| Regimental number | 5 |
| Place of birth | Gympie, Queensland |
| School | Maryborough and Rockhampton Grammar Schools, Queensland |
| Religion | Presbyterian |
| Occupation | Surveyor |
| Address | Indooroopilly, Brisbane, Queensland |
| Marital status | Single |
| Age at embarkation | 24 |
| Next of kin | Mrs D G Sinclair, Indooroopilly, Brisbane, Queensland |
| Enlistment date | |
| Rank on enlistment | Sapper |
| Unit name | 3rd Field Company Engineers, Headquarters, Section 1, Section 2 and Section 4 |
| AWM Embarkation Roll number | 14/22/1 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board Transport A2 Geelong on |
| Rank from Nominal Roll | Sapper |
| Unit from Nominal Roll | 3rd Field Company Engineers |
| Other details from Roll of Honour Circular | RoHC lists additional middle name as Bruce. |
| Fate | Killed in Action |
| Place of death or wounding | Gallipoli, Turkey |
| Age at death | 24 |
| Age at death from cemetery records | 24 |
| Place of burial | Shell Green Cemetery (Plot I, Row F, Grave No. 10), Gallipoli, Turkey |
| Panel number, Roll of Honour, Australian War Memorial | 25 |
| Miscellaneous information from cemetery records | Parents: Donald and Agnes SINCLAIR, Longreach, Queensland. Native of Indooroopilly, Queensland |
| Family/military connections | Brother: (No.6) Major David George Sinclair MID, 1st Field Company Australian Engineers. |
| Other details |
War service: Egypt, Gallipoli Medals: 1914-15 Star, British War Medal, Victory Medal |