Otto John Siefken served with the 3rd Australian Machine Gun Battalion of the Australian Imperial Force in WWI. His service number was 354 and he held the rank of Private.
He died in Germany on 21 October 1918 aged 23 and is buried in Berlin South-Western Cemetery, Berlin, Germany.
His name is located at panel ? in the Commemorative Area at the Australian War Memorial in Canberra.
‘Maylands, Perth, Western Australia, Australia’ was recorded as his ‘place of association’.
For more information
Search the Australian War Memorial website https://www.awm.gov.au/