| Regimental number | 910 |
| Place of birth | Broken Hill New South Wales |
| Other Names | Roderick Thomas |
| Religion | Roman Catholic |
| Occupation | Timberman |
| Address | Kalgoorlie, Western Australia |
| Marital status | Single |
| Age at embarkation | 23 |
| Next of kin | Brother, Hugh Ahearn, c/o Hanley, Butcher, Kalgoorlie, Western Australia |
| Enlistment date | 2 December 1915 |
| Date of enlistment from Nominal Roll | 2 December 1915 |
| Rank on enlistment | Sapper |
| Unit name | Mining Corps, Company 3 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A38 Ulysses on 20 February 1916 |
| Rank from Nominal Roll | Sapper |
| Unit from Nominal Roll | 3rd Tunnelling Company |
| Fate | Returned to Australia 19 April 1919 |