| Regimental number | 2626 |
| Other Names | Robert Joseph |
| Religion | Roman Catholic |
| Occupation | Labourer |
| Address | Geraldton, Western Australia |
| Marital status | Single |
| Age at embarkation | 35 |
| Next of kin | Father, Robert Cusack, 185 Holland Street, Fremantle, Western Australia |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 28th Battalion, 6th Reinforcement |
| AWM Embarkation Roll number | 23/45/2 |
| Embarkation details | Unit embarked from Fremantle, Western Australia, on board HMAT A38 Ulysses on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 51st Battalion |
| Fate | Returned to Australia |
| Miscellaneous information from cemetery records | Plaque in Western Australia Garden of Remembrance |
| Family/military connections | Brothers: 3433 Pte Bernard CUSACK MM, 16th Bn, returned to Australia, 8 April 1919; 4784 Pte Joseph Mark CUSACK, 15th Light Horse Regiment, returned to Australia, 13 March 1919; 1915 Corporal Matthew Paul CUSACK, 28th Bn, returned to Australia, 5 April 1918; 2860 Pte William Luke CUSACK, 4th Division Headquarters, returned to Australia, 28 February 1919. |
| Other details |
Medals: 1914-15 Star, British War Medal, Victory Medal |
| Date of death |