| Regimental number | 1687 |
| Place of birth | Melbourne Victoria |
| Religion | Presbyterian |
| Occupation | Jeweller |
| Address | Cairns, Queensland |
| Marital status | Single |
| Age at embarkation | 31 |
| Next of kin | Brother, John R Mackay, Jandowaie, Queensland |
| Enlistment date | 17 December 1915 |
| Rank on enlistment | Private |
| Unit name | 47th Battalion, 2nd Reinforcement |
| AWM Embarkation Roll number | 23/64/3 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board SS Hawkes Bay on 20 April 1916 |
| Rank from Nominal Roll | Sergeant |
| Unit from Nominal Roll | 47th Battalion |
| Fate | Returned to Australia 26 September 1917 |
