| Regimental number | 6258 |
| Place of birth | Goulburn New South Wales |
| Religion | Roman Catholic |
| Occupation | Carpenter |
| Address | 11 Barker Street, Lewisham, New South Wales |
| Marital status | Single |
| Age at embarkation | 25 |
| Next of kin | Mother, Mrs E Glennen, 11 Barker Street, Lewisham, New South Wales |
| Enlistment date | 30 March 1916 |
| Rank on enlistment | Private |
| Unit name | 13th Battalion, 20th Reinforcement |
| AWM Embarkation Roll number | 23/30/4 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A14 Euripides on 9 September 1916 |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 13th Battalion |
| Fate | Returned to Australia 2 June 1919 |
| Miscellaneous details (Nominal Roll) | *Spelt Cyril Allan Glennen on NR |
| Date of death | 18 November 1956 |
| Place of burial | Rookwood Necropolis |
