Police are searching for a man who escaped from a correctional centre in Muswellbrook yesterday afternoon.

Myles Fergus Wilson, 58, was last seen at St Heliers Correctional Centre in Muswellbrook, about 2pm yesterday (Friday 24 July 2015).

Following a search of the grounds and surrounding area, Mr Wilson could not be found. He was reported as an escapee to Hunter Valley Local Area Command and an investigation commenced.

Myles Wilson is described as being of Caucasian appearance, about 165 to 170cm tall, with a slim build, and light coloured hair.

He was last seen wearing green tracksuit pants and a high-visibility green shirt.

Police are urging anyone with information about the whereabouts of Mr Wilson to come forward.

Police are warning the public not to approach Myles Wilson if they see him, but to instead contact Triple Zero immediately.