Abstract: A Swiveling Valve Operator Mounting System assembly that consists of a mounting frame that has telescoping components. A turntable or thrust bearing is attached to the mounting frame the turntable bearing also being attached to a truck or trailer bed, and allows rotational motion of the mounting frame relative to the truck or trailer bed. A bearing plate is mounted onto the truck or trailer bed and allows a series of wheel assemblies to bear against the bearing plate to allow smooth rotational motion of the Swiveling Valve Operator Mounting System assembly. The mounting frame has rotation locks that engage holes defined in the bearing plate, and angularly lock the mounting frame into position. The swiveling valve operator mounting system also contains tabs integrated into the bumper or rear of the vehicle or trailer that acts as stops, preventing any unwanted vertical movement of the mounting system while in transit.