| Regimental number | 4369 |
| Place of birth | Laidley Creek, Queensland |
| School | Forest Hill State School, Queensland |
| Religion | Methodist |
| Occupation | Farmer |
| Address | Forest Hill, Queensland |
| Marital status | Single |
| Age at embarkation | 23 |
| Next of kin | Father, James Christian Nielsen, Forest Hill, Queensland |
| Enlistment date | |
| Date of enlistment from Nominal Roll | |
| Rank on enlistment | Acting Corporal |
| Unit name | 26th Battalion, 11th Reinforcement |
| AWM Embarkation Roll number | 23/43/3 |
| Embarkation details | Unit embarked from Brisbane, Queensland, on board HMAT A16 Star Of Victoria on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 26th Battalion |
| Fate | Killed in Action |
| Place of death or wounding | France |
| Age at death | 25 |
| Age at death from cemetery records | 25 |
| Place of burial | Bethlehem Farm West Cemetery (Row A, Grave No. 33), Messines, belgium |
| Panel number, Roll of Honour, Australian War Memorial | 108 |
| Miscellaneous information from cemetery records | Commemorated in Forest Hill Cemetery, Queensland. Son of Sarah Jane NIELSEN, Forest Hill, Queensland |
| Family/military connections | Brother: Norman Albert NEILSEN MM, 41st Bn |
| Other details |
War service: Western Front Medals: British War Medal, Victory Medal |