| Regimental number | 2858 |
| Religion | Roman Catholic |
| Occupation | Billiard marker |
| Address | Hobart, Tasmania |
| Marital status | Single |
| Age at embarkation | 33 |
| Next of kin | Father, David O'Brien, 47 Molle Street, Hobart, Tasmania |
| Enlistment date | 18 October 1916 |
| Date of enlistment from Nominal Roll | 9 October 1916 |
| Rank on enlistment | Private |
| Unit name | 40th Battalion, 6th Reinforcement |
| AWM Embarkation Roll number | 23/57/2 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A67 Orsova on 6 September 1915 |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 40th Battalion |
| Fate | Returned to Australia --/07/1919 |
