Mechanical QA/QC Engineer - London - 145433

Mechanical QA/QC Engineer – Data Centre Project, London

Location: London

Sector: Data Centre / Mission Critical

Reporting to: QA/QC Manager / Mechanical Project Manager

Role Overview

We are seeking an experienced Mechanical QA/QC Engineer to join the project delivery team on a large-scale, fast-track data centre project in London.

The Mechanical QA/QC Engineer will be responsible for ensuring that all mechanical installations are delivered in accordance with the approved drawings, specifications, technical submittals, project quality requirements and applicable standards.

This is a hands‑on, site-based position requiring close coordination with the Mechanical Project Manager, Construction Managers, subcontractors, QA/QC team and Commissioning team.

The successful candidate will be expected to take a proactive approach to quality, inspecting works progressively during installation and driving a right‑first‑time approach, rather than identifying defects at the end of the construction process.

Key Responsibilities

• Implement and maintain the project Mechanical QA/QC procedures and quality requirements.
• Review mechanical drawings, specifications, approved technical submittals, manufacturers' requirements and coordinated BIM information.
• Prepare, review and manage Inspection & Test Plans (ITPs), inspection check sheets and quality records.
• Carry out regular site inspections of mechanical installations and monitor subcontractor workmanship.
• Ensure installations are completed in accordance with approved construction information and project standards.
• Inspect mechanical systems including:
• CHW and glycol systems
• Pipework, valves, strainers and associated equipment
• Pumps and pressurisation systems
• CRAHs / CRACs
• AHUs and ventilation systems
• Ductwork
• Drainage and condensate systems
• Mechanical supports and secondary steel
• Insulation and identification
• BMS mechanical interfaces, sensors and controls
• Mechanical penetrations and associated firestopping
• Ensure equipment is installed in accordance with manufacturers' requirements and approved details.
• Coordinate and witness required mechanical inspections and testing.
• Witness and record activities including pressure testing, flushing, cleaning, chemical treatment, water quality testing and system integrity testing.
• Ensure required inspections and test records are completed before works are covered, insulated or progressed to the next stage.
• Raise and manage NCRs, quality observations and defects, ensuring corrective actions are completed and formally closed.
• Drive progressive snagging and de‑snagging of mechanical installations.
• Monitor recurring quality issues and work with subcontractors to prevent repeat defects.
• Maintain accurate QA/QC trackers covering inspections, testing, NCRs, snags and outstanding documentation.
• Ensure redline drawings and as-built information are progressively maintained and reflect the installed condition.
• Carry out system and area walkdowns with the project team, client, consultant and commissioning representatives.
• Coordinate closely with the Commissioning team to ensure mechanical systems are construction complete and commissioning-ready.
• Verify QA/QC prerequisites prior to L2/L3 commissioning, Functional Performance Testing (FPT) and Integrated Systems Testing (IST).
• Ensure outstanding quality issues are identified early and do not impact commissioning milestones.
• Support compilation and review of test packs, commissioning records, O&M documentation, certificates and final handover information.
• Monitor the protection and preservation of completed mechanical installations and equipment through to handover.
• Produce regular quality reports highlighting outstanding inspections, defects, NCRs, documentation and risks to the programme.

Experience & Skills

• Previous experience as a Mechanical QA/QC Engineer, Mechanical Engineer or Mechanical Supervisor on major construction projects.
• Previous data centre / mission-critical experience strongly preferred.
• Experience working for a General Contractor / Main Contractor or major MEP contractor.
• Strong understanding of mechanical building services and critical cooling systems.
• Good knowledge of pipework, HVAC, cooling plant and associated mechanical equipment.
• Experience preparing and managing ITPs, inspection records, test packs, NCRs and quality documentation.
• Experience with pressure testing, flushing, chemical treatment and mechanical system testing.
• Strong understanding of the relationship between construction completion, QA sign-off and commissioning readiness.
• Ability to read and understand mechanical drawings, schematics, specifications and BIM/coordinated drawings.
• Good understanding of applicable UK standards and mechanical installation requirements.
• Strong organisational and documentation skills.
• Ability to challenge subcontractors constructively and drive quality close‑out.
• Strong communication skills and ability to work effectively with construction and commissioning teams.
• Ability to work within a high-pressure, fast-track project environment.

Qualifications

• Mechanical Engineering / Building Services qualification preferred.
• Appropriate CSCS card.
• SMSTS / SSSTS advantageous.
• Relevant QA/QC qualifications advantageous.
• Data centre / mission-critical experience highly advantageous.

Key Expectations

• Mechanical installations are inspected progressively, not only at completion.
• Works comply with approved drawings, specifications and project quality requirements.
• Inspection and testing documentation is completed contemporaneously with the works.
• Defects and NCRs are identified early and closed promptly.
• Subcontractors maintain the required workmanship standards.
• Testing and commissioning prerequisites are completed ahead of programme milestones.
• Mechanical systems are presented to the Commissioning team fully QA‑complete and ready for testing.
• Snagging is progressively reduced rather than accumulated towards project completion.
• As‑built and handover documentation accurately reflects the completed installation.
• Quality issues do not create avoidable delays to commissioning, FPT, IST or final handover.

This is a hands‑on, site‑based position. The Mechanical QA/QC Engineer is expected to be regularly inspecting installations in the field, challenging poor workmanship and driving issues to closure. The role is not intended to be predominantly desk‑based or limited to the administration of QA documentation.