From the age of nine, Williams played junior soccer for St George Police Boys side in Sydney.
[citation needed] Williams played between 1970 and 1977 in the New South Wales competition for St George Budapest.
In the third and last match of Oz at the tournament vs. Chile, which ended 0–0, he replaced Colin Curran, the first ever Australian scorer of a goal in World Cup finals, in the 83rd minute.
[1] Including qualifiers, Williams played six World Cup matches for Australia during his career.
A 2005 photo of Williams by photographer Sahlan Hayes was purchased by the National Gallery of Australia.