| Regimental number | 2716 |
| Place of birth | Cappamere Ireland |
| Religion | Roman Catholic |
| Occupation | Miner |
| Address | Police Station, Kelvin Grove, Brisbane, Queensland |
| Marital status | Single |
| Age at embarkation | 27 |
| Next of kin | Brother, Matthew O'Brien, Police Station, Kelvin Grove, Brisbane, Queensland |
| Enlistment date | 27 August 1915 |
| Rank on enlistment | Private |
| Unit name | 26th Battalion, 6th Reinforcement |
| AWM Embarkation Roll number | 23/43/2 |
| Embarkation details | Unit embarked from Brisbane, Queensland, on board HMAT A48 Seang Bee on 21 October 1915 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A38 Ulysses on 27 October 1915 |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 12th Battalion |
| Fate | Returned to Australia 16 October 1916 |