The 12W Army MOS (Military Occupational Specialty) refers to Carpentry/Masonry Specialist within the Army. Individuals serving in this MOS undertake tasks related to both carpentry and masonry work within the military setting. They are responsible for constructing wooden structures like buildings and installing doors or windows using appropriate techniques and tools associated with carpentry work. Additionally, they also perform masonry tasks such as building concrete forms to mold concrete structures like foundations or walls for construction projects. The role entails reading blueprints or technical drawings related to construction projects while adhering to safety regulations as well as elevated occupational standards specific to the Army's requirements within the Carpentry/Masonry field.