| Regimental number | 2221 |
| Place of birth | Sydney New South Wales |
| Religion | Roman Catholic |
| Occupation | Labourer |
| Address | Lismore PO, Lismore, New South Wales |
| Marital status | Single |
| Age at embarkation | 36 |
| Next of kin | Father, Frederick Charles O'Brien, Molesworth Street, Lismore, New South Wales |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 5th Light Horse Regiment, 15th Reinforcement |
| AWM Embarkation Roll number | 10/10/4 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A67 Orsova on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 2nd Light Horse Regiment |
| Fate | Returned to Australia |
Postal Address:
Po Box 7916
Canberra BC 2610, Australia
Street Address:
Northcott Drive,
Campbell, ACT 2600
