| Regimental number | 7034 |
| Religion | Roman Catholic |
| Occupation | Pastry cook |
| Address | Brisbane, Queensland |
| Marital status | Single |
| Age at embarkation | 24 |
| Next of kin | Mother, Mrs A O'Neil, Grove Street, Albion, Brisbane, Queensland |
| Enlistment date | 27 September 1916 |
| Rank on enlistment | Private |
| Unit name | 9th Battalion, 23rd Reinforcement |
| AWM Embarkation Roll number | 23/26/4 |
| Embarkation details | Unit embarked from Brisbane, Queensland, on board HMAT A55 Kyarra on 17 November 1916 |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 9th Battalion |
| Fate | Returned to Australia 3 January 1919 |
| Family/military connections | Brother: 7033 Pte John James O'NEIL, 9th Bn, returned to Australia, 22 July 1917. |
