| Regimental number | 842 |
| Religion | Roman Catholic |
| Occupation | Clerk |
| Address | 328 Russell Street, Melbourne, Victoria |
| Marital status | Single |
| Age at embarkation | 20 |
| Next of kin | Father, D O'Brien, 328 Russell Street, Melbourne, Victoria |
| Enlistment date | 21 August 1914 |
| Rank on enlistment | Private |
| Unit name | 5th Battalion, G Company |
| AWM Embarkation Roll number | 23/22/1 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board Transport A3 Orvieto on 21 October 1914 |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 5th Battalion |
| Fate | Returned to Australia 21 March 1915 |
