| Regimental number | 3011 |
| Place of birth | Sydney New South Wales |
| Religion | Roman Catholic |
| Occupation | Electrical engineer |
| Address | Paddington, New South Wales |
| Marital status | Single |
| Age at embarkation | 18 |
| Next of kin | Father, Michael Thomas O'Brien, 36 Windsor Street, Paddington, New South Wales |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 45th Battalion, 7th Reinforcement |
| AWM Embarkation Roll number | 23/62/3 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board SS Port Nicholson on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 45th Battalion |
| Fate | Returned to Australia |
Postal Address:
Po Box 7916
Canberra BC 2610, Australia
Street Address:
Northcott Drive,
Campbell, ACT 2600
