| Regimental number | 1981 |
| Religion | Roman Catholic |
| Occupation | Mechanic |
| Address | Thompson Road, North Fremantle, Western Australia |
| Marital status | Single |
| Age at embarkation | 18 |
| Next of kin | Father, James Henry O'Neill, Thompson Road, North Fremantle, Western Australia |
| Enlistment date | 21 June 1915 |
| Rank on enlistment | Private |
| Unit name | 28th Battalion, 3rd Reinforcement |
| AWM Embarkation Roll number | 23/45/2 |
| Embarkation details | Unit embarked from Fremantle, Western Australia, on board HMAT A68 Anchises on 2 September 1915 |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 2nd Machine Gun Battalion |
| Fate | Returned to Australia 2 January 1919 |
