Performs semi-skilled work and assists higher-level coworkers in performing further-skilled tasks in the repair, maintenance, and installation of building, plumbing fixtures/equipment, air-conditioning, electrical, and other mechanical equipment. Preferred qualifications include (must specify on application): Formal training in building maintenance/construction trades, Experience repairing, maintaining, or installing carpentry, plumbing, electrical, or air-conditioning equipment in a commercial/institutional/correctional facility, and.