Combat engineers construct, alter, repair, and maintain buildings and structures; lift and move heavy objects and equipment by setting up, bracing, and utilizing rigging devices and equipment; and perform various duties incidental to the use of demolitions in construction projects and destruction of objects. Personnel assigned this MOS are taught carpentry and other construction skills as well as demolitions, specialized demolitions for urban breaching and land mine warfare.

The cannon crewmember supervises or serves as a member of field artillery cannon section or ammunition section.

The fire support specialist leads, supervises, or serves in intelligence activities including target processing in Fires Brigades, FA cannon battalions, artillery and maneuver brigades and Corps headquarters in and fire support elements (FSE) respectively.

Combat engineers supervise, or serve, as a member of a team, squad, section, or platoon. They are engaged in providing mobility, counter-mobility and survivability support to combat forces.