| Regimental number | 5392 |
| Religion | Roman Catholic |
| Occupation | Iron dresser |
| Address | 84 East Street, East Fremantle, Western Australia |
| Marital status | Single |
| Age at embarkation | 34 |
| Next of kin | Sister, Miss Mary O'Neill, 84 East Street, East Fremantle, Western Australia |
| Enlistment date | 28 February 1916 |
| Rank on enlistment | Sapper |
| Unit name | September 1916 Reinforcements |
| AWM Embarkation Roll number | 16/14/1 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A23 Suffolk on 29 September 1916 |
| Rank from Nominal Roll | Sapper |
| Unit from Nominal Roll | 2nd Tunnelling Company |
| Fate | Returned to Australia 3 March 1919 |
| Family/military connections | Brother: 5393 Sapper Thomas O'NEILL, 2nd Tunnelling Company, returned to Australia, 3 March 1919. |
