Senior Authorised Person

Senior Authorised Person – Data Centre Project (Frankfurt, Germany)
€95,000 – €110,000 + Rotation + Accommodation + Travel + €32,000 Net Living Allowance
Contract Type: Full-Time / Permanent
Location: Frankfurt, Germany

An experienced Authorised Person (Electrical) is required to join a major data centre project in Frankfurt, Germany. This is a critical site-based role, responsible for the safe operation, testing, and commissioning of electrical systems (LV/MV) across the site. You will work closely with Senior Authorised Persons, Energy Marshalls, and the Commissioning team to enforce electrical safety procedures, manage permits, and support energisation activities.

This is a hands-on role for qualified electricians or electrical engineers with strong high-voltage and medium-voltage experience. The position offers exposure to technically complex, mission-critical data centre infrastructure and a collaborative, safety-driven work environment.

Key Responsibilities

• Enforce Mercury’s Electrical Safe System of Work (ESSOW) and ensure adherence to Control of Hazardous Energies Procedures
• Issue, approve, and manage permits for all LV and MV electrical works
• Follow Lock-Out Tag-Out (LOTO) procedures and permit-to-work systems to ensure safe energisation and isolation
• Conduct regular audits, inspections, and reporting of site electrical safety
• Ensure segregation of hazardous areas and proper use of PPE
• Assist in internal audits such as COHE self-assessments and temporary electrics inspections
• Support Senior Authorised Persons to remain compliant with site safety standards
• Identify potential hazards and implement mitigation measures

• Perform testing, commissioning, and energisation of electrical systems including MCCs, VSDs, distribution panels, motors, lighting, and small power circuits
• Review and interpret project drawings, SLDs, wiring diagrams, schematics, and vendor manuals
• Conduct insulation resistance, point-to-point, grounding, and live-dead-live testing
• Execute switching schedules in coordination with the Energy Marshall and SAP
• Inspect and sign off panels, perform pre-energisation checklists, and approve energisation requests within nominated voltage ranges
• Participate in commissioning activities from Level 1 through Level 5, supporting the full system handover
• Monitor and advise on PPE and safety equipment condition, ensuring calibration and replacements as needed
• Assist in electrical incident investigations

• Maintain accurate records in Mercury’s snagging and progress systems
• Report all electrical events to SAP and the Commissioning Authority (CxA) promptly
• Issue weekly progress reports highlighting changes in electrical conditions
• Provide timely updates and guidance to project engineers, site supervisors, and commissioning teams

Essential Criteria

• Qualified electrician (National Craft Certificate or equivalent Level 6 qualification) or equivalent electrical engineering award
• Minimum 3+ years’ experience on MV systems, with additional LV experience preferred
• Completed recognised MV/HV switching course if nominated for MV Authorised Person
• Strong understanding of electrical testing, verification, and commissioning procedures
• Proven experience delivering HV/MV infrastructure projects, including data centres, DNO/IDNO networks, or power generation facilities
• Knowledge of EN and local electrical regulations and standards
• Experienced in supervising advanced cable works, phasing, testing, and spiking (where licenced)

What’s on Offer

• €95,000 – €110,000 base salary, dependent on experience
• Full rotational package, including accommodation and travel
• Work on a technically complex, high-profile data centre project in Germany