Police are currently searching for Daniel Briffa who escaped custody at a Correctional Centre in Trawalla overnight.
The 50-year-old was serving a term of imprisonment for drug, theft and traffic related offences.
He has escaped the centre by unknown means sometime between 7.30pm and 9.30pm on 4 September.
Briffa is approximately 170cm tall, of solid build, short brown curly hair, a full beard and moustache. He also has tattoos on his lower legs.
He was last seen wearing a forest green tracksuit but may have been able to obtain different clothes since his escape.
Briffa is previously known to have frequented the Werribee, Hoppers Crossing and Tarneit areas.
Police have released an image of Briffa in the hope someone recognises him and can provide information on his current whereabouts.
He is not believed be violent however members of the public are advised not to approach Briffa if he is sighted, but to contact triple-zero (000) immediately.
Those with other information that may be able to assist police find Briffa should contact the Ballarat Police Station on 5336 6000 or Crime Stoppers on 1800 333 000.