| Regimental number | 3090 |
| Place of birth | Inverell, New South Wales |
| School | Inverell State School |
| Other training | nil |
| Religion | Roman Catholic |
| Occupation | Labourer |
| Address | Warialda, New South Wales |
| Marital status | Single |
| Age at embarkation | 20 |
| Next of kin | Father, Cornelius O'Brien, The Glen, Warialda, New South Wales |
| Previous military service | nil |
| Enlistment date | |
| Date of enlistment from Nominal Roll | |
| Rank on enlistment | Private |
| Unit name | 34th Battalion, 7th Reinforcement |
| AWM Embarkation Roll number | 23/51/3 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A68 Anchises on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 34th Battalion |
| Fate | Killed in Action |
| Place of death or wounding | France |
| Age at death | 23 |
| Age at death from cemetery records | 23 |
| Place of burial | Unicorn Cemetery (Plot II, Row C, Grave No. 5), Vend'huile, France |
| Panel number, Roll of Honour, Australian War Memorial | 124 |
| Miscellaneous information from cemetery records | Parents: Cornelius and Louis O'BRIEN, The Glen, Warialda, New South Wales |
| 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
