| Regimental number | 2646 |
| Place of birth | Wollomombi, New South Wales |
| School | Oakton Public School, New South Wales |
| Religion | Roman Catholic |
| Occupation | Grazier |
| Address | Yooroonah PO, Yooroonah via Armidale, New South Wales |
| Marital status | Single |
| Age at embarkation | 23 |
| Next of kin | Father, Dennis Mullen, Yooroonah PO, Yooroonah via Armidale, New South Wales |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 1st Light Horse Regiment, 18th Reinforcement |
| AWM Embarkation Roll number | 10/6/4 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A20 Hororata on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 18th Company, Imperial Camel Corps |
| Fate | Died of wounds |
| Place of death or wounding | Palestine |
| Age at death | 26 |
| Place of burial | Beersheba War Cemetery (Row C, Grave No. 35), Palestine |
| Panel number, Roll of Honour, Australian War Memorial | 10 |
| Miscellaneous information from cemetery records | Parents: Dennis and Alice MULLEN. Native of Yooroonah, Armidale, New South Wales |