Authorised Person
Mercury
London
Authorised Person, London Apply Now 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, it is our duty to encourage and back our people to realise their vision of themselves. We place them 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. Safety Key Responsibilities of the Role:
- Become familiar with, comply with and enforce through permitting and auditing, the relevant Mercury SOP’s including but not limited to Control of Hazardous Energies Procedure and Operating and Energisation Procedures for Work on LV & MV Systems.
- Understand the need for and adherence to the Permit to Work and Lock-Out Tag-Out Procedures and follow safe working practices.
- Understanding of the Mercury site specific ESSOW (Electrical Safe System of Work).
- Review and understanding of Sub-Contractor COHE (Control of Hazardous Energies)
- Review and approve Sub-Contractor Electrical RAMS
- Ensure that all works are conducted in accordance with the client directives.
- Operational control of the LOTO systems
- Operational control of safe switching (Energisation/Isolations) during the commissioning phase.
- Ensure that all warning signs are in place and checked at regular intervals
- Reporting of any electrical incidents to SAP and Energy Marshall
- Ensure the segregation of hazardous areas and the correct use of Electrical PPE
- Successfully complete any training deemed necessary by Mercury in the jurisdiction.
- Identify potential hazards and implement mitigation measures.
- Ensure areas are secured which are under permit control.
- Assist Senior Authorised Persons to remain compliant in the completion of the necessary internal audits such as Self-Assessment COHE Audit and Audit for the inspection of temporary electrics.
- Be conversant with Arc flash mitigation including PPE selection, condition and maintenance.
- Authorise Energisation and Isolation Requests once all criteria have been met for the nominated voltage range
- Follow the instruction of the Senior Authorised Person.
- If not done so during proof of qualification, provide evidence of successful completion of colour vision test.
- Be a qualified electrician awarded the National Craft Certificate as part of the national Framework of Qualifications or equivalent in the jurisdiction and verified by Naric.
- Have successfully obtained a suitable electrical award, equivalent to Level 6 or higher on the National Framework of Qualifications.
- Understand, interpret and work from various forms of project drawings such as SLD's, Wiring Diagrams, schematics etc.
- Understanding of EN and local code Regulations.
- Be or become conversant with latest local jurisdictional electrical regulations.
- Where the jurisdiction requires, complete a recognised course in Verification, Testing and Certification.
- Inspect, commission, troubleshoot, associated control systems and power circuits and switchgear
- Perform a variety of commissioning duties including, but not limited to, MCC's, VSD's, distribution panels, motors, lighting and small power circuits.
- Demonstrate a full understanding of all applicable policies and work methods associated with assigned duties to commission electrical equipment and to perform other duties as required.
- Understand, interpret and work from various forms of project documentation such as Punchlist Procedure, As Built Procedure, Vendor Manuals etc.
- Perform testing, Insulation Resistance, Point to Point, grounding etc. providing a sound knowledge of the testing equipment to be utilised. Ensure all pre-connection/ dead test results are compliant in the jurisdiction.
- Take live readings (Phase rotation, voltage level, etc.) post energisation and record on energisation request form. Ensure all post-connection/ live test results are compliant in the jurisdiction.
- Perform and demonstrate Live Dead Live testing as required.
- Perform panel inspections and complete ‘Pre Energisation Checklists’ prior to energisations.
- Execution of switching schedules/notes post approval from the SAP and Energy Marshall
- Perform safe energisations, isolations and functional switching
- Ensure that the correct tags are applied to all equipment awaiting energisation
- Assistance within the Commissioning process from Level 1 through to Level 5.
- Enforcement of the Electrical Permit to Work system, Approve/ cancel/ close electrical safety related permits relating to the voltage range you are nominated for. (Low Voltage/ Medium voltage)
- Establish and maintain positive and effective working relationships with site supervisors, peer workers and vendors.
- Review of commissioning process’
- Assist in electrical incident investigations
- Monitor the condition of PPE and safety equipment, advice Senior Authorised Person of calibration requirements or replacement safety equipment as required.
- Have completed a recognised MV/HV switching course if being appointed as an MV Authorised Person
- Must have worked on MV systems for a minimum of three years
- Site management of the Mercury “In Progress” snagging system ensuring that the supervisors conduct the works is a safe and controlled manner.
- Report any electrical events to SAP
- Issue internal weekly progress report, to the SAP, highlighting all changes in electrical conditions on site.
- Ensure that communications to the SAP and CxA are timely, clear and precise in relation to switching operations.
- Ensure any concerns and updates are offered to the Person in Charge of an Electrical Installation and Senior Engineer
- Demonstrated history of delivering HV/MV Infrastructure projects, DC / DNO / IDNO / Power Generation (If being appointed as an Authorised Person for MV, be familiar with LV infrastructure and equipment if being nominated as an Authorised Person for LV)
- Experience managing work and safety precautions across control boundaries.
- Experience performing / supervising advance cable works including phasing, testing, identifying & spiking (Spiking is a specialist skill requiring a licence in many jurisdictions, it may not be required as essential but experience of, and being conversant with the process is essential)
Posted 2025-11-30
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