| Regimental number | 1672 |
| Date of birth | |
| Place of birth | Mailor's Flat, Victoria |
| Religion | Roman Catholic |
| Occupation | Printer |
| Address | Polwarth Street, Colac, Victoria |
| Marital status | Single |
| Age at embarkation | 20 |
| Next of kin | Mother, Mrs O'Brien, Polwarth Street, Colac, Victoria |
| Previous military service | 71st Infantry |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 14th Battalion, 3rd Reinforcement |
| AWM Embarkation Roll number | 23/31/2 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A54 Runic on |
| Regimental number from Nominal Roll | 1674 |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 4th Field Ambulance |
| Fate | Killed in Action |
| Place of burial | Westhof Farm Cemetery (Plot II, Row E, Grave No. II), Neuve-Eglise, Belgium |
| Panel number, Roll of Honour, Australian War Memorial | 183 |
| Miscellaneous information from cemetery records | Commemorated in Colac Cemetery, Victoria. PhotO: Ian Marr |
| Family/military connections | Brother: 344 Pte William Patrick O'BRIEN, 24th Bn, killed in action, 16 September 1915; 2nd Lt James O'BRIEN, killed in action, 22 March 1918. |
| Other details |
War service: Egypt, Gallipoli, Western Front Medals: 1914-15 Star, British War Medal, Victory Medal |
Postal Address:
Po Box 7916
Canberra BC 2610, Australia
Street Address:
Northcott Drive,
Campbell, ACT 2600
