Job Title: Mechanical/Electrical Fitter (National Grid Sites – GIS & SF6 Specialist) Location: Various National Grid Sites (UK-wide travel required) Reports To: Site Supervisor / Project Manager To carry out installation, maintenance, and refurbishment of high-voltage equipment on National Grid sites, with a particular focus on Gas Insulated Switchgear (GIS) and SF6 gas handling. The role requires strict adherence to safety, environmental, and quality standards while ensuring operational efficiency and compliance with industry regulations. Key Responsibilities Perform mechanical and electrical fitting activities on high-voltage equipment at National Grid substations. Install, maintain, and overhaul Gas Insulated Switchgear (GIS) systems Carry out SF6 gas handling, including: Filling, topping up, and reclaiming SF6 gas Leak detection and reporting Gas quality testing and monitoring Ensure all SF6 handling complies with F-Gas regulations and environmental standards. Read and interpret engineering drawings, schematics, and technical documentation. Support commissioning, decommissioning, and fault-finding activities. Work in accordance with National Grid safety rules, permits, and procedures. Maintain accurate records of work completed, including gas usage and test results. Assist in outage planning and execution. Collaborate with engineers, supervisors, and other trades on site. Ensure all tools...