Physical Demands: Must possess mobility to work in the field; to sit, stand, and walk on level, uneven, or slippery surfaces; frequently reach, twist, turn, kneel, bend, stoop, squat, crouch, grasp and make repetitive hand movement in the performance of daily duties; to operate varied hand and power tools and construction equipment, and to operate a motor vehicle and visit various County sites; strength, stamina, and mobility to perform medium to heavy physical work, to work in confining spaces and around machines; vision to read printed materials and a computer screen; and hearing and speech to communicate in person, before groups, and over the telephone or radio. Environmental Conditions: Employees work in the field and are exposed to loud noise levels, cold and hot temperatures, inclement weather conditions, road hazards, vibration, confining workspace, chemicals, mechanical and/or electrical hazards, and hazardous physical substances and fumes.