| Regimental number | 223 |
| Religion | Roman Catholic |
| Occupation | Clerk |
| Address | 227 Drummond Street, Carlton |
| Marital status | Married |
| Age at embarkation | 32 |
| Next of kin | Wife, Mrs Annie Tresa O'Neill, 227 Drummond Street, Carlton |
| Date of enlistment from Nominal Roll | |
| Rank on enlistment | Private |
| Unit name | 22nd Battalion, A Company |
| AWM Embarkation Roll number | 23/39/1 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A38 Ulysses on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 22nd Battalion |
| Recommendations (Medals and Awards) |
Distinguished Conduct Medal 'For skill and courage in organising successful counter attack. Also valuable services as messanger under heavy fire.' Recommendation date: |
| Fate | Returned to Australia |
| Miscellaneous details (Nominal Roll) | *Spelt George James O'Neill on NR |
| Medals |
Distinguished Conduct Medal 'For conspicuous gallantry during operations. When his officers and non-commissioned officers had become casualties, he counter attacked an enemy bombing party, and annihilated it. The rest of the day he acted as messenger under heavy fire.'
Source: 'Commonwealth Gazette' No. 184 Date: |
| Date of death | |
| Place of burial | Coburg Cemetery |