching him already because I think they'll be thinking, 'Will he want to progress his career beyond Huddersfield?'
"And he'll be someone the bigger clubs will looking at to maybe try and buy in January or in the summer."
Huddersfield coach David Wagner has long known the quality Mooy adds.
He decided it was worth spending a then club-record £10 million fee to secure the on-loan Australian on a permanent contract for their maiden Premier League campaign.
"I think he was a shrewd signing - an important signing in the summer," Neville said.
"He’s someone who has bags of talent and fits into the ethos of Huddersfield and David Wagner."
