| Regimental number | 4867 |
| Religion | Roman Catholic |
| Occupation | Manager bakery |
| Address | King William Street, Bayswater, Western Australia |
| Marital status | Single |
| Age at embarkation | 25 |
| Next of kin | Father, Mr W O'Brien, Bakers Hill, Western Australia |
| Enlistment date | 15 December 1915 |
| Rank on enlistment | Private |
| Unit name | 11th Battalion, 15th Reinforcement |
| AWM Embarkation Roll number | 23/28/4 |
| Embarkation details | Unit embarked from Fremantle, Western Australia, on board HMAT A38 Ulysses on 1 April 1916 |
| Rank from Nominal Roll | Sergeant |
| Unit from Nominal Roll | 11th Battalion |
| Fate | Returned to Australia 1 June 1919 |
