Commissioning Engineer

g2 Recruitment; Greater London; On-site; GBP 65,000 - 90,000; Full time

Job summary

g2 Recruitment is supporting a leading Data Centre contractor in London to appoint Mechanical & Electrical Commissioning Engineers for a major hyperscale data centre project. The role focuses on commissioning and handover of critical infrastructure in a fast-paced, mission-critical environment.

You will execute commissioning across LV/MV, switchgear, UPS, generators, transformers and HVAC/CRAH/CRAC units, coordinating with BMS, controls and delivery teams to ensure a safe, compliant handover.

Qualifications

• Proven experience as Mechanical or Electrical Commissioning Engineer on data centre or mission-critical projects.
• Strong knowledge of commissioning processes in complex building services environments.
• Right to work in the UK and ability to work on site 5 days a week.

Responsibilities

• Execute and oversee mechanical and electrical commissioning activities across the project lifecycle.
• Support pre-commissioning, commissioning and IST activities and witness testing.
• Coordinate with subcontractors, vendors, and client representatives to ensure delivery.
• Prepare commissioning records, reports, punch lists and handover documentation.
• Review procedures, test scripts and method statements for quality and safety.

Skills

Mechanical commissioning

Electrical commissioning

IST testing

BMS coordination

Health & safety

Stakeholder management

Independent work

Client handover

Tools

BMS systems

Controls software

Commissioning software

Job description

We are currently supporting a leading Data Centre contractor in the appointment of experienced Mechanical & Electrical Commissioning Engineers for a major hyperscale data centre project in London. This is an excellent opportunity to join a high-profile project and play a key role in the commissioning and handover of critical infrastructure systems within a fast-paced mission-critical environment.

Job Title: Mechanical & Electrical Commissioning Engineers

Location: London, UK

Duration: 12 Months (with potential extension)

Start Date: ASAP

Onsite Requirement: 5 days onsite

Key Responsibilities:

• Execute and oversee mechanical and electrical commissioning activities across the project lifecycle.
• Support pre-commissioning, commissioning, and integrated systems testing (IST) activities.
• Commission critical electrical systems including LV/MV distribution, switchgear, UPS systems, generators, transformers, and associated infrastructure.
• Commission mechanical systems including HVAC, CRAH/CRAC units, chilled water systems, pumps, and cooling infrastructure.
• Review commissioning procedures, test scripts, method statements, and commissioning documentation.
• Coordinate with subcontractors, vendors, consultants, and client representatives to ensure successful delivery.
• Monitor commissioning progress and identify, track, and close out system issues.
• Ensure all commissioning activities are carried out safely and in accordance with project specifications and quality standards.
• Support witness testing activities, FATs, SATs, and client demonstrations.
• Work closely with BMS, Controls, CSA, Mechanical, and Electrical delivery teams to ensure successful system integration.
• Prepare and maintain commissioning records, reports, punch lists, and handover documentation.
• Proven experience as a Mechanical or Electrical Commissioning Engineer on Data Centre, Mission Critical, Pharmaceutical, or Industrial projects.
• Strong understanding of commissioning processes within complex building services environments.
• Mechanical engineers should have experience commissioning HVAC, chilled water, cooling systems, pumps, and associated plant.
• Electrical engineers should have experience commissioning LV/MV systems, switchgear, UPS, generators, transformers, and associated infrastructure.
• Experience supporting Integrated Systems Testing (IST) and project handovers.
• Ability to review and interpret technical drawings, schematics, and commissioning documentation.
• Strong knowledge of health and safety procedures within construction and commissioning environments.
• Excellent communication and stakeholder management skills.
• Ability to work independently within a fast-paced project environment.
• Valid right to work in the UK.
• Previous experience working on hyperscale data centre projects.
• Experience working for principal contractors, commissioning consultants, or specialist commissioning providers.
• Knowledge of Cx management processes and commissioning software platforms.
• Experience working alongside BMS, Controls, CSA, Mechanical, Electrical, and Commissioning delivery teams.
• Strong understanding of mission-critical environments and client handover requirements.