| Regimental number | 368 |
| Religion | Roman Catholic |
| Occupation | Gasfitter |
| Address | Middle Park, Victoria |
| Marital status | Single |
| Age at embarkation | 23 |
| Next of kin | Father, William O'Brien, 59 McGregor Street, Middle Park, Melbourne, Victoria |
| Enlistment date | 7 February 1916 |
| Rank on enlistment | Private |
| Unit name | 37th Battalion, A Company |
| AWM Embarkation Roll number | 23/54/1 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A34 Persic on 3 June 1916 |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 38th Battalion |
| Fate | Returned to Australia 18 January 1919 |