| Regimental number | 1674 |
| Religion | Roman Catholic |
| Occupation | Clerk |
| Address | Pomona, Gibbs Street, Rockdale, New South Wales |
| Marital status | Single |
| Age at embarkation | 22 |
| Next of kin | Father, Thomas Joseph O'Brien, address unknown; Miss Lily West, Pomona, Gibbs Street, Rockdale, New South Wales |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 7th Light Horse Regiment, 12th Reinforcement |
| AWM Embarkation Roll number | 10/12/3 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A34 Persic on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 2nd Light Horse Brigade Headquarters |
| Fate | Returned to Australia |
Postal Address:
Po Box 7916
Canberra BC 2610, Australia
Street Address:
Northcott Drive,
Campbell, ACT 2600
