Mechanical​/Electrical Fitter – GIS & SF6 Specialist in Nationwide

Job Title:

Mechanical/Electrical Fitter ( Grid Sites – GIS & SF6 Specialist)

Location:

Various Grid Sites (UK-wide travel required)

Reports To:

Site Supervisor / Project Manager

To carry out installation, maintenance, and refurbishment of high-voltage equipment on 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.

• Perform mechanical and electrical fitting activities on high-voltage equipment at 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 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 and equipment are maintained and used safely.

• Proven experience working as a fitter on high-voltage or Grid sites.
• Hands-on experience with Gas Insulated Switchgear (GIS).
• Certified or experienced in SF6 gas handling and environmental compliance.
• Ability to work from technical drawings and specifications.
• Strong understanding of health & safety practices in high-risk environments.
• Full UK driving licence and willingness to travel.

• Grid Competent Person.
• Relevant engineering qualification (e.g. NVQ Level 3, City & Guilds, or equivalent).
• F-Gas certification for SF6 handling.
• Experience in substation construction or maintenance projects.
• Knowledge of commissioning processes and testing procedures.

Comply with all Health & Safety legislation, site rules, and company procedures.

Ensure safe handling, storage, and disposal of SF6 gas.

Minimise environmental impact and report any leaks or incidents immediately.

Participate in toolbox talks, risk assessments, and method statements (RAMS).

• Strong attention to detail and commitment to quality.
• Ability to work independently and as part of a team.
• Good communication and reporting skills.
• Flexible and adaptable to changing site conditions.
• Proactive approach to problem-solving.

Site-based role with frequent travel and potential overnight stays.

Work may involve outdoor conditions and high-voltage environments.

Occasional requirement for overtime and weekend work during outages.

• CSCS/ECS card
• Grid Person /Safety Passport
• SF6 Handling / F-Gas Certification
• Manual Handling & Working at Height
• First Aid (desirable)

• Compliance with safety and environmental standards
• Quality and accuracy of installations and maintenance work
• Completion of tasks within agreed timelines
• Proper documentation and reporting of SF6 usage and site activities

Note:

This role requires strict adherence to safety and environmental regulations due to the handling of high-voltage equipment and greenhouse gases such as SF6