| Regimental number | 1146 |
| Place of birth | Portland, Victoria |
| School | State School, Portland, Victoria |
| Religion | Baptist |
| Occupation | Tailor |
| Address | Gawler Street, Portland, Victoria |
| Marital status | Single |
| Age at embarkation | 18 |
| Height | 5' 8.25" |
| Weight | 140 lbs |
| Next of kin | Father, Phillip H Theisinger, Gawler Street, Portland, Victoria |
| Previous military service | Served in the Royal Australian Naval Reserve; still serving at time of AIF enlistment. |
| Enlistment date | |
| Place of enlistment | Melbourne, Victoria |
| Rank on enlistment | Private |
| Unit name | 30th Battalion, A Company |
| AWM Embarkation Roll number | 23/47/1 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A72 Beltana on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 30th Battalion |
| Other details from Roll of Honour Circular | He was in the Naval Forces and served as a signalman for 8 months at he outbreak of war at Heads, Victoria. |
| Fate | Killed in Action |
| Place of death or wounding | Pozieres, Somme Sector, France |
| Age at death | 20 |
| Age at death from cemetery records | 20 |
| Place of burial | No known grave |
| Commemoration details | V.C. Corner (Panel No 2), Australian Cemetery, Fromelles, France |
| Panel number, Roll of Honour, Australian War Memorial | 117 |
| Miscellaneous information from cemetery records | Parents: Philip Henry and Sarah Ann THEISINGER, Gawler Street, Portland, Victoria |
| Other details |
War service: Egypt, Western Front Embarked Sydney, 9 November 1915; disembarked Suez, 11 December 1915. Embarked Alexandria to join the British Expeditionary Force, 16 June 1916; disembarked Marseilles, France, 23 June 1916. Killed in action, 20 July 1916. Medals: 1914-15 Star, British War Medal, Victory Medal |
| Sources | NAA: B2455, THEISINGER Norman Loys |