Site Manager - HV/MV Substations

IOTA Group is an international engineering and technical assistance company supporting major industrial and energy projects worldwide.

For one of our leading partners in the energy and power transmission sector, we are seeking an experienced Site Manager - HV/MV Substations to oversee the construction and execution of a high-voltage electrical substation project in Frankfurt, Germany.

As Site Manager, you will take overall responsibility for the on-site execution of a major 110 kV AIS substation project, ensuring compliance with safety, quality, technical, contractual and scheduling requirements.

The project involves the installation and integration of 110/11.5 kV power transformers, MV switchboards, AIS equipment, protection and control systems, SCADA and substation automation systems.

Key Responsibilities:

• Manage all site construction activities from mobilisation through Mechanical Completion, Ready for Commissioning (RFC), Energisation and Final Handover.
• Coordinate civil, structural, high-voltage electrical, protection & control and commissioning activities.
• Supervise subcontractors, installation teams and multidisciplinary site operations, ensuring compliance with technical specifications and contractual obligations.
• Ensure effective site preparation, logistics, resource allocation and construction planning.
• Develop and monitor construction schedules, resource plans, progress reports and project KPIs.
• Coordinate engineering documentation, technical drawings and construction interfaces with engineering teams and the customer.
• Implement and enforce HSE policies, Zero Harm principles and QA/QC standards throughout project execution.
• Oversee Inspection & Test Plans (ITPs), quality inspections and technical compliance.
• Manage project risks, subcontractor performance, contractual deviations and corrective actions.
• Coordinate Punch Lists, Non-Conformance Reports (NCRs) and close-out activities.
• Organise progress meetings and maintain effective communication with engineering, procurement, construction and commissioning teams.
• Report directly to the Construction Manager based in Grenoble, France.

• Minimum 15 years of experience in HV substation EPC construction projects.
• Strong background in Electromechanical or Electrical Engineering, with extensive knowledge of MV/HV substations and power systems.
• Proven experience managing construction activities on 110 kV AIS substations.
• Demonstrated ability to lead multidisciplinary construction teams and manage subcontractors.
• Strong understanding of IEC standards, electrical protection, control systems and substation construction requirements.
• Experience in construction scheduling, project coordination, quality assurance and HSE management.
• Knowledge of MS Project, AutoCAD, Microsoft Office or similar engineering/project management tools.
• H2V/B2V electrical accreditations or local equivalent.
• Excellent communication, organisational and leadership skills.
• Fluent English and French required.
• German is considered an advantage.

• Position: Site Manager - HV/MV Substations
• Location: Frankfurt am Main, Germany
• Working Schedule: Resident, 5 days per week
• Starting Date: 16 November 2026
• Duration: 6 months (renewable)
• Contract Type: Freelance or Contract
• Languages: English and French mandatory; German is a plus
• Travel: Occasional business trips to Grenoble, France