Prison officers at correctional facilities across the state, including Nowra, have walked off the job after a prisoner who bashed four officers received "inadequate punishment" at a court hearing on Wednesday.

Cameron Welsh, a prisoner with a history of violence, was sent to Goulburn Supermax following an alleged attack on four prison officers earlier this year at the Cessnock Correctional Centre, leaving them with "sickening" facial injuries.

All four prison officers were hospitalised after the assault, which occurred in February this year. Two of the officers will never work again.

At his assault sentencing on October 29, Welsh received a three-year community corrections order from the magistrate, sparking fury among union members and prompting a strike.

Prison officers at Cessnock a

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