
| Date of birth | |
| Place of birth | Timaru, New Zealand |
| Religion | Presbyterian |
| Occupation | Clerk |
| Address | Middle Brighton, Victoria |
| Marital status | Married |
| Age at embarkation | 31 |
| Next of kin | Wife, Mrs J MacKenzie, 'Truro', Roslyn Street, Middle Brighton, Victoria |
| Enlistment date | |
| Rank on enlistment | Major |
| Unit name | Australian Naval and Military Expeditionary Force, Army Medical Corps |
| AWM Embarkation Roll number | 23/112/5 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board SS Morinda on |
| Rank from Nominal Roll | Lieutenant Colonel |
| Unit from Nominal Roll | Australian Naval & Military Expeditionary Force |
| Promotions |
Lieutenant Colonel Promotion date: |
| Fate | Returned to Australia |
| Discharge date | |
| Other details |
War service: embarked Sydney for Rabaul, 17 March 1915. Disembarked Sydney, 2 January 1921. Discharged (appointment terminated), 6 January 1921. Medal: British War Medal Author of Vol. 10 ('The Australians at Rabaul', pub. 1927) of the 'Official History of Australia in the War of 1914-1918', C.E.W. Bean, ed. |
| Miscellaneous details | Name incorrectly recorded on Embarkation Roll as McKENZIE. |
| Date of death | |
| Age at death | 72 |
| Sources | NAA: B2455, MacKENZIE Seaforth Simpson
'Australian Dictionary of Biography', vol. 10, pp. 304-05 |