Samuel Noel John O’Hara

I need some help to find my father,last seen in australia around 1969/1970. Could have gone back to Belfast to his family.He was born around 1930.May have 2 brothers also in belfast.He came to Australia,queensland back in the late 50's early 60's. I also think his mum,dad and brothers lived in belfast for a very long time.My mother's name was Valerie
Ann bruce-hamilton. He was a truck driver.