| Regimental number | 2256 |
| Place of birth | Goulburn New South Wales |
| Religion | Church of England |
| Occupation | Clerk |
| Address | Mundy Street, South Goulburn, New South Wales |
| Marital status | Single |
| Age at embarkation | 23 |
| Next of kin | Father, J J Brennock, Mundy Street, South Goulburn, New South Wales |
| Enlistment date | 17 July 1915 |
| Rank on enlistment | Private |
| Unit name | 20th Battalion, 4th Reinforcement |
| AWM Embarkation Roll number | 23/37/2 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A8 Argyllshire on 30 September 1915 |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | Australian Army Ordnance Corps |
| Fate | Returned to Australia 8 May 1919 |