University of Melbourne.
From 1960 to 1963, Nimmo was a Deputy Secretary in the Prime Minister"s Department. He had previously been First Assistant Secretary of the Banking, Trade and Industry Branch of the Department of the Treasury. Between 1963 and 1973, Nimmo was Secretary of the Department of Housing.
Nimmo was Commissioner of an Inquiry into Transport to and from Tasmania.
He submitted the Report of the Commission of Inquiry into Transport to and from Tasmania in 1976, and it became known as the Nimmo Report. Nimmo died at the Royal Canberra Hospital on 15 December 1984.
In December 1973, Nimmo was appointed a Member of the Commonwealth Grants Commission.