| Regimental number | 28171 |
| Occupation | Seaman |
| Next of kin | Father, Jens V Mortensen, Piopio, Te Kuiti |
| Rank on embarkation | Private |
| Unit name | New Zealand Expeditionary Force, 18th Reinforcements, Wellington Infantry Battalion, B Company |
| Embarkation details | Unit embarked from Wellington on board Willochra on |
| Family/military connections | Brothers: 10/3959 Ernest Ainer MORTENSEN; 10/623 Ole Peter MORTENSEN |
| Sources | Nominal Roll Vol. 2: Roll 43, p. 8 |