Hi Nesta
They all seem to be deceased
Oh these blokes and their ages

However it appears he was in the Volunteer Defence Corps, but 11 years

However his summary below indicates he enlisted in 1942 not 1939.
http://www.ww2roll.gov.au/LING, Ivor Thomas
Australian Army Service#V373736
Date of Birth 4 May 1893 Suffolk England
Date of Enlistment and locality 5 Feb 1942 Walbrundrie, NSW
Place of Enlistment Royal Park, Victoria
NOK LING, Alice
Date of Discharge - 1 Jun 1944 with Rank Sergeant
Posting at Discharge - Volunteer Defence Corps
I hope the newspaper snippets are helpful.
Cheers and good luck
Cando