Commissioning Manager

Optimus Search Limited; Paris; On-site; EUR 129,000 - 203,000; Full time

Job summary

Optimus Search Limited is seeking an experienced Freelance Commissioning Manager to oversee the commissioning and handover of critical infrastructure on a hyperscale data centre project in Paris. You will manage the commissioning programme across mechanical and electrical systems, coordinating specialist contractors and ensuring successful testing and handover.

The role requires 8+ years in commissioning, strong technical knowledge of electrical and mechanical systems, and proven leadership to

Qualifications

• 8+ years' experience in commissioning.
• Experience managing commissioning on hyperscale data centre projects.
• Strong technical understanding of critical electrical and mechanical infrastructure.
• Experience managing Level 1–5 commissioning programmes.
• Coordinating MEP contractors, specialist vendors and commissioning teams.
• Strong understanding of energisation, functional performance testing and integrated systems testing.
• Excellent leadership, communication and stakeholder management skills.
• English essential; French advantageous.

Responsibilities

• Lead Level 1–5 commissioning activities across mechanical and electrical infrastructure.
• Develop and manage the commissioning execution plan, schedules, test procedures and handover strategy.
• Oversee commissioning of MV/LV switchgear, UPS, generators, transformers and critical power distribution.
• Coordinate commissioning of chilled water systems, cooling equipment, CRAH units, pumps and mechanical infra.
• Manage commissioning engineers, subcontractors and equipment vendors.
• Coordinate energisation readiness, start-up and functional performance testing.
• Oversee BMS and EPMS integration, controls verification and alarm testing.
• Lead Level 4 testing and Level 5 integrated systems testing including failure simulations.
• Monitor progress, resolve issues and manage defect close-out.
• Coordinate handovers and ensure documentation meets requirements.
• Report progress, risks and milestones to project leadership.

Skills

Commissioning

Project management

Stakeholder management

Leadership

MEP coordination

Electrical systems

Mechanical systems

Testing & energisation

English proficiency

Job description

Freelance Commissioning Manager – Data Centre

Location: Paris, France (On-site)

Contract: Freelance | Long-term

Start Date: ASAP / Flexible

The Opportunity

We are looking for an experienced Commissioning Manager to oversee the commissioning and handover of critical infrastructure on a hyperscale data centre project in Paris.

The role will involve managing the commissioning programme across mechanical and electrical systems, coordinating specialist contractors and ensuring the facility progresses successfully through functional testing, integrated systems testing and operational handover.

The successful candidate will work closely with the project delivery team, commissioning authority, MEP contractors and equipment vendors.

Key Responsibilities

• Lead and coordinate Level 1–5 commissioning activities across mechanical and electrical infrastructure.
• Develop and manage the commissioning execution plan, schedules, test procedures and system handover strategy.
• Oversee commissioning of MV/LV switchgear, UPS systems, generators, transformers and critical power distribution.
• Coordinate commissioning of chilled water systems, cooling equipment, CRAH units, pumps and associated mechanical infrastructure.
• Manage commissioning engineers, specialist subcontractors and equipment vendors.
• Coordinate energisation readiness, equipment start-up and functional performance testing.
• Oversee BMS and EPMS integration, controls verification and alarm testing.
• Lead Level 4 functional performance testing and Level 5 integrated systems testing, including failure simulations and redundancy scenarios.
• Monitor commissioning progress, resolve technical issues and manage defect close-out.
• Coordinate system handovers and ensure all commissioning documentation meets client requirements.
• Report commissioning progress, risks and key milestones to project leadership.

Requirements

• Minimum 8+ years' experience in commissioning, including management responsibilities.
• Proven experience managing commissioning on hyperscale data centre projects.
• Strong technical understanding of critical electrical and mechanical infrastructure.
• Experience managing Level 1–5 commissioning programmes.
• Previous experience coordinating MEP contractors, specialist vendors and commissioning teams.
• Strong understanding of energisation, functional performance testing and integrated systems testing.
• Excellent leadership, communication and stakeholder management skills.
• English essential; French highly advantageous.