i know that cross leveling in the NG or active component means for a soldier to be attached to or deployed with a unit other than the unit he or she is assigned to for a period of time. Cross leveling is usually done when a unit cant fill its MTOE requirements for a mission. its like a temporary assignment for the lenght of the mission and then the soldier is returned to the orginial unit-Cross Level Tasker maybe the the person who handles cross leveling-ie identifing units needing personnel and assigning them-but thats just a guess