Australia's most wanted terrorist Neil Prakash could radicalise large numbers of inmates if extradited to Australia, according to a terror expert.

The Melbourne-born ISIS fanatic has been held behind bars in a maximum-security prison since he was captured crossing the Turkish border in October.

A treaty is currently underway to extradite the 26-year-old jihadist back to home soil, and Malcolm Turnbull last week called on him to 'face the music.'

But ANU prison radicalisation expert Dr Clarke Jones told Daily Mail Australia the battle-hardened IS recruiter still poses a serious threat behind bars.

Australia's most wanted terrorist Neil Prakash could radicalise large numbers of inmates if extradited to Australia, according to an expert

Mugshots of Prakash after his arrest in Turkey following a tip-off from Australian security agencies

'He is an automatic threat to the prison system. He's got solid experience in Iraq and Syria. How could they stop him spreading that message?,' said Dr Jones.

'It could be a big risk bringing him back. It would be extremely problematic to keep an eye on him, not to mention change him.'

But as a high-ranking member the group, Prakash holds valuable information for security agencies on the movements of local terror networks.

For his own safety Prakash would likely be held in Australia's first terrorist prison, a $47 million 'mini-max' jail within Goulburn's Supermax.

'If he wasn't segregated, he would be at high risk of being knocked off by other inmates trying to win notoriety from his profile.'

Last week, the jihadist denied committing any crimes and pleaded not to be sent back to Australia in a court appearance in Turkey.

'I did not commit any crimes, I did not kill anyone.'

Prakash would likely be held in Australia's first terrorist prison, a $47 million 'mini-max' jail within Goulburn's Supermax (pictured)

Prakash featured in slick propaganda films to promote ISIS' ideology to young Australians (pictured: a video where he call son Australians to take up arms in the Middle East)

'I do not want to be extradited to Australia. I want to be extradited to a Muslim country. I want to be released.'

But Malcolm Turnbull made clear in a 2GB Radio interview last week he had other plans for the failed rapper.

'We want him to come back here... and then have a very, very long term of imprisonment for his crimes. I mean, he is one of the worst examples of terrorist financing and organisation.'

Prakash is a wanted man in the US, the UK, Israel, Turkey and Australia over his role with the bloodthirsty group.

Malcolm Turnbull calling for him last week to 'face the music' and return for a lengthy prison sentencein Australia

As a high-ranking member the group, Prakash could could offer valuable information to security agencies with the movements on local terror networks

Prakash has been linked to a number of conspiracies to slaughter Australians, including a foiled Anzac Day plot to behead a police officer in April 2015.

The fanatic worked tirelessly with an English-speaking cell to radicalise Western people then lure them to the Middle East to fight for the group.

Prakash featured in slick propaganda films to promote ISIS' ideology to young Australians, many of whom died in the war-torn region.