Ahua 12 - Nga Kaitoi
Whakauruhia ai nga mahi a te ope i "MOSs," ranei "Nga Tohu Whakanui Mo Nga Mahi Pirihimana."
Ka wehewehe te Ope Taua i o ratou MOS ki "Nga Maatai," o nga mahi e whai ana i nga misioni rite. Kei raro ko nga MOS o te Corps of Field Engineer :
12A- Sergeant Senior Engineer
12B - Te Kaiwhakahaere Whawhai
12C - Piriti Bridge
12D - Mutu
12G - Nga Kaihauturu Miihini
12H - Constructlon Engineering Supervisor
12K - Plumber
12M - Kaipare
12N - Hangarau Hangaia Whakapae
12P - Kaihauturu Whakaaturanga Rawa Matua
12Q -Whakaarohia te Kaihauturu Tohatoha Raina
12R - te honore Electrician
12T - Kaiwhakahaere Hangarau
12V - Te Kaiwhakahaere Mahi Whakarite me te Whakanui
12W - Kaihanga me te Kaihanga Miihini
12X - Kaiwhakahaere Whakahaere Ingarangi
12Y - Geospatial Engineer
12Z - Te Kaihautū Toi Toihau Toihau