| Regimental number | 22982 |
| Religion | Roman Catholic |
| Occupation | Clerk |
| Address | 84 Bridge Street, Port Melbourne, Victoria |
| Marital status | Single |
| Age at embarkation | 23 |
| Next of kin | Father, W T O'Brien, 84 Bridge Street, Port Melbourne, Victoria |
| Enlistment date | 6 March 1916 |
| Rank on enlistment | Gunner |
| Unit name | Field Artillery Brigade 8, Reinforcement 1 |
| AWM Embarkation Roll number | 13/36/2 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A7 Medic on 20 May 1916 |
| Rank from Nominal Roll | Gunner |
| Unit from Nominal Roll | 8th Field Artillery Brigade |
| Fate | Returned to Australia 11 May 1919 |
