| Regimental number | 3847 |
| Place of birth | Port Pirie, South Australia |
| School | Port Pirie Public School, South Australia |
| Other training | Bandsman |
| Religion | Roman Catholic |
| Occupation | Baker |
| Address | Third Street, Port Pirie West, South Australia |
| Marital status | Single |
| Age at embarkation | 18 |
| Next of kin | Brother, T J O'Brien, Third Street, Port Pirie West, South Australia |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 10th Battalion, 12th Reinforcement |
| AWM Embarkation Roll number | 23/27/3 |
| Embarkation details | Unit embarked from Adelaide, South Australia, on board RMS Malwa on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 10th Battalion |
| Fate | Died of wounds |
| Place of death or wounding | Not known |
| Age at death | 20 |
| Age at death from cemetery records | 20 |
| Place of burial | Doingt Communal Cemetery Extension (Plot I, Row E, Grave No. 30), France |
| Panel number, Roll of Honour, Australian War Memorial | 60 |
| Miscellaneous information from cemetery records | Parents: Patrick Joseph and Julia O'BRIEN. Native of Port Pirie, South Australia |
| Other details |
War service: Western Front Medals: British War Medal, Victory Medal |
Postal Address:
Po Box 7916
Canberra BC 2610, Australia
Street Address:
Northcott Drive,
Campbell, ACT 2600
