US Department of Defense - Fort Richardson - Responsibilities: Operates heavy, complex riding lawn mowers and similar types of specialized mowing equipment.; Determines and selects the most appropriate type of equipment to accomplish each phase of the work; Completes all aspects of special assignments involving several steps, phases or detailed procedures; Installs forms and lays walks and paths using gravel and asphalt mixes; excavates and backfills ditches and trenches with hand tools; Performs other duties as directed by his/her supervisor