Authorised Person

Overview

Authorised Person, London. Mercury is the European leader in construction solutions. We build and manage complex engineering & construction projects for the world’s leading corporations. Our solutions help deliver technologies and life changing advancements that connect people, communities, and businesses, giving them the power to achieve incredible things. Our people have the courage to be innovative. Their determination and sharp focus enable us to deliver with certainty, time and time again.

We deliver our clients’ visions through leading edge construction solutions across multiple sectors, including Enterprise Data Centres, Advanced Technology & Life Sciences, Hyperscale Data Centres, Fire Protection. At Mercury, we place our people at the heart of what we do, providing challenging opportunities to develop within a great team in a supportive environment that allows them to reach their full potential.

Key Responsibilities of the Role

• Become familiar with, comply with and enforce Mercury SOPs including Control of Hazardous Energies Procedure and Operating and Energisation Procedures for Work on LV & MV Systems, through permitting and auditing.
• Understand and adhere to Permit to Work and Lock-Out Tag-Out Procedures; follow safe working practices.
• Understand Mercury site-specific ESSOW (Electrical Safe System of Work).
• Review and understand Sub-Contractor COHE (Control of Hazardous Energies) and Sub-Contractor Electrical RAMS; ensure works align with client directives.
• Operational control of LOTO systems and safe switching (Energisation/Isolations) during the commissioning phase.
• Ensure warning signs are in place and checked regularly; report electrical incidents to SAP and Energy Marshall.
• Ensure proper segregation of hazardous areas and correct use of Electrical PPE; secure areas under permit control.
• Complete training deemed necessary by Mercury; identify hazards and implement mitigation measures.
• Assist Senior Authorised Persons with internal audits (Self-Assessment COHE Audit, inspection of temporary electrics).
• Be conversant with arc flash mitigation, PPE selection, condition and maintenance; authorise Energisation and Isolation Requests when criteria are met for the nominated voltage range; follow Senior Authorised Person instructions.
• Provide evidence of required qualifications (e.g., colour vision test) if not provided during proof of qualification.

Technical / Essential Criteria

• Be a qualified electrician awarded the National Craft Certificate or equivalent, verified by Naric, or have a suitable electrical award equivalent to Level 6 or higher on the National Framework of Qualifications.
• Ability to interpret and work from project drawings (SLDs, Wiring Diagrams, schematics) and understand EN and local code regulations; stay conversant with latest local electrical regulations.
• Complete recognised courses in Verification, Testing and Certification where required.
• Experience inspecting, commissioning, troubleshooting control systems and power circuits; perform commissioning duties (MCCs, VSDs, distribution panels, motors, lighting, small power circuits).
• Demonstrate understanding of policies and work methods for commissioning electrical equipment; interpret documentation such as Punchlist, As Built Procedures, Vendor Manuals.
• Perform testing (Insulation Resistance, Point to Point, grounding) with appropriate equipment; ensure pre-connection/dead test results are compliant; take live readings post-energisation and record results; perform Live Dead Live testing as required.
• Execute switching schedules/notes post-approval; perform safe energisations and isolations; apply correct tags to equipment awaiting energisation; assist in the commissioning process from Level 1 to Level 5.
• Enforce Electrical Permit to Work system; manage electrical safety permits for the relevant voltage range (Low/Medium Voltage).
• Establish positive working relationships with site supervisors, peers and vendors; review commissioning processes; assist in electrical incident investigations.
• Monitor PPE and safety equipment; advise on calibration or replacement as required; have completed a recognised MV/HV switching course if appointed as MV Authorised Person; minimum three years’ experience working on MV systems.

Communication / Reporting

• Manage Mercury’s “In Progress” snagging system to ensure safe and controlled works; report electrical events to SAP; issue weekly progress reports highlighting changes in electrical conditions.
• Maintain timely, clear, and precise communication with SAP and CxA regarding switching operations; communicate concerns to the Person in Charge of an Electrical Installation and Senior Engineer.

Equality

Mercury is an equal opportunities employer

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