| Regimental number | 5620 |
| Religion | Roman Catholic |
| Occupation | Wood machinist |
| Address | 61 Booth Street, Balmain, New South Wales |
| Marital status | Single |
| Age at embarkation | 25 |
| Next of kin | Mother, Mrs Sarah O'Shannassy, 80 Whitehall Street, Footscray, New South Wales |
| Enlistment date | 27 March 1916 |
| Rank on enlistment | Private |
| Unit name | 17th Battalion, 15th Reinforcement |
| AWM Embarkation Roll number | 23/34/3 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A14 Euripides on 9 September 1916 |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 17th Battalion |
| Fate | Returned to Australia 10 December 1918 |
| Miscellaneous details (Nominal Roll) | *Spelt Darby Edmund O'Shannassy on NR |
