Yarding supervisor Supervises and coordinates activities of workers engaged in felling and bucking trees, skidding logs from forest, and loading logs on trucks: Trains workers in felling and bucking trees, operation of tractors and loading machines, yarding and loading techniques, and safety regulations. Performs duties as described under SUPERVISOR (industry) Master Title. When logging activities are confined to one side of timber stand or tract, may also be designated Side Boss (logging industry).