| Regimental number | 842 |
| Place of birth | Yackandandah, Victoria |
| Religion | Roman Catholic |
| Occupation | Railway employee |
| Address | 10 Normanby Street, South Melbourne, Victoria |
| Marital status | Single |
| Age at embarkation | 19 |
| Next of kin | Father, Mr O'Sullivan, 10 Normanby Street, South Melbourne, Victoria |
| Enlistment date | |
| Place of enlistment | Melbourne, Victoria |
| Rank on enlistment | Driver |
| Unit name | 3rd Light Horse Field Ambulance |
| AWM Embarkation Roll number | 26/41/1 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A51 Chilka on |
| Rank from Nominal Roll | Driver |
| Unit from Nominal Roll | Australian Army Medical Corps Details |
| Fate | Returned to Australia |
| Discharge date | |
| Other details |
Commenced return to Australia on board HT 'Nestor', 1 November 1919; disembarked Melbourne, 15 December 1919; discharged (termination of period of enlistment), Melbourne, 23 January 1920. Medals: British War Medal, Victory Medal |
| Sources | NAA: B2455, O'SULLIVAN Cornelius |