| Regimental number | 39080 |
| Religion | Roman Catholic |
| Occupation | Farmer |
| Address | Kapunda, South Australia |
| Marital status | Single |
| Age at embarkation | 24 |
| Next of kin | Father, James John O'Sullivan, Hall Street, Semaphore, South Australia |
| Enlistment date | |
| Rank on enlistment | Gunner |
| Unit name | Field Artillery Brigade, Reinforcement 33 |
| AWM Embarkation Roll number | 13/128/2 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board SS Indarra on |
| Rank from Nominal Roll | Gunner |
| Unit from Nominal Roll | 12th Field Artillery Brigade |
| Fate | Returned to Australia |
| Miscellaneous information from cemetery records | Plaque in South Australian Garden of Remembrance |
| Family/military connections | Brother: 39079 Bombardier David Joseph O'SULLIVAN, 12th Field Artillery Brigade, returned to Australia, 25 March 1919. |
| Date of death |