Peter John Steeley Martin was last seen in Berry Springs near Darwin, NT in March 1979.
He has a burn mark on his left shoulder from a penny.
He was born in Rockhampton in 1950. He has a son named Nathon, born 1971. His sister Maria has reported him as a missing person to Police.
This photo is of Peter aged 18-19 years when he worked in Gladstone QLD for QAL.
He has been reported missing to Darwin Police.
If you have any information please contact Crimestoppers on 1800 333 000