Maintain numerous mechanical, electrical and electronic components; including Heating and air conditioning systems, cooling only split systems, cooling only packaged systems, packaged and split heat pumps, chilled water systems, heating only systems; convection and radiant heaters; systems may be electric, gas and hydronic operated or a combination of thereof; ventilation and exhaust systems applicable to facility ventilation and industrial equipment ventilation; refrigeration equipment; direct digital control systems and temperature controls; economizers; includes all components for the listed equipment types as well as electrical, gas, and water supply. While performing duties of this job, the employee is occasionally required to stand and/or walk for long periods at a time, sit, use of hands and fingers, handle, or feel objects, tools or controls, reach with hands and arms, climb stairs, climb ladders, balance, stoop, kneel, crouch or crawl, talk or hear, or smell.