Jack joined the unit on Timor from 2/1 Heavy Battery, Royal Australian Artillery, as a Bombardier after the fall of Koepang, approx March 1942. After the campaign on Timor, he embarked with the unit, for Australia aboard the Royal Dutch destroyer “Tjerk Hiddes” on either 11 Dec 1942 or 16 Dec 1942, as the embarkation rolls do not differentiate.
He transferred to Coastal Artillery, Fremantle, W.A., 22 Mar 1943 then to 2nd Australian Field Artillery Training, 13 Apr 1945. On 17 Aug 1945 he transferred to 1st Australian Commando Training Squadron.
According to the World War Two Nominal Roll he was discharged on 22 Jun 1971, with Service No 5110.