| Regimental number | 2887 |
| Religion | Roman Catholic |
| Occupation | Labourer |
| Address | Kellyville via Parramatta, New South Wales |
| Marital status | Single |
| Age at embarkation | 18 |
| Next of kin | Mother, Mrs. E. O'Brien, Kellyville via Parramatta, New South Wales |
| Enlistment date | 28 June 1915 |
| Rank on enlistment | Private |
| Unit name | 3rd Battalion, 9th Reinforcement |
| AWM Embarkation Roll number | 23/20/2 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A8 Argyllshire on 30 September 1915 |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 1st Machine Gun Battalion |
| Fate | Returned to Australia 12 April 1919 |
| Miscellaneous details (Nominal Roll) | *Stated to be Henry James O'Brien on NR |
