| Regimental number | 18217 |
| Occupation | Civil servant |
| Next of kin | Brother, William O'Leary, Henley, Otago |
| Rank on embarkation | 2nd Lieutenant |
| Unit name | New Zealand Expeditionary Force, New Zealand Rifle Brigade, 10th Reinforcements to 2nd Battalion, F Company |
| Embarkation details | Unit embarked from Wellington on board HMNZT 61 Aparima on |
| Sources | Nominal Roll Vol. 2: Roll 38, p. 30 |