| Regimental number | 3769 |
| Place of birth | Sydney New South Wales |
| Religion | Church of England |
| Occupation | Shop assistant |
| Address | c/o Harry Giles, Harbourne Street, Kensington, Sydney, New South Wales |
| Marital status | Single |
| Age at embarkation | 25 |
| Next of kin | Father, A Giles, Harbourne Street, Kensingsington, Sydney, New South Wales |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 3rd Battalion, 12th Reinforcement |
| AWM Embarkation Roll number | 23/20/2 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A7 Medic on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 3rd Battalion |
| Fate | Died of wounds |
| Miscellaneous details (Nominal Roll) | *Spelt Sidney Thomas Giles on NR |
| Place of burial | Longuenesse (St. Omer) Souvenir Cemetery (Plot V, Row C, Grave No. 50), France |
| Panel number, Roll of Honour, Australian War Memorial | 36 |
| Other details |
War service: Western Front Medals: British War Medal, Victory Medal |