| Regimental number | 12305 |
| Place of birth | Wagga Wagga, New South Wales |
| Religion | Roman Catholic |
| Occupation | Commercial traveller |
| Address | Sydney, New South Wales |
| Marital status | Single |
| Age at embarkation | 24 |
| Height | 5' 8.25" |
| Weight | 166 lbs |
| Next of kin | Father, Mr Eugene O'Sullivan, Thorne Street, Wagga Wagga, New South Wales |
| Previous military service | Nil |
| Enlistment date | |
| Place of enlistment | Sydney, New South Wales |
| Rank on enlistment | Driver |
| Unit name | Army Service Corps July 1916 Reinforcements |
| AWM Embarkation Roll number | 25/108/1 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board RMS Orontes on |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A42 Boorara on |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A15 Port Sydney on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 4th Division Train |
| Fate | Returned to Australia |
| Other details |
War service: Western Front Medals: British War Medal, Victory Medal |
| Sources | NAA: B2455, O'SULLIVAN Eugene Mark |