Police are appealing for public assistance to help locate missing Kallista man Martin.
The 43-year-old was last seen leaving his residence on Locarno Avenue about 3.00pm on 16 September.
Police and family members are concerned for his welfare as his disappearance is out of character.
An image of Martin has been released in the hope someone may recognise him and be able to provide information on his whereabouts.
Anyone who sees Martin or has information on his whereabouts is urged to contact Lilydale Police Station on 9739 2300.