Senior Authorised Person - Electrical

JOB DESCRIPTION

This role supports Costain for the Reactor Height Reduction Project at Nuclear Restoration Services (NRS) Trawsfynydd Site, based in North Wales. The 3.5 year project will involve the partial demolition of each reactor building, reducing the overall height and reducing the current asset management liability. In addition, an extensive package of civil new build and remedial works will be delivered to prolong the durability of the retained structures.

A first‑of‑its‑kind project for the nuclear sector; this challenging and exciting project includes a wide supply chain and will significantly reduce the uncertainty associated with the current condition of the reactor buildings and lessen the visual impact caused by the reactor buildings on the Snowdonia National Park.

• Act as the duty holder for electrical safety, ensuring the safe operation, isolation and control of HV and LV electrical systems in accordance with the site electrical safety rules.
• Provide technical authority, leadership and assurance for electrical activities, acting as a focal point between operations, engineering, contractors and the permit office.
• Support the permit office, ensuring permits are correctly specified, coordinated and controlled, with particular focus on electrical interfaces and energy isolation.
• Maintain safe systems of work, preventing energisation incidents and enabling activities to proceed safely and efficiently.
• Act as the Senior Authorised Person Electrical in accordance with the site safety rules, including authorisation, isolation, earthing and re‑energisation of electrical systems.
• Plan, implement and control electrical isolations and switching programmes, coordinating with operations, construction and the permit office.
• Provide technical review and approval of electrical aspects of permits to work, RAMS, switching schedules and isolation plans.
• Support the permit office function, issuing, suspending and closing permits, ensuring interfaces between electrical and other activities are effectively managed.
• Monitor and assure contractor compliance with electrical safety standards, site rules and permit conditions through inspections, audits and oversight.
• Investigate electrical incidents, near misses and non‑conformances, contributing to lessons learned, corrective actions and continuous improvement.

• Current or previously held SAP for HV and/or LV systems.
• Strong working knowledge of electrical safety rules, isolation procedures, lock‑off, earthing and energisation controls.
• Proven ability to interpret electrical drawings, SLDs and switching schedules.
• Demonstrable commitment to safety leadership, procedural compliance and risk management.

• Experience operating a permit‑to‑work system.
• Experience working in nuclear, high‑hazard, or heavily regulated environments.
• Prior experience of working with a permit office or control of work team.
• Knowledge of temporary electrical systems associated with construction, demolition or temporary works.

• Formal electrical qualifications and membership of a relevant professional body.

• IOSH or NEBOSH Managing Safely.
• CSCS Supervisor Gold card.
• Control & Supervision of SSoW.

Costain helps to improve people’s lives with integrated, leading edge, smart infrastructure solutions across the UK’s energy, water, transportation and defence markets. We help our clients improve their business performance by increasing capacity, improving customer service, safeguarding security, enhancing resilience, decarbonising and delivering increased efficiency. Our vision is to be the UK’s leading smart infrastructure solutions company. We will achieve this by focusing on blue chip clients whose major spending plans are underpinned by strategic national needs, regulatory commitments, legislation or essential performance requirements.

We offer our clients leading edge solutions that are digitally optimised through the following five services which cover the whole lifecycle of their assets: future‑shaping strategic consultancy; consultancy and advisory; digital technology solutions; asset…