| Regimental number | 2005 |
| Place of birth | Glebe, New South Wales |
| School | Patrician Brothers (Catholic) School, Redfern, New South Wales |
| Other training | Chairmaker |
| Religion | Roman Catholic |
| Occupation | Carter |
| Address | Fotheringham, Arden Street, Waverley, Sydney, New South Wales |
| Marital status | Single |
| Age at embarkation | 23 |
| Next of kin | Mother, Mrs O'Brien, Fotheringham, Waverley, Sydney, New South Wales |
| Previous military service | Nil |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 4th Battalion, 5th Reinforcement |
| AWM Embarkation Roll number | 23/21/2 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A55 Kyarra on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 4th Battalion |
| Other details from Roll of Honour Circular | Was wounded at Gallipoli in July 1915. Place of death either Peronne or Proyart, France. |
| Fate | Killed in Action |
| Place of death or wounding | Peronne, France |
| Age at death | 26.4 |
| Age at death from cemetery records | 26 |
| Place of burial | Heath Cemetery (Plot VII, Row B, Grave No. 4), Harbonnieres, France |
| Panel number, Roll of Honour, Australian War Memorial | 41 |
| Miscellaneous information from cemetery records | Parents: Daniel and Annie O'BRIEN, "Claremont", Stoney Creek Road, Bexley, New South Wales |
| Family/military connections | Three brothers not specified. |
Postal Address:
Po Box 7916
Canberra BC 2610, Australia
Street Address:
Northcott Drive,
Campbell, ACT 2600
