Nathan Green, 52, was seen leaving his address on Monday, April 13.
He was spotted on a trail camera the next morning, before being seen by a member of the public a few hours later.
Police Acting Inspector Adam Ramsay said Green was walking along a track to Rocky River Rd at the time.
"Police Search and Rescue and Land Search and Rescue teams have conducted extensive searches of the area, including reviewing available CCTV, tasking a search dog, and the use of a drone with thermal capability.
"Inquiries have also been conducted with those who saw Nathan on Tuesday 14 April, as well as other residents of the area. Unfortunately, we have not been able to locate him."
Ramsay said police were continuing to work closely with Green's family, who were very concerned for his welfare.
"We ask that the community continues to keep an eye out for Nathan, including checking your backyards and sheds/shelters."
Anyone who spots Green was asked to call 111 immediately.
Other information which could assist police could be provided through 105, either online or by phone.
- Allied Media
