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 and equipment are maintained and used safely.

Key Skills & Experience

Essential:

Proven experience working as a fitter on high-voltage or National 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.

Desirable:

National 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.

Health, Safety & Environmental Responsibilities

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).

Personal Attributes

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.

Working Conditions

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.

Certifications & Training (Typical Requirements)

CSCS/ECS card

National Grid Person /Safety Passport

SF6 Handling / F-Gas Certification

Manual Handling & Working at Height

First Aid (desirable)

Performance Measures

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