Munda wa 12 - Akatswiri a Zanjiniya
Asilikali omwe analembetsa ntchito amatchedwa "MOS," kapena "Military Occupation Specialties".
Asilikali amagawanitsa MOS awo ku "Masimu," a ntchito zomwe ziri ndi mautumiki ofanana. M'munsimu muli MaOS omwe ali a Corps Engineer Field :
12A- Engineer Senior Sergeant
12B - Wongomanga Zomangamanga
12C - Bridge Crewmember
12D - Diver
12G - Kuthetsa Katswiri
12H - Woyang'anira Udindo wa Construclon
12K - Mapulani
12N - Ngayinja Yomangamanga Yokwanira
12P - Wopanga Mphamvu Yopanga Mphamvu
12Q-Mtsogoleri Wopereka Kugawanika kwa Mphamvu
12R - Wachilengedwe wamagetsi
12T - Technical Engineer
12V - Ntchito Yomanga ndi Asphalt
12W - Katswiri wa Kupentala ndi Kukonza
12X - Woyang'anira Zomangamanga Zonse
12Y - Engineer Geospatial Engineer
12Z - Oyang'anira Zomangamanga Akuluakulu Oyang'anira