| Regimental number | 5853 |
| Religion | Roman Catholic |
| Occupation | Shoemaker |
| Address | 5 Forbes Street, Darlington, New South Wales |
| Marital status | Single |
| Age at embarkation | 27 |
| Next of kin | Brother, Mathew O'Brien, 5 Forbes Street, Darlington, New South Wales |
| Enlistment date | |
| Date of enlistment from Nominal Roll | |
| Rank on enlistment | Private |
| Unit name | 18th Battalion, 16th Reinforcement |
| AWM Embarkation Roll number | 23/35/3 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A40 Ceramic on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 18th Battalion |
| Fate | Returned to Australia |
| Date of death | |
| Place of burial | Botany Cemetery |
Postal Address:
Po Box 7916
Canberra BC 2610, Australia
Street Address:
Northcott Drive,
Campbell, ACT 2600
