Maintains external fuel and grounding systems; performs scheduled and unscheduled maintenance on AGE/GSE; inspects, tests, and operates AGE/GSE to determine equipment serviceability and proper operation; services equipment with fuel, oil, water, coolant, hydraulic fluid, refrigerant, and compressed air; diagnoses mechanical and electronic circuitry malfunctions using visual and auditory senses, test equipment, and technical publications. Maintains vehicle records, and updates paper and electronic equipment records; provides dispatch service for AGE/GSE, including positioning equipment to support aircraft maintenance and flying operations; practices good housekeeping, tool control, Foreign Object Damage prevention, and safety at all times.