| Regimental number | 20856 |
| Place of birth | Sydney New South Wales |
| Religion | Roman Catholic |
| Occupation | Blacksmith |
| Address | 125 Wilson Street, Redfern, Sydney, New South Wales |
| Marital status | Single |
| Age at embarkation | 19 |
| Next of kin | Father, C P O'Neill, 125 Wilson Street, Redfern, Sydney, New South Wales |
| Enlistment date | 6 September 1915 |
| Rank on enlistment | Gunner |
| Unit name | 9th Field Artillery Brigade, 33rd Battery |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A8 Argyllshire on 11 May 1916 |
| Rank from Nominal Roll | Gunner |
| Unit from Nominal Roll | 8th Field Artillery Brigade |
| Fate | Returned to Australia 9 December 1918 |
