| Regimental number | 1641 |
| Religion | Roman Catholic |
| Occupation | Plumber |
| Address | Victoria Street, Horse Shoe Bend, West Maitland, New South Wales |
| Marital status | Single |
| Age at embarkation | 21 |
| Next of kin | Father, Dennis O'Brien, Horse Shoe Bend, West Maitland, New South Wales |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 34th Battalion, C Company |
| AWM Embarkation Roll number | 23/51/1 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A20 Hororata on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 4th Battalion |
| Fate | Returned to Australia |
| Date of death | |
| Place of burial | West Maitland Cemetery |
Postal Address:
Po Box 7916
Canberra BC 2610, Australia
Street Address:
Northcott Drive,
Campbell, ACT 2600
