| Regimental number | 3386 |
| Place of birth | Blayney New South Wales |
| Religion | Roman Catholic |
| Occupation | Assistant station master, Victorian Railways |
| Address | Flemmington, Victoria |
| Marital status | Single |
| Age at embarkation | 26 |
| Next of kin | Father, J O'Brien, 60 Dover Street, Flemington, Victoria |
| Enlistment date | 13 July 1915 |
| Rank on enlistment | Private |
| Unit name | 5th Battalion, 11th Reinforcement |
| AWM Embarkation Roll number | 23/22/2 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A71 Nestor on 11 October 1915 |
| Regimental number from Nominal Roll | 3369 |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 5th Battalion |
| Fate | Returned to Australia 25 January 1919 |