| Regimental number | 1711 |
| Place of birth | Lanark Scotland |
| Religion | Presbyterian |
| Occupation | Herd-tester |
| Marital status | Single |
| Age at embarkation | 20 |
| Next of kin | Father, Dr Hugh Mackay, Cambaslang, Lanarkshire, Scotland |
| Enlistment date | 3 June 1915 |
| Rank on enlistment | Private |
| Unit name | 25th Battalion, 2nd Reinforcement |
| AWM Embarkation Roll number | 23/42/2 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A9 Shropshire on 20 August 1915 |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 9th Battalion |
| Fate | Returned to Australia 21 March 1919 |