| Religion | Roman Catholic |
| Occupation | Law clerk |
| Address | National Bank, South Melbourne, Victoria |
| Marital status | Single |
| Age at embarkation | 21 |
| Next of kin | Father, Michael John O'Bryan, 254 Coventry Street, South Melbourne, Victoria |
| Enlistment date | 9 June 1916 |
| Rank on enlistment | 2nd Lieutenant |
| Unit name | Field Artillery Brigade, Reinforcement 30 |
| AWM Embarkation Roll number | 13/128/2 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A15 Port Sydney on 9 November 1917 |
| Rank from Nominal Roll | Lieutenant |
| Unit from Nominal Roll | 3rd Field Artillery Brigade |
| Fate | Effective abroad (still overseas) |
