| Regimental number | 1323 |
| Place of birth | Sydney New South Wales |
| Religion | Church of England |
| Occupation | Storeman |
| Address | Chisholm Road, Auburn, New South Wales |
| Marital status | Single |
| Age at embarkation | 28 |
| Next of kin | Brother, Leslie Octavius Hellyer, Chisholm Road, Auburn, New South Wales |
| Enlistment date | 19 November 1914 |
| Rank on enlistment | Driver |
| Unit name | Infantry Brigade Train 4 |
| AWM Embarkation Roll number | 25/97/1 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A39 Port Macquarie on 21 December 1914 |
| Rank from Nominal Roll | Warrant Officer (Class I) |
| Unit from Nominal Roll | 23rd Depot Unit of Supply |
| Fate | Returned to Australia 3 December 1918 |
| Miscellaneous details (Nominal Roll) | *Given name Oswald Roy |
