MOS 21E Construction Equipment Operator Duty Descriptions

In 2004, the Engineer MOS changed from CMF 12 to CMF 21. In 2009, the Engineer MOS changed again, from CMF 21 to CMF 12.

Heavy Equipment Operator Team Leader

Provides guidance and recommendations to the Squad Leader regarding section equipment and heavy construction equipment. Ensures accurate tracking of service and maintenance deadlines. Reports and analyzes maintenance records. Assumes responsibility for the well-being, training, discipline, and morale of one NCO and eight Soldiers assigned to the Support Platoon Heavy Equipment Operator section. Collaborates with the unit’s maintenance shop to maintain section equipment valued at over $2 million in support of combat readiness.

Horizontal Construction Supervisor

Supervises engineer projects and delivers instructions for construction equipment operations. Interprets grade stake information accurately. Oversees various heavy equipment operations, including clearing, grubbing, stripping, excavating, backfilling, stockpiling, hauling, and ditch construction. Conducts route reconnaissance. Provides individual and collective training. Maintains accountability for individual and unit equipment and property. Assumes responsibility for the well-being, welfare, and safety of ten Soldiers.

Construction Platoon Sergeant

Supervises and schedules personnel and projects within the construction platoon. Monitors assignment priorities and project progress. Coordinates the procurement of necessary supplies and materials. Ensures the performance of equipment Preventive Maintenance Checks and Services (PMCS). Prioritizes and coordinates equipment maintenance activities. Maintains accountability for individual and unit equipment. Provides training on construction equipment use and operation. Analyzes risks and ensures site safety and security. Assumes responsibility for the welfare, well-being, and professional development of 26 Soldiers.

Heavy Vehicle Operator

Transports heavy equipment, including scrapers, dozers, backhoe loaders, skid steer, and hydraulic excavators. Conducts various operations such as clearing, grubbing, stripping, excavating, backfilling, ditch construction, stockpiling, and pushing scrapers with a crawler tractor. Performs cutting and spreading of fill material using a scraper. Excavates, stockpiles, backfills, and loads using a loader. Assumes responsibility for the health, welfare, and safety of five Soldiers. Maintains accountability for individual and unit equipment. Provides individual and collective training.

Concrete Operations Supervisor

Serves as the Operations NCO of an EN Concrete Section consisting of 12 Soldiers. Oversees the planning, materials procurement, and environmental and civil approval processes for concrete construction projects. Maintains the Yearly Training Calendar, Yearly Training Brief, and METL tasks. Validates training schedules and unit training. Manages training records and prepares Soldiers for MOS training, NCOES/OES, and functional schools. Assumes responsibility for the welfare and physical fitness of 12 Soldiers.

Asphalt Equipment Operator

Sets up and operates an asphalt plant for the production of hot mix asphalt. Operates asphalt laydown equipment to meet desired asphalt specifications. Assumes responsibility for supervising or operating all equipment used in concrete and asphalt production. Ensures compliance with asphalt specifications.

Concrete/Asphalt Equipment Operator

Prepares and places concrete using the M5 Concrete Mobile Mixer Module. Loads the M5 Concrete Mobile Mixer Module with water, Portland cement, fine aggregate, and coarse aggregate. Adjusts controls to achieve the required mix proportions and slump at the project site. Performs site preparation and concrete form construction. Finishes concrete. Conducts maintenance on concrete and engineer equipment.

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