Ability to stand for extended periods of time; stoop, bend, and crouch; lift and carry at least 50 pounds personally, and up to 150 pounds with assistance; frequently work with hands extended overhead, sometimes in conjunction with the use of hand power tools; climb on/off heavy mobile equipment safely; walk on uneven surfaces, including natural ground, in varying weather. Work outdoors in all weather conditions (including very hot and very cold weather), near heavy equipment and moving machinery, and with periodic exposure to high levels of noise, grease, and dust.