| Religion | Congregational |
| Occupation | Gentleman |
| Address | 97 Bridge Road, Richmond, Victoria |
| Marital status | Single |
| Age at embarkation | 20 |
| Next of kin | Father, J D Hennessey, Twickenham House, 97 Bridge Road, Richmond, Victoria |
| Enlistment date | NO ENTRY |
| Rank on enlistment | Lieutenant |
| Unit name | 6th Battalion, 12th Reinforcement |
| AWM Embarkation Roll number | 23/23/3 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A40 Ceramic on 23 November 1915 |
| Rank from Nominal Roll | 2nd Lieutenant |
| Unit from Nominal Roll | 6th Battalion |
| Fate | Killed in Action 10 February 1917 |
| Miscellaneous details (Nominal Roll) | *noted as HENNESSEY on NR |
