Regimental number3347
ReligionRoman Catholic
Address93 Moray Street, South Melbourne, Victoria
Marital statusWidower
Age at embarkation44
Next of kinSon, Walter Francis O'Brien, c/o John Connell, Bourke Street, Melbourne, Victoria
Enlistment date27 May 1917
Date of enlistment from Nominal Roll22 May 1917
Rank on enlistmentPrivate
Unit name3rd Pioneer Battalion, Reinforcement 7
AWM Embarkation Roll number14/15/3
Embarkation detailsUnit embarked from Melbourne, Victoria, on board HMAT A32 Themistocles on 4 August 1917
Rank from Nominal RollPrivate
Unit from Nominal Roll3rd Pioneer Battalion
FateReturned to Australia 12 May 1918