Working knowledge and skills in heating, air conditioning, plumbing, electrical, carpentry, cleaning methods, cleaning equipment, safety systems, and pool operationsWorking knowledge and skills in heating, air conditioning, plumbing, electrical, carpentry, cleaning methods, cleaning equipment, safety systems, and pool operations. Constantly performs essential maintenance to facility or equipment which may include but are not limited to the following activities: partial-reach to full-reach overhead, crouching, kneeling, shoveling, working in narrow and/or confining spaces underground, overhead, and at ground level, twisting of the waist, shoulders, and legs, and lying on stomach and/or back.