| Regimental number | 44 |
| Place of birth | Price N/A |
| Religion | Roman Catholic |
| Occupation | Porter |
| Address | Frances, South Australia |
| Marital status | Single |
| Age at embarkation | 23 |
| Next of kin | Father, Thomas James O'Brien, Frances, South Australia |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 3rd Light Horse Regiment, Machine Gun Section |
| AWM Embarkation Roll number | 10/8/1 |
| Embarkation details | Unit embarked from Adelaide, South Australia, on board TRANSPORT A17 Port Lincoln on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 1st Light Horse Brigade Machine Gun Squadron |
| Fate | Returned to Australia |
Postal Address:
Po Box 7916
Canberra BC 2610, Australia
Street Address:
Northcott Drive,
Campbell, ACT 2600
