Maritime Expeditionary Support Training and Evaluation Unit ONE, under the direction of MESG ONE, serves as the executive agent for Maritime Expeditionary Security Force (MESF) schoolhouse curriculum management, training, assessment and certification recommendations of Units of Action. When requested, as directed by MESG ONE, Training and Evaluation Unit conducts unit level training for MESF Units of Action and personnel to support major combat operations, global force management, and MESF approved Navy Mission Essential Task List.