| Regimental number | 12633 |
| Place of birth | Ballarat, Victoria |
| School | Ballarat High School, Camp Street, Victoria |
| Religion | Church of England |
| Occupation | Commercial traveller |
| Address | East Melbourne, Victoria |
| Marital status | Married |
| Age at embarkation | 37 |
| Next of kin | Wife, Mrs B Maidment, 67 Patterson Street, Middle Park, Victoria |
| Enlistment date | |
| Date of enlistment from Nominal Roll | |
| Rank on enlistment | Driver |
| Unit name | S.T25.17_18.3DT5 |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 3rd Motor Transport Company |
| Other details from Roll of Honour Circular | Died at 5th General Hospital, B.E.F., France. |
| Fate | Died of disease |
| Miscellaneous details (Nominal Roll) | *given name two spellings Sidney and Sydney |
| Place of death or wounding | France |
| Age at death | 39 |
| Place of burial | St. Sever Cemetery Extension (Block Q, Plot I, Row H, Grave No. 3), Rouen, France |
| Panel number, Roll of Honour, Australian War Memorial | 181 |
| Miscellaneous information from cemetery records | Parents: Levi and Helen Ann MAIDMENT; husband of Elizabeth MAIDMENT, 136 Wright Street, Middle Park, Victoria. Native of Ballarat, Victoria |
| Family/military connections | Uncle to Trooper William Allardyce Ross 10th Light Horse killed in action at the Dardanelles on Aug 7th 1915. |