Under direct supervision, performs preventive and corrective maintenance on electrical, instrumentation and control systems including transmitters, analyzers, control valves, PLC I/O, motors, MCCs and field instruments. Troubleshoots electrical faults, signal loops, control wiring and field devices. Executes calibration of pressure, temperature, flow and level instruments. Reads and interprets P&IDs, loop diagrams, wiring diagrams and technical manuals. Assists with installation, testing and commissioning of E&I equipment in industrial and oil & gas facilities. Ensures all work is performed in accordance with HSE regulations, procedures and company standards. Participates in shutdowns, inspections and emergency maintenance activities.