| Regimental number | 2229 |
| Religion | Roman Catholic |
| Occupation | Labourer |
| Address | Hurstville, Sydney, New South Wales |
| Marital status | Single |
| Age at embarkation | 22 |
| Next of kin | Father, Thomas Patrick O'Mara, Hurstville, Sydney, New South Wales |
| Enlistment date | 20 October 1915 |
| Rank on enlistment | Private |
| Unit name | 1st Light Horse Regiment, 15th Reinforcement |
| AWM Embarkation Roll number | 10/6/4 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A26 Armadale on 21 March 1916 |
| Rank from Nominal Roll | Driver |
| Unit from Nominal Roll | 10th Field Artillery Brigade |
| Fate | Returned to Australia 18 January 1919 |
