In 1967 with the advent of talk radio, Robertson began his broadcasting career working at a number of stations in the southwest of Western Australia.
In 1972 he joined the Australian Broadcasting Corporation (ABC) in Sydney, beginning on the radio station 2BL.
From 1982 to 1988[citation needed] he was host of the Beauty and the Beast television talk show on Network Ten.
[5] Robertson took a unique approach to Newsworld, and his later news show on the Nine Network, Robbo's World Tonight: I thought I'll muck around and then they'll take me off it, you see.
Well, you know, come on, so journalists are a bit thick as you know...Over the years Robertson has also presented radio programs on 6VA, 6TZ, 6IX, 2UE, 2GB, 2SM and ABC Classic FM,[7][5][8] as well as TV station STW-9 and Network Ten.
In his morning programme on ABC Classic FM, he occasionally talked with the show's producer, Ivan Lloyd, the man who selected the music each day.
Although Robertson claimed to be untrained in Classical music, his interest and enthusiasm was obvious and he was especially fond of string quartets.
In his talk between pieces of music, he sometimes referred to his lawn mowing at home, and revealed that his lawn mower was, naturally, named "Lorna", or "Lawner", but he then explained this should not be confused with "Lorna" who managed the ABC's music library and helped with selecting pieces to be played.