| Regimental number | 2789 |
| Place of birth | Wagga Wagga New South Wales |
| Religion | Roman Catholic |
| Occupation | Telephonist |
| Address | Mulwarree Street, Goulburn, New South Wales |
| Marital status | Single |
| Age at embarkation | 21 |
| Next of kin | Father, R M Sykes, Mulwarree Street, Goulburn, New South Wales |
| Enlistment date | 9 June 1915 |
| Date of enlistment from Nominal Roll | 9 June 1915 |
| Rank on enlistment | Private |
| Unit name | 18th Battalion, 6th Reinforcement |
| AWM Embarkation Roll number | 23/35/2 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A14 Euripides on 2 November 1915 |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 1st DS Company |
| Fate | Effective abroad (still overseas) |
| Miscellaneous details (Nominal Roll) | *Given name Oliver John |
| Date of death | 10 April 1963 |
| Place of burial | Macquarie Park Cemetery |
