| Regimental number | 8/136 |
| Address | Mosgiel |
| Marital status | Single |
| Next of kin | Mother, Mrs Norah O'Brien, Janefield, Mosgiel |
| Rank on embarkation | Private |
| Enlistment status | Volunteer |
| Unit name | New Zealand Expeditionary Force, Main Body, Otago Infantry Battalion |
| Embarkation details | Unit embarked from Wellington on |
| Members of the Otago Infantry Battalion, Main Body, left Wellington on 16 October 1914 on two ships, HMNZT 9 'Hawke's Bay' and HMNZT 5 'Ruapehu'. From the Nominal Roll it is not possible to determine on which ship an individual embarked. | |
| Final rank | Private |
| Final unit | Otago Infantry Regiment |
| Fate | Killed in Action |
| Age at death from cemetery records | 25 |
| Place of burial | No known grave |
| Commemoration details | Chunuk Bair (New Zealand) Memorial (Panel No 16), Gallipoli, Turkey |
| Miscellaneous information from cemetery records | Parents: Norah O'Brien, 359 Cargill Road, Dunedin South, and the late John O'Brien |
| Family/military connections | Brother: 39300 Pte John O'BRIEN, 2nd Bn, Otago Infantry Regiment, killed in action, 12 October 1917. |
| Other details |
War service: Egypt, Gallipoli Medals: 1914-15 Star, British War Medal, Victory Medal |
| Miscellaneous details | Nominal Roll Vol. 1: Otago Infantry Batln/Main Body |