| Regimental number | 4784 |
| Place of birth | Maitland New South Wales |
| Religion | Roman Catholic |
| Occupation | Shearer |
| Address | Wagin, Western Australia |
| Marital status | Single |
| Age at embarkation | 30 |
| Next of kin | Father, R Cusack, 185 Holland Street, Fremantle, Western Australia |
| Enlistment date | 16 November 1915 |
| Date of enlistment from Nominal Roll | 17 November 1915 |
| Rank on enlistment | Private |
| Unit name | 16th Battalion, 15th Reinforcement |
| AWM Embarkation Roll number | 23/33/3 |
| Embarkation details | Unit embarked from Fremantle, Western Australia, on board HMAT A38 Ulysses on 1 April 1916 |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 15th Light Horse Regiment |
| Fate | Returned to Australia 13 March 1919 |
| Family/military connections | Brothers: 3433 Pte Bernard CUSACK MM, 16th Bn, returned to Australia, 8 April 1919; 1915 Corporal Matthew Paul CUSACK, 28th Bn, returned to Australia, 5 April 1918; 2626 Pte Robert CUSACK, 51st Bn, returned to Australia, 16 October 1916; 2860 Pte William Luke CUSACK, 4th Division Headquarters, returned to Australia, 28 February 1919. |
| Other details | Medals: British War Medal, Victory Medal |