Under direction, the Airport Electrician performs journey-level electrical work to maintain and repair SFO’s high and low voltage electrical systems, ensuring their safe, reliable and continuous operation. This position supports testing and troubleshooting of critical electrical infrastructure to prevent outages and provides technical guidance to tenants and contractors. It also requires accurate record-keeping and adherence to operational policies to maintain compliance and support airport-wide electrical reliability. The role involves work in environments with potential serious injury hazards.   The essential functions of this classification include, but are not limited to, the following:   Maintains, operates and adjusts electrical primary power substations ranging from 2,300 to 12,000 voltage, including circuit breakers, relays, batteries and controls. Maintains high voltage power lines; locates and isolates faulty sections and removes, installs and makes connections where necessary. Installs watt-hour meter systems, connects potential transformers, current transformers, phase shifting transformers, test switches, reactive meters, demand meters and watt-hour meters. Maintains, operates and repairs the 5,000-volt airfield runway lighting system, including taxiways, guidance sign system, airways code beacon, rotating beacon and hazard lights. Maintains, operates and repairs electric motors and control apparatus used in pumping drainage water and sewage. Maintains, operates and adjusts standby engine generators used for emergency power; checks electrical failures for airport, tenants in the absence of tenant personnel in cases of emergency. Collects data for engineer's planned expansion projects and meets with tenants and contractors and advises or availability of facilities for future expansion projects. Inspects completed work for compliance with airport standards and requirements. Performs related duties and responsibilities as assigned.