| Regimental number | 85 |
| Place of birth | Wellington, New South Wales |
| Religion | Roman Catholic |
| Occupation | Farmer |
| Address | Suntop via Wellington, New South Wales |
| Marital status | Single |
| Age at embarkation | 21 |
| Next of kin | Mother, Mrs Eden O'Brien, Suntop via Wellington, New South Wales |
| Enlistment date | |
| Date of enlistment from Nominal Roll | |
| Rank on enlistment | Private |
| Unit name | Machine Gun Company 9 |
| AWM Embarkation Roll number | 24/14/1 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A24 Benalla on |
| Regimental number from Nominal Roll | 85A |
| Rank from Nominal Roll | Sergeant |
| Unit from Nominal Roll | 3rd Machine Gun Battalion |
| Fate | Killed in Action |
| Age at death from cemetery records | 23 |
| Place of burial | Templeux-le-Guerard British Cemetery (Plot II, Row C, Grave No. 22), France |
| Panel number, Roll of Honour, Australian War Memorial | 176 |
| Miscellaneous information from cemetery records | Parents: William and Ellen O'BRIEN |