| Regimental number | 2678 |
| Place of birth | Mitiamo, Victoria |
| School | Terrick South State School, Victoria |
| Religion | Methodist |
| Occupation | Farmer |
| Address | Mitiamo, Victoria |
| Marital status | Single |
| Age at embarkation | 20 |
| Next of kin | Father, Hugh Mullen, Mitiamo, Victoria |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 2nd Pioneer Battalion, Reinforcement 5 |
| AWM Embarkation Roll number | 14/14/4 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A10 Karroo on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 2nd Pioneer Battalion |
| Fate | Killed in Action |
| Place of death or wounding | Zonnebeke, Belgium |
| Age at death | 21 |
| Age at death from cemetery records | 21 |
| Place of burial | Aeroplane Cemetery (Plot III, Row A, Grave No. 7), Ypres, Belgium |
| Panel number, Roll of Honour, Australian War Memorial | 172 |
| Miscellaneous information from cemetery records | Parents: Hugh and Mary MULLEN, Terrick South, Victoria. Native of Mitiamo |
| Family/military connections | Brother of Hugh who was first Australian soldier to be buried in England. |