Police are appealing for public assistance to help locate missing man Nicholas.
The 50-year-old was last seen on Tyson Way in Sydenham on May 13.
Nicholas is described as being 180cm tall and of solid build with long grey hair.
He might be travelling in a red Mazda, registration 1FD1HX.
Police and family have concerns for his welfare due to his disappearance being out of character, and due to the length of time he has not been seen.
Anyone with information is urged to contact Keilor Downs Police Station on 9365 3333.