He was born at Windsor,[1] to Lucinda Isabel Rowthorn and (Robert) Bruce Walker, who was also a politician.
He joined the family law firm, William Walker & Son, becoming a senior partner in 1932.
[1] In 1932 he succeeded his father in the New South Wales Legislative Assembly as the United Australia Party member for Hawkesbury.
[1] In August 1939 he was arrested and charged with conspiracy to defraud members of the public in connection with the Scottish Loan and Finance Company of which he was a director.
[10] Walker became an estate agent and was elected an alderman of the Windsor Council in 1945.