| Regimental number | 3120 |
| Place of birth | Foster Victoria |
| Religion | Church of England |
| Occupation | Bank clerk |
| Address | Police station, West Footscray, Victoria |
| Marital status | Single |
| Age at embarkation | 18 |
| Next of kin | Father, Joseph Sinclair Mackay, West Footscray, Police Station, Victoria |
| Enlistment date | 10 July 1916 |
| Rank on enlistment | Private |
| Unit name | 4th Light Horse Regiment, 24th Reinforcement |
| AWM Embarkation Roll number | 10/9/3 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A67 Orsova on 6 December 1916 |
| Rank from Nominal Roll | Driver |
| Unit from Nominal Roll | 10th Field Artillery Brigade |
| Fate | Returned to Australia 31 March 1919 |