| Regimental number | 2706 |
| Place of birth | Brighton Victoria |
| Religion | Roman Catholic |
| Occupation | Bookbinder |
| Address | Brighton, Victoria |
| Marital status | Single |
| Age at embarkation | 33 |
| Next of kin | Brother, John Terence O'Brien, 17 Cochrane Street, Brighton, Victoria |
| Enlistment date | 15 August 1916 |
| Rank on enlistment | Private |
| Unit name | 59th Battalion, 6th Reinforcement |
| AWM Embarkation Roll number | 23/76/4 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A71 Nestor on 2 October 1916 |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 59th Battalion |
| Fate | Returned to Australia 5 November 1917 |
| Date of death | 31 January 1956 |
| Place of burial | Cheltenham Memorial Park Cemetery |
