| Regimental number | 7088 |
| Religion | Roman Catholic |
| Occupation | Traveller |
| Address | Arden Street, Little Coogee, New South Wales |
| Marital status | Single |
| Age at embarkation | 24 |
| Next of kin | Father, Daniel O'Brien, Arden Street, Little Coogee, New South Wales |
| Enlistment date | 18 March 1915 |
| Rank on enlistment | Gunner |
| Unit name | Field Artillery Brigade 5, Brigade HQ |
| AWM Embarkation Roll number | 13/33/1 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A34 Persic on 18 November 1915 |
| Rank from Nominal Roll | Sergeant |
| Unit from Nominal Roll | 5th Field Artillery Brigade |
| Fate | Returned to Australia 8 September 1919 |