| Regimental number | 4560 |
| Religion | Church of England |
| Occupation | Clerk |
| Address | Murchison Road, Rushworth, Victoria |
| Marital status | Single |
| Age at embarkation | 22 |
| Next of kin | Mother, Mrs M O'Sullivan, Murchison Road, Rushworth, Victoria |
| Enlistment date | 3 August 1915 |
| Rank on enlistment | Private |
| Unit name | 7th Battalion, 14th Reinforcement |
| AWM Embarkation Roll number | 23/24/4 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A32 Themistocles on 28 January 1916 |
| Rank from Nominal Roll | Sergeant |
| Unit from Nominal Roll | 7th Battalion |
| Fate | Returned to Australia 18 July 1919 |
| Family/military connections | Brother: 39686 Corporal Stuart Poyner O'SULLIVAN, 2nd Field Artillery Brigade, effective abroad (still overseas). |