| Regimental number | 446 |
| Religion | Roman Catholic |
| Occupation | Groom |
| Address | Royal Hotel, Nundle, New South Wales |
| Marital status | Single |
| Age at embarkation | 26 |
| Next of kin | Sister, Maggie O'Brien, West Tamworth, New South Wales |
| Enlistment date | 31 March 1916 |
| Rank on enlistment | Private |
| Unit name | 36th Battalion, B Company |
| AWM Embarkation Roll number | 23/53/1 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A72 Beltana on 13 May 1916 |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 3rd Battalion |
| Fate | Returned to Australia 31 May 1919 |
| Miscellaneous details (Nominal Roll) | *Stated to be Arthur O'Brien on NR |
